diff --git a/src/char_gpt2_ff.py b/src/char_gpt2_ff.py
new file mode 100644
index 0000000..c1cd2cb
--- /dev/null
+++ b/src/char_gpt2_ff.py
@@ -0,0 +1,115 @@
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from einops import rearrange
+import numpy as np
+from torch.utils.tensorboard import SummaryWriter
+from datetime import datetime
+import sys
+from pathlib import Path
+torch.manual_seed(1337)
+
+#################################### Model #########################################
+
+
+# RoFormer: Enhanced Transformer with Rotary Position Embedding https://arxiv.org/abs/2104.09864
+class RoPE(nn.Module):
+    def __init__(self, dim, max_seq_len=512):
+        super().__init__()
+        inv_freq = 1.0 / (10000 ** (torch.arange(0, dim, 2).float() / dim))
+        t = torch.arange(max_seq_len).type_as(inv_freq)
+        freqs = torch.einsum('i,j->ij', t, inv_freq)
+        self.register_buffer('emb', torch.cat([freqs, freqs], dim=-1))
+
+    def rotate_half(self, x):
+        x1, x2 = x.chunk(2, dim=-1)
+        return torch.cat((-x2, x1), dim=-1)
+
+    def forward(self, x, offset=0):
+        seq_len = x.size(1)
+        emb = self.emb[offset:offset+seq_len].view(1, seq_len, -1)
+        cos = emb.cos()
+        sin = emb.sin()
+        return (x * cos) + (self.rotate_half(x) * sin)
+
+# Transformers without Normalization https://jiachenzhu.github.io/DyT/
+class DyT(nn.Module):
+    def __init__(self, num_features, alpha_init_value=0.5):
+        super().__init__()
+        self.alpha = nn.Parameter(torch.ones(1) * alpha_init_value)
+        self.weight = nn.Parameter(torch.ones(num_features))
+        self.bias = nn.Parameter(torch.zeros(num_features))
+
+    def forward(self, x):
+        x = torch.tanh(self.alpha * x)
+        return x * self.weight + self.bias
+
+# Attention Is All You Need https://arxiv.org/pdf/1706.03762v7
+# NeoBERT: A Next-Generation BERT https://arxiv.org/html/2502.19587v1
+class TransformerLayer(nn.Module):
+    def __init__(self, h_dim, num_heads=4, dropout_rate = 0.1, max_seq_len = 128):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.q_proj = nn.Linear(h_dim, h_dim)
+        self.k_proj = nn.Linear(h_dim, h_dim)
+        self.v_proj = nn.Linear(h_dim, h_dim)
+        self.o_proj = nn.Linear(h_dim, h_dim)
+        self.ff1 = nn.Linear(h_dim, 4*h_dim)
+        self.ff2 = nn.Linear(4*h_dim, h_dim)
+        self.ln1 = DyT(h_dim)
+        self.ln2 = DyT(h_dim)
+        self.rope = RoPE(dim=h_dim//self.num_heads, max_seq_len=max_seq_len)
+
+    def split_to_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, 'b t (n h) -> (b n) t h', b=B, t=T, n=self.num_heads)
+
+    def gather_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, '(b n) t h -> b t (n h)', b=B, t=T, n=self.num_heads)
+
+    def attention(self, x):
+        q = self.rope(self.split_to_heads(self.q_proj(x), *x.shape))
+        k = self.rope(self.split_to_heads(self.k_proj(x), *x.shape))
+        v = self.split_to_heads(self.v_proj(x), *x.shape)
+        scores = (q @ k.transpose(1, 2)) * (self.h_dim ** -0.5)
+        tril = torch.tril(torch.ones(x.shape[1],x.shape[1])).to(self.q_proj.bias.device)
+        scores = scores.masked_fill(tril == 0, float('-inf')) # encoder does not need this line
+        attention = nn.functional.softmax(scores, dim=2)
+        return self.o_proj(self.gather_heads(attention @ v, *x.shape))
+
+    def forward(self, x):
+        x = x + F.dropout1d(self.attention(self.ln1(x)), p=self.dropout_rate)
+        x = x + F.dropout1d(self.ff2(F.gelu(self.ff1(self.ln2(x)))), p=self.dropout_rate)
+        return x
+
+class GPT2(nn.Module):
+    def __init__(self, vocab_size, layers_num=1, h_dim=64, max_seq_len=64, num_heads=1, dropout_rate = 0.1, pixel_size=None):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.layers = nn.ModuleList([
+            TransformerLayer(h_dim=self.h_dim, num_heads=self.num_heads, dropout_rate=self.dropout_rate, max_seq_len=self.max_seq_len) 
+            for _ in range(layers_num)])
+        self.tok_embeds = nn.Embedding(vocab_size, h_dim)
+        self.pos_embeds = nn.Parameter(torch.randn(1, self.max_seq_len, h_dim))
+        self.lm_head = nn.Linear(h_dim, vocab_size)
+
+    def forward(self, x, targets=None):
+        x = self.tok_embeds(x) + self.pos_embeds[:, :x.shape[1], :]
+        for l in self.layers:
+            x = l(x)
+        logits = self.lm_head(x) # B,T,C
+        loss = F.cross_entropy(rearrange(logits, "b t c -> b c t"), targets) if not targets is None else None
+        return logits, loss
+
+    # what is the purpose? autoregressive inference!
+    def generate(self, start_idx, max_new_tokens):
+        idx = start_idx
+        for i in range(max_new_tokens):
+            idx_cond = idx[:,-self.max_seq_len:]
+            logits, loss = self(idx_cond)
+            logits = logits[:,-1,:] # B, C
+            probs = F.softmax(logits, dim=-1)
+            idx_next = torch.multinomial(probs, num_samples=1).to(self.lm_head.bias.device)
+            idx = torch.cat([idx, idx_next], dim=1)
+        return idx
\ No newline at end of file
diff --git a/src/main.py b/src/main.py
index bf5c414..24406f8 100644
--- a/src/main.py
+++ b/src/main.py
@@ -9,23 +9,30 @@ import sys
 from pathlib import Path
 from char_gpt2 import GPT2
 from optics_char_gpt2 import OpticGPT2
+from optics_char_gpt2_traindiag import OpticGPT2TrainDiag
+from optics_char_gpt2_ff import OpticGPT2FF
 seed = 1337
 torch.manual_seed(seed)
-models = {'gpt2': GPT2, 'optic_gpt2': OpticGPT2}
+models = {'gpt2': GPT2, 'optic_gpt2': OpticGPT2, 'optic_gpt2_ff': OpticGPT2FF, 'optic_gpt2_traindiag':OpticGPT2TrainDiag}
 
