1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
#include <mesh_col.h>
#define __modname(SUFFIX, IDX) \
((""s + this->name() + "_" + SUFFIX + to_string(IDX)).c_str())
void MeshCol::init_ports()
{
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
// Initializing optical input ports
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
p_in.clear();
for(size_t i = 0; i < m_N; i++)
{
p_in.push_back(make_unique<spx::oa_port_in_type>(__modname("IN_", i)));
}
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
// Initializing optical output ports
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
p_out.clear();
for(size_t i = 0; i < m_N; i++)
{
p_out.push_back(make_unique<spx::oa_port_out_type>(__modname("OUT_", i)));
}
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
// Initializing electrical input ports
// --------------------------------------------------------------------------//
// --------------------------------------------------------------------------//
p_vphi.clear();
p_vtheta.clear();
size_t num_of_electrical_ports = m_N/2;
if ((m_N % 2 == 0) && !(m_j % 2 == 0)) // if even-odd, there is one less MZI
num_of_electrical_ports = m_N/2 - 1;
for(size_t i = 0; i < num_of_electrical_ports; i++)
{
p_vphi.push_back(make_unique<sc_in<double>>(__modname("VPHI_", i)));
p_vtheta.push_back(make_unique<sc_in<double>>(__modname("VTHETA_", i)));
}
}
void MeshCol::init()
{
if (m_N % 2 == 0)
{
if (m_j % 2 == 0)
init_N_even_j_even();
else
init_N_even_j_odd();
}
else
{
if (m_j % 2 == 0)
init_N_odd_j_even();
else
init_N_odd_j_odd();
}
}
/*
For N=4 that's how it looks
0__ __0
\/
1__/\__1
2__ __2
\/
3__/\__3
TODO: snap to 2pi phase instead of setting neff = 0
*/
void MeshCol::init_N_even_j_even()
{
for(size_t i = 0; i < m_N/2; i++)
{
m_mzi.push_back(make_unique<MZI>(__modname("MZI_", i),
m_length_cm, m_attenuation_wg_dB_cm,
m_attenuation_coupler_dB, m_attenuation_ps_dB,
m_neff, m_ng));
m_mzi[i]->p_in1(*p_in[2*i]);
m_mzi[i]->p_in2(*p_in[2*i+1]);
m_mzi[i]->p_out1(*p_out[2*i]);
m_mzi[i]->p_out2(*p_out[2*i+1]);
m_mzi[i]->p_vphi(*p_vphi[i]);
m_mzi[i]->p_vtheta(*p_vtheta[i]);
m_mzi[i]->init();
}
}
/* For N=4 that's how it looks
0______0
1__ __1
\/
2__/\__2
3______3
The empty rows have a waveguide that adds zero phase
but can have loss and time delay.
TODO: snap to 2pi phase instead of setting neff = 0
*/
void MeshCol::init_N_even_j_odd()
{
assert(m_N >= 4);
// Zero neff so it doesn't add any phase
m_wg.push_back(make_unique<Waveguide>(__modname("WG_", 0),
m_length_cm, m_attenuation_wg_dB_cm,
m_neff, m_ng));
m_wg[0]->p_in(*p_in[0]);
m_wg[0]->p_out(*p_out[0]);
for(size_t i = 1; i <= m_N/2 - 1; i++)
{
m_mzi.push_back(make_unique<MZI>(__modname("MZI_", i),
m_length_cm, m_attenuation_wg_dB_cm,
m_attenuation_coupler_dB, m_attenuation_ps_dB,
m_neff, m_ng));
m_mzi[i - 1]->p_in1(*p_in[2 * i - 1]);
m_mzi[i - 1]->p_in2(*p_in[2 * i]);
m_mzi[i - 1]->p_out1(*p_out[2 * i - 1]);
m_mzi[i - 1]->p_out2(*p_out[2 * i]);
m_mzi[i - 1]->p_vphi(*p_vphi[i - 1]);
m_mzi[i - 1]->p_vtheta(*p_vtheta[i - 1]);
m_mzi[i - 1]->init();
}
// Zero neff so it doesn't add any phase
m_wg.push_back(make_unique<Waveguide>(__modname("WG_", 1),
m_length_cm, m_attenuation_wg_dB_cm,
m_neff, m_ng));
m_wg[1]->p_in(*p_in[m_N-1]);
m_wg[1]->p_out(*p_out[m_N-1]);
}
/* For N=5 that's how it looks
0__ __0
\/
1__/\__1
2__ __2
\/
3__/\__3
4______4
The empty rows have a waveguide that adds zero phase
but can have loss and time delay.
TODO: snap to 2pi phase instead of setting neff = 0
*/
void MeshCol::init_N_odd_j_even()
{
cout << "odd-even" << endl;
for(size_t i = 0; i < m_N/2; i++)
{
m_mzi.push_back(make_unique<MZI>(__modname("MZI_", i),
m_length_cm, m_attenuation_wg_dB_cm,
m_attenuation_coupler_dB, m_attenuation_ps_dB,
m_neff, m_ng));
m_mzi[i]->p_in1(*p_in[2*i]);
m_mzi[i]->p_in2(*p_in[2*i+1]);
m_mzi[i]->p_out1(*p_out[2*i]);
m_mzi[i]->p_out2(*p_out[2*i+1]);
m_mzi[i]->p_vphi(*p_vphi[i]);
m_mzi[i]->p_vtheta(*p_vtheta[i]);
m_mzi[i]->init();
}
// Zero neff so it doesn't add any phase
m_wg.push_back(make_unique<Waveguide>(__modname("WG_", 0),
m_length_cm, m_attenuation_wg_dB_cm,
m_neff, m_ng));
m_wg[0]->p_in(*p_in[m_N-1]);
m_wg[0]->p_out(*p_out[m_N-1]);
}
/* For N=5 that's how it looks
0______0
1__ __1
\/
2__/\__2
3__ __3
\/
4__/\__4
The empty rows have a waveguide that adds zero phase
but can have loss and time delay.
TODO: snap to 2pi phase instead of setting neff = 0
*/
void MeshCol::init_N_odd_j_odd()
{
cout << "odd-odd" << endl;
// Zero neff so it doesn't add any phase
m_wg.push_back(make_unique<Waveguide>(__modname("WG_", 0),
m_length_cm, m_attenuation_wg_dB_cm,
m_neff, m_ng));
m_wg[0]->p_in(*p_in[0]);
m_wg[0]->p_out(*p_out[0]);
for(size_t i = 1; i <= m_N/2; i++)
{
m_mzi.push_back(make_unique<MZI>(__modname("MZI_", i),
m_length_cm, m_attenuation_wg_dB_cm,
m_attenuation_coupler_dB, m_attenuation_ps_dB,
m_neff, m_ng));
m_mzi[i - 1]->p_in1(*p_in[2 * i - 1]);
m_mzi[i - 1]->p_in2(*p_in[2 * i]);
m_mzi[i - 1]->p_out1(*p_out[2 * i - 1]);
m_mzi[i - 1]->p_out2(*p_out[2 * i]);
m_mzi[i - 1]->p_vphi(*p_vphi[i - 1]);
m_mzi[i - 1]->p_vtheta(*p_vtheta[i - 1]);
m_mzi[i - 1]->init();
}
}
|