-batch_size = 50
-max_iters = 40000
+batch_size = 25
+max_iters = 40000*2
 eval_interval = 300
 learning_rate = 1e-3
 device = 'cuda' if torch.cuda.is_available() else 'cpu'
 eval_iters = 200
-layers_num = 22
+layers_num = 2
 h_dim = 64
-max_seq_len = 256
-num_heads = 4
+max_seq_len = 64
+num_heads = 1
 dropout_rate = 0.1
 pixel_size = 3.6e-6
-
+# CUDA_VISIBLE_DEVICES=1 python src/main.py optic_gpt2_ff ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_128_hdim_64
+# CUDA_VISIBLE_DEVICES=2 python src/main.py optic_gpt2_ff ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_128_hdim_128
+# CUDA_VISIBLE_DEVICES=3 python src/main.py optic_gpt2_ff ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_128_hdim_256
+# CUDA_VISIBLE_DEVICES=4 python src/main.py gpt2 ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_64_hdim_64
+# CUDA_VISIBLE_DEVICES=5 python src/main.py gpt2 ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_64_hdim_128
+# CUDA_VISIBLE_DEVICES=6 python src/main.py gpt2 ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens seq_64_hdim_256
 # CUDA_VISIBLE_DEVICES=1 python .src/main.py gpt2|optic_gpt2 ./data/wiki.train.tokens ./data/wiki.valid.tokens ./data/wiki.test.tokens comment
 MODEL_CLASS = models[sys.argv[1]]
 train_data_path = Path(sys.argv[2])
diff --git a/src/optical_matrix_multiplication/config.py b/src/optical_matrix_multiplication/config.py
index 26c8589..7b84265 100644
--- a/src/optical_matrix_multiplication/config.py
+++ b/src/optical_matrix_multiplication/config.py
@@ -274,7 +274,8 @@ class Config(ConfigOpticBase, ConfigModelBase):
                  wavelength: float = 532e-9,
                  distance: float = 0.03,
                  lens_pixel_size: float = 1.8e-6,
-                 lens_size: int = 8192):
+                 lens_size: int = 8192,
+                 trainable_cylind_lens = False):
         """
         Конструктор класса.
  
@@ -294,6 +295,7 @@ class Config(ConfigOpticBase, ConfigModelBase):
             distance: дистанция в метрах распространения светового поля между плоскостями.
             lens_pixel_size: размер пикселя в метрах скрещенных линз в оптической системе (нужен исключительно для моделирования).
             lens_size: размер скрещенных линз в метрах в оптической системе (нужен исключительно для моделирования).
+            trainable_cylind_lens: обучаемые диагональные матрицы, линза перед фурье плоскостью
         """
         ConfigOpticBase.__init__(self, wavelength, distance)
 
@@ -320,6 +322,7 @@ class Config(ConfigOpticBase, ConfigModelBase):
         self._input_vector_split_x: int = left_matrix_split_x
         self._input_vector_split_y: int = left_matrix_split_y
         self._result_vector_split: int = result_matrix_split
+        self._trainable_cylind_lens = trainable_cylind_lens
 
     @property
     def matrix_split_x(self) -> int:
diff --git a/src/optical_matrix_multiplication/optical_mul.py b/src/optical_matrix_multiplication/optical_mul.py
index 4985adc..cb3e398 100644
--- a/src/optical_matrix_multiplication/optical_mul.py
+++ b/src/optical_matrix_multiplication/optical_mul.py
@@ -19,14 +19,29 @@ class OpticalMul(_nn.Module):
         prop_one = _PropSinc(config.input_vector_plane, config.first_lens_plane, config)
         prop_two = _PropCrossLens(config.first_lens_plane, config)
         prop_three = _PropSinc(config.first_lens_plane, config.matrix_plane, config)
-        prop_four = _PropСylindLens(config.matrix_plane, config)
+        prop_four = _PropСylindLens(config.matrix_plane, config, trainable=config._trainable_cylind_lens)
         prop_five = _PropSinc(config.matrix_plane, config.second_lens_plane, config)
         prop_six = _PropCrossLens(config.second_lens_plane, config).T
         prop_seven = _PropSinc(config.second_lens_plane, config.output_vector_plane, config)
 
-        self._propagator_one: _Prop = prop_one + prop_two + prop_three + prop_four
+        # print(prop_one)
+        # print(prop_two)
+        # print(prop_three)
+        # print(prop_four)
+        # print(prop_five)
+        # print((prop_one + prop_two + prop_three))
+        # print((prop_one + prop_two + prop_three + prop_four))
+
+        self._propagator_one: _Prop = prop_one + prop_two + prop_three 
+        self._propagator_between = prop_four
         self._propagator_two: _Prop = prop_five + prop_six + prop_seven
 
+        # print(self._propagator_one)
+        # print(self._propagator_between)
+        # print(self._propagator_between.operator_X)
+        # print(self._propagator_between.operator_Y)
+        # print(self._propagator_two)
+
         kron_vec_utils = _torch.ones((config.input_vector_split_y, config.input_vector_split_x))
         kron_mat_utils = _torch.ones((config.matrix_split_x, config.matrix_split_y))
         self.register_buffer('_kron_vec_utils', kron_vec_utils, persistent=True)
@@ -111,6 +126,7 @@ class OpticalMul(_nn.Module):
         mat_field = self.prepare_matrix(other)
 
         vec_field = self._propagator_one(vec_field)
+        vec_field = self._propagator_between(vec_field)
         vec_field = self._propagator_two(vec_field * mat_field)
 
         return self.prepare_out(vec_field)
\ No newline at end of file
diff --git a/src/optical_matrix_multiplication/propagator.py b/src/optical_matrix_multiplication/propagator.py
index c667bd6..68ee2c4 100644
--- a/src/optical_matrix_multiplication/propagator.py
+++ b/src/optical_matrix_multiplication/propagator.py
@@ -16,12 +16,20 @@ class Propagator(_ABC, _nn.Module):
         operator_X: оператор отображающий распроcтранение светового поля вдоль оси абсцисс
         operator_Y: оператор отображающий распроcтранение светового поля вдоль оси ординат
     """
-    def __init__(self, operator_X: _torch.Tensor, operator_Y: _torch.Tensor):
+    def __init__(self, operator_X: _torch.Tensor, operator_Y: _torch.Tensor, trainable = False, diagonal = False):
         super(Propagator, self).__init__()
         operator_X: _torch.Tensor = _torch.view_as_real(operator_X)
         operator_Y: _torch.Tensor = _torch.view_as_real(operator_Y)
-        self.register_buffer('_operator_X', operator_X, persistent=True)
-        self.register_buffer('_operator_Y', operator_Y, persistent=True)
+        if trainable:
+            self._operator_X = _nn.Parameter(operator_X)
+            self._operator_Y = _nn.Parameter(operator_Y)
+            self._trainable = trainable
+            self._diagonal = diagonal
+        else:
+            self.register_buffer('_operator_X', operator_X, persistent=True)
+            self.register_buffer('_operator_Y', operator_Y, persistent=True)
+            self._trainable = trainable
+            self._diagonal = diagonal
 
     @property
     def operator_X(self) -> _torch.Tensor:
@@ -103,7 +111,13 @@ class Propagator(_ABC, _nn.Module):
             Распределение комплексной амплитуды светового поля,
             после распространения.
         """
-        return self.operator_Y @ field @ self.operator_X
+        if self._diagonal:
+            return _torch.diag_embed(self.operator_Y) @ field @ _torch.diag_embed(self.operator_X)
+        else:
+            return self.operator_Y @ field @ self.operator_X
+
+    def __repr__(self):
+        return f"Diag: {self._diagonal} Trainable: {self._trainable} Y shape: {self.operator_Y.shape}, X shape: {self.operator_X.shape}"
 
 class PropagatorLens(Propagator):
     """
@@ -133,7 +147,7 @@ class PropagatorCrossLens(PropagatorLens):
     представленной тонким оптическим элементом.
     """
     def __init__(self, plane: _ConfigDesignPlane,
-                 config: _ConfigOpticBase):
+                 config: _ConfigOpticBase, trainable = False):
         """
         Конструктор класса скрещенной линзы.
 
@@ -144,7 +158,8 @@ class PropagatorCrossLens(PropagatorLens):
         operator_X = _torch.exp(-1j * config.K / config.distance * plane.linspace_by_x**2)
         operator_Y = _torch.exp(-1j * config.K / 2 / config.distance * plane.linspace_by_y**2)
         super(PropagatorCrossLens, self).__init__(_torch.diag_embed(operator_X),
-                                                  _torch.diag_embed(operator_Y))
+                                                  _torch.diag_embed(operator_Y), 
+                                                  trainable)
 
 class PropagatorСylindLens(PropagatorLens):
     """
@@ -152,7 +167,7 @@ class PropagatorСylindLens(PropagatorLens):
     представленной тонким оптическим элементом.
     """
     def __init__(self, plane: _ConfigDesignPlane,
-                 config: _ConfigOpticBase):
+                 config: _ConfigOpticBase, trainable = False):
         """
         Конструктор класса цилиндрической линзы.
 
@@ -162,8 +177,10 @@ class PropagatorСylindLens(PropagatorLens):
         """
         operator_X = _torch.exp(-1j * config.K / config.distance * plane.linspace_by_x**2)
         operator_Y = _torch.ones_like(plane.linspace_by_y, dtype=_torch.cfloat)
-        super(PropagatorСylindLens, self).__init__(_torch.diag_embed(operator_X),
-                                                   _torch.diag_embed(operator_Y))
+        super(PropagatorСylindLens, self).__init__(operator_X,
+                                                   operator_Y, 
+                                                   trainable, 
+                                                   diagonal=True)
 
 class PropagatorSinc(Propagator):
     """
@@ -172,7 +189,7 @@ class PropagatorSinc(Propagator):
     """
     def __init__(self, first_plane: _ConfigDesignPlane,
                  second_plane: _ConfigDesignPlane,
-                 config: _ConfigOpticBase):
+                 config: _ConfigOpticBase, trainable = False):
         """
         Конструктор класса распространения в свободном пространстве.
 
@@ -184,7 +201,7 @@ class PropagatorSinc(Propagator):
         operator_X, operator_Y = self.__get_operators(first_plane,
                                                     second_plane,
                                                     config)
-        super(PropagatorSinc, self).__init__(operator_X, operator_Y)
+        super(PropagatorSinc, self).__init__(operator_X, operator_Y, trainable)
 
     def __get_operator_for_dim(self,
                              pixel_size_in: float,
@@ -217,4 +234,4 @@ class PropagatorSinc(Propagator):
                                                second_plane.pixel_size_by_y,
                                                difference_y,
                                                config)
-        return operator_X, operator_Y
+        return operator_X, operator_Y
\ No newline at end of file
diff --git a/src/optics_char_gpt2_ff.py b/src/optics_char_gpt2_ff.py
new file mode 100644
index 0000000..2347bf9
--- /dev/null
+++ b/src/optics_char_gpt2_ff.py
@@ -0,0 +1,218 @@
+import torch
+import torch.nn as nn
+from torch.nn import functional as F, init
+from einops import rearrange
+import optical_matrix_multiplication as omm
+from optical_matrix_multiplication import propagator
+import numpy as np
+from torch.utils.tensorboard import SummaryWriter
+from datetime import datetime
+from pathlib import Path
+import sys
+import math
+torch.manual_seed(1337)
+
+#################################### Model #########################################
+
+def norm(matrix: torch.Tensor, max_val: float = 1) -> torch.Tensor:
+    return matrix / (max_val + 1e-10)
+
+def optics_matmul_shift(sim, tensor_1, tensor_2):
+    # print(tensor_1.shape, tensor_2.shape)
+
+    tensor_1 = tensor_1[None,:,:,:]
+    tensor_2 = tensor_2[None,None,:,:]
+    # print(tensor_1.shape, tensor_2.shape)
+    # raise RuntimeError
+
+    if torch.min(tensor_1) >= 0 and torch.min(tensor_2) >= 0:
+        max_abs = abs(max(torch.max(tensor_1), torch.max(tensor_2)))
+        a, b =  norm(tensor_1, max_abs), norm(tensor_2, max_abs)
+        return sim(a, b)[0,:,:,:] * max_abs **2
+
+    min_abs = abs(min(torch.min(tensor_1), torch.min(tensor_2)))
+    max_abs = abs(max(torch.max(tensor_1), torch.max(tensor_2))) + min_abs
+
+    shift_a = min_abs * torch.ones(tensor_1.shape).to(tensor_1.device)
+    shift_b = min_abs * torch.ones(tensor_2.shape).to(tensor_1.device)
+    a_a_sh = tensor_1 + shift_a
+    b_b_sh = tensor_2 + shift_b
+
+    a_a_sh_norm, b_b_sh_norm = norm(a_a_sh, max_abs), norm(b_b_sh, max_abs)
+    shift_a_norm, shift_b_norm = norm(shift_a, max_abs), norm(shift_b, max_abs) 
+    a_a_sh_b_b_sh = sim(a_a_sh_norm, b_b_sh_norm)
+    a_a_sh_b_sh = sim(a_a_sh_norm, shift_b_norm)
+    a_sh_b_b_sh = sim(shift_a_norm, b_b_sh_norm)
+    a_sh_b_sh = sim(shift_a_norm, shift_b_norm)
+
+    return (a_a_sh_b_b_sh - a_a_sh_b_sh - a_sh_b_b_sh + a_sh_b_sh)[0,:,:,:] * max_abs ** 2
+
+# RoFormer: Enhanced Transformer with Rotary Position Embedding https://arxiv.org/abs/2104.09864
+class RoPE(nn.Module):
+    def __init__(self, dim, max_seq_len=512):
+        super().__init__()
+        inv_freq = 1.0 / (10000 ** (torch.arange(0, dim, 2).float() / dim))
+        t = torch.arange(max_seq_len).type_as(inv_freq)
+        freqs = torch.einsum('i,j->ij', t, inv_freq)
+        self.register_buffer('emb', torch.cat([freqs, freqs], dim=-1))
+
+    def rotate_half(self, x):
+        x1, x2 = x.chunk(2, dim=-1)
+        return torch.cat((-x2, x1), dim=-1)
+
+    def forward(self, x, offset=0):
+        seq_len = x.size(1)
+        emb = self.emb[offset:offset+seq_len].view(1, seq_len, -1)
+        cos = emb.cos()
+        sin = emb.sin()
+        return (x * cos) + (self.rotate_half(x) * sin)
+
+# Transformers without Normalization https://jiachenzhu.github.io/DyT/
+class DyT(nn.Module):
+    def __init__(self, num_features, alpha_init_value=0.5):
+        super().__init__()
+        self.alpha = nn.Parameter(torch.ones(1) * alpha_init_value)
+        self.weight = nn.Parameter(torch.ones(num_features))
+        self.bias = nn.Parameter(torch.zeros(num_features))
+
+    def forward(self, x):
+        x = torch.tanh(self.alpha * x)
+        return x * self.weight + self.bias
+
+class OpticLinear(nn.Module):
+    def __init__(
+        self,
+        in_features,
+        out_features,
+        bias = True,
+        device = None,
+        dtype = None,
+        pixel_size = 3.6e-6
+    ) -> None:
+        factory_kwargs = {"device": device, "dtype": dtype}
+        super().__init__()
+        self.in_features = in_features
+        self.out_features = out_features
+        self.weight = nn.Parameter(
+            torch.empty((in_features, out_features), **factory_kwargs)
+        )
+        # print(self.weight.shape)
+        if bias:
+            self.bias = nn.Parameter(torch.empty(out_features, **factory_kwargs))
+        else:
+            self.register_parameter("bias", None)
+        self.k = nn.Parameter(torch.randn(1))
+        self.sim = omm.OpticalMul(
+            omm.Config(
+                right_matrix_count_columns = out_features ,
+                right_matrix_count_rows = in_features,
+                right_matrix_width = pixel_size * out_features ,
+                right_matrix_height = pixel_size * in_features,
+                min_height_gap = pixel_size,
+                right_matrix_split_x = 2,
+                right_matrix_split_y = 2,
+                left_matrix_split_x = 2,
+                left_matrix_split_y = 2,
+                result_matrix_split = 2,
+                distance = 0.01)
+        )
+        self.reset_parameters()
+
+    def forward(self, input):
+        """
+        Runs the forward pass.
+        """
+        return self.k * optics_matmul_shift(self.sim, input, self.weight) + self.bias
+
+    def reset_parameters(self) -> None:
+        """
+        Resets parameters based on their initialization used in ``__init__``.
+        """
+        # Setting a=sqrt(5) in kaiming_uniform is the same as initializing with
+        # uniform(-1/sqrt(in_features), 1/sqrt(in_features)). For details, see
+        # https://github.com/pytorch/pytorch/issues/57109
+        init.kaiming_uniform_(self.weight, a=math.sqrt(5))
+        if self.bias is not None:
+            fan_in, _ = init._calculate_fan_in_and_fan_out(self.weight)
+            bound = 1 / math.sqrt(fan_in) if fan_in > 0 else 0
+            init.uniform_(self.bias, -bound, bound)
+
+    def extra_repr(self) -> str:
+        """
+        Return the extra representation of the module.
+        """
+        return f"in_features={self.in_features}, out_features={self.out_features}, bias={self.bias is not None}"
+
+
+
+# Attention Is All You Need https://arxiv.org/pdf/1706.03762v7
+# NeoBERT: A Next-Generation BERT https://arxiv.org/html/2502.19587v1
+class TransformerLayer(nn.Module):
+    def __init__(self, h_dim, num_heads=4, dropout_rate = 0.1, max_seq_len = 128):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.q_proj = nn.Linear(h_dim, h_dim)
+        self.k_proj = nn.Linear(h_dim, h_dim)
+        self.v_proj = nn.Linear(h_dim, h_dim)
+        self.o_proj = nn.Linear(h_dim, h_dim)
+        self.ff1 = OpticLinear(h_dim, 4*h_dim)
+        self.ff2 = OpticLinear(4*h_dim, h_dim)
+        self.ln1 = DyT(h_dim)
+        self.ln2 = DyT(h_dim)
+        self.rope = RoPE(dim=h_dim//self.num_heads, max_seq_len=max_seq_len)
+
+    def split_to_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, 'b t (n h) -> (b n) t h', b=B, t=T, n=self.num_heads)
+
+    def gather_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, '(b n) t h -> b t (n h)', b=B, t=T, n=self.num_heads)
+
+    def attention(self, x):
+        q = self.rope(self.split_to_heads(self.q_proj(x), *x.shape))
+        k = self.rope(self.split_to_heads(self.k_proj(x), *x.shape))
+        v = self.split_to_heads(self.v_proj(x), *x.shape)
+        scores = (q @ k.transpose(1, 2)) * (self.h_dim ** -0.5)
+        tril = torch.tril(torch.ones(x.shape[1],x.shape[1])).to(self.q_proj.bias.device)
+        scores = scores.masked_fill(tril == 0, float('-inf')) # encoder does not need this line
+        attention = nn.functional.softmax(scores, dim=2)
+        return self.o_proj(self.gather_heads(attention @ v, *x.shape))
+
+    def forward(self, x):
+        x = x + F.dropout1d(self.attention(self.ln1(x)), p=self.dropout_rate)
+        x = x + F.dropout1d(self.ff2(F.gelu(self.ff1(self.ln2(x)))), p=self.dropout_rate)
+        return x
+
+class OpticGPT2FF(nn.Module):
+    def __init__(self, vocab_size, layers_num=1, h_dim=64, max_seq_len=64, num_heads=1, dropout_rate = 0.1,
+                 pixel_size = 3.6e-6):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.layers = nn.ModuleList([
+            TransformerLayer(h_dim=self.h_dim, num_heads=self.num_heads, 
+                dropout_rate=self.dropout_rate, max_seq_len=self.max_seq_len) 
+            for _ in range(layers_num)])
+        self.tok_embeds = nn.Embedding(vocab_size, h_dim)
+        self.pos_embeds = nn.Parameter(torch.randn(1, self.max_seq_len, h_dim))
+        self.lm_head = nn.Linear(h_dim, vocab_size)
+
+    def forward(self, x, targets=None):
+        x = self.tok_embeds(x) + self.pos_embeds[:, :x.shape[1], :]
+        for l in self.layers:
+            x = l(x)
+        logits = self.lm_head(x) # B,T,C
+        loss = F.cross_entropy(rearrange(logits, "b t c -> b c t"), targets) if not targets is None else None
+        return logits, loss
+
+    # what is the purpose? autoregressive inference!
+    def generate(self, start_idx, max_new_tokens):
+        idx = start_idx
+        for i in range(max_new_tokens):
+            idx_cond = idx[:,-self.max_seq_len:]
+            logits, loss = self(idx_cond)
+            logits = logits[:,-1,:] # B, C
+            probs = F.softmax(logits, dim=-1)
+            idx_next = torch.multinomial(probs, num_samples=1).to(self.lm_head.bias.device)
+            idx = torch.cat([idx, idx_next], dim=1)
+        return idx
\ No newline at end of file
diff --git a/src/optics_char_gpt2_traindiag.py b/src/optics_char_gpt2_traindiag.py
new file mode 100644
index 0000000..2cdfc81
--- /dev/null
+++ b/src/optics_char_gpt2_traindiag.py
@@ -0,0 +1,179 @@
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from einops import rearrange
+import optical_matrix_multiplication as omm
+from optical_matrix_multiplication import propagator
+import numpy as np
+from torch.utils.tensorboard import SummaryWriter
+from datetime import datetime
+from pathlib import Path
+import sys
+torch.manual_seed(1337)
+
+#################################### Model #########################################
+
+def norm(matrix: torch.Tensor, max_val: float = 1) -> torch.Tensor:
+    return matrix / (max_val + 1e-10)
+
+def optics_matmul_shift(sim, tensor_1, tensor_2):
+    tensor_1 = tensor_1[None,:,:,:]
+    tensor_2 = tensor_2[None,:,:,:]
+
+    if torch.min(tensor_1) >= 0 and torch.min(tensor_2) >= 0:
+        max_abs = abs(max(torch.max(tensor_1), torch.max(tensor_2)))
+        a, b =  norm(tensor_1, max_abs), norm(tensor_2, max_abs)
+        return sim(a, b)[0,:,:,:] * max_abs **2
+
+    min_abs = abs(min(torch.min(tensor_1), torch.min(tensor_2)))
+    max_abs = abs(max(torch.max(tensor_1), torch.max(tensor_2))) + min_abs
+
+    shift_a = min_abs * torch.ones(tensor_1.shape).to(tensor_1.device)
+    shift_b = min_abs * torch.ones(tensor_2.shape).to(tensor_1.device)
+    a_a_sh = tensor_1 + shift_a
+    b_b_sh = tensor_2 + shift_b
+
+    a_a_sh_norm, b_b_sh_norm = norm(a_a_sh, max_abs), norm(b_b_sh, max_abs)
+    shift_a_norm, shift_b_norm = norm(shift_a, max_abs), norm(shift_b, max_abs) 
+    a_a_sh_b_b_sh = sim(a_a_sh_norm, b_b_sh_norm)
+    a_a_sh_b_sh = sim(a_a_sh_norm, shift_b_norm)
+    a_sh_b_b_sh = sim(shift_a_norm, b_b_sh_norm)
+    a_sh_b_sh = sim(shift_a_norm, shift_b_norm)
+
+    return (a_a_sh_b_b_sh - a_a_sh_b_sh - a_sh_b_b_sh + a_sh_b_sh)[0,:,:,:] * max_abs ** 2
+
+# RoFormer: Enhanced Transformer with Rotary Position Embedding https://arxiv.org/abs/2104.09864
+class RoPE(nn.Module):
+    def __init__(self, dim, max_seq_len=512):
+        super().__init__()
+        inv_freq = 1.0 / (10000 ** (torch.arange(0, dim, 2).float() / dim))
+        t = torch.arange(max_seq_len).type_as(inv_freq)
+        freqs = torch.einsum('i,j->ij', t, inv_freq)
+        self.register_buffer('emb', torch.cat([freqs, freqs], dim=-1))
+
+    def rotate_half(self, x):
+        x1, x2 = x.chunk(2, dim=-1)
+        return torch.cat((-x2, x1), dim=-1)
+
+    def forward(self, x, offset=0):
+        seq_len = x.size(1)
+        emb = self.emb[offset:offset+seq_len].view(1, seq_len, -1)
+        cos = emb.cos()
+        sin = emb.sin()
+        return (x * cos) + (self.rotate_half(x) * sin)
+
+# Transformers without Normalization https://jiachenzhu.github.io/DyT/
+class DyT(nn.Module):
+    def __init__(self, num_features, alpha_init_value=0.5):
+        super().__init__()
+        self.alpha = nn.Parameter(torch.ones(1) * alpha_init_value)
+        self.weight = nn.Parameter(torch.ones(num_features))
+        self.bias = nn.Parameter(torch.zeros(num_features))
+
+    def forward(self, x):
+        x = torch.tanh(self.alpha * x)
+        return x * self.weight + self.bias
+
+# Attention Is All You Need https://arxiv.org/pdf/1706.03762v7
+# NeoBERT: A Next-Generation BERT https://arxiv.org/html/2502.19587v1
+class TransformerLayer(nn.Module):
+    def __init__(self, h_dim, sim_scores, sim_output, num_heads=4, dropout_rate = 0.1, max_seq_len = 128):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.q_proj = nn.Linear(h_dim, h_dim)
+        self.k_proj = nn.Linear(h_dim, h_dim)
+        self.v_proj = nn.Linear(h_dim, h_dim)
+        self.o_proj = nn.Linear(h_dim, h_dim)
+        self.ff1 = nn.Linear(h_dim, 4*h_dim)
+        self.ff2 = nn.Linear(4*h_dim, h_dim)
+        self.ln1 = DyT(h_dim)
+        self.ln2 = DyT(h_dim)
+        self.rope = RoPE(dim=h_dim//self.num_heads, max_seq_len=max_seq_len)
+        self.k1 = nn.Parameter(torch.randn(1))
+        self.k2 = nn.Parameter(torch.randn(1))
+
+    def split_to_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, 'b t (n h) -> (b n) t h', b=B, t=T, n=self.num_heads)
+
+    def gather_heads(self, x, B, T, H):
+        if self.num_heads <= 1: return x
+        return rearrange(x, '(b n) t h -> b t (n h)', b=B, t=T, n=self.num_heads)
+
+    def attention(self, x):
+        q = self.rope(self.split_to_heads(self.q_proj(x), *x.shape))
+        k = self.rope(self.split_to_heads(self.k_proj(x), *x.shape))
+        v = self.split_to_heads(self.v_proj(x), *x.shape)
+        scores = self.k1 * optics_matmul_shift(self.sim_scores, q, k.transpose(1, 2)) * (self.h_dim ** -0.5) 
+        tril = torch.tril(torch.ones(x.shape[1],x.shape[1])).to(self.q_proj.bias.device)
+        scores = scores.masked_fill(tril == 0, float('-inf'))
+        attention = nn.functional.softmax(scores, dim=2)
+        output = self.k2 * optics_matmul_shift(self.sim_output, attention, v)
+        return self.o_proj(self.gather_heads(output, *x.shape))
+
+    def forward(self, x):
+        x = x + F.dropout1d(self.attention(self.ln1(x)), p=self.dropout_rate)
+        x = x + F.dropout1d(self.ff2(F.gelu(self.ff1(self.ln2(x)))), p=self.dropout_rate)
+        return x
+
+class OpticGPT2TrainDiag(nn.Module):
+    def __init__(self, vocab_size, layers_num=1, h_dim=64, max_seq_len=64, num_heads=1, dropout_rate = 0.1,
+                 pixel_size = 3.6e-6):
+        super().__init__()
+        self.__dict__.update({k:v for k,v in locals().items() if k != 'self'})
+        self.sim_scores = omm.OpticalMul(
+                omm.Config(right_matrix_count_columns = max_seq_len,
+                            right_matrix_count_rows = h_dim // num_heads,
+                            right_matrix_width = pixel_size * max_seq_len,
+                            right_matrix_height = pixel_size * (h_dim // num_heads),
+                            min_height_gap = pixel_size,
+                            right_matrix_split_x = 2,
+                            right_matrix_split_y = 2,
+                            left_matrix_split_x = 2,
+                            left_matrix_split_y = 2,
+                            result_matrix_split = 2,
+                            distance = 0.01,
+                            trainable_cylind_lens=True)
+            )
+
+        self.sim_output = omm.OpticalMul(
+                omm.Config(right_matrix_count_columns = h_dim // num_heads,
+                            right_matrix_count_rows = max_seq_len,
+                            right_matrix_width = pixel_size * (h_dim // num_heads),
+                            right_matrix_height = pixel_size * max_seq_len,
+                            min_height_gap = pixel_size,
+                            right_matrix_split_x = 2,
+                            right_matrix_split_y = 2,
+                            left_matrix_split_x = 2,
+                            left_matrix_split_y = 2,
+                            result_matrix_split = 2,
+                            distance = 0.01,
+                            trainable_cylind_lens=True)
+            )
+        self.layers = nn.ModuleList([
+            TransformerLayer(h_dim=self.h_dim, sim_scores=self.sim_scores, sim_output=self.sim_output, num_heads=self.num_heads, 
+                dropout_rate=self.dropout_rate, max_seq_len=self.max_seq_len) 
+            for _ in range(layers_num)])
+        self.tok_embeds = nn.Embedding(vocab_size, h_dim)
+        self.pos_embeds = nn.Parameter(torch.randn(1, self.max_seq_len, h_dim))
+        self.lm_head = nn.Linear(h_dim, vocab_size)
+
+    def forward(self, x, targets=None):
+        x = self.tok_embeds(x) + self.pos_embeds[:, :x.shape[1], :]
+        for l in self.layers:
+            x = l(x)
+        logits = self.lm_head(x) # B,T,C
+        loss = F.cross_entropy(rearrange(logits, "b t c -> b c t"), targets) if not targets is None else None
+        return logits, loss
+
+    # what is the purpose? autoregressive inference!
+    def generate(self, start_idx, max_new_tokens):
+        idx = start_idx
+        for i in range(max_new_tokens):
+            idx_cond = idx[:,-self.max_seq_len:]
+            logits, loss = self(idx_cond)
+            logits = logits[:,-1,:] # B, C
+            probs = F.softmax(logits, dim=-1)
+            idx_next = torch.multinomial(probs, num_samples=1).to(self.lm_head.bias.device)
+            idx = torch.cat([idx, idx_next], dim=1)
+        return idx
\ No newline at end of file