Low-Loss Reconfigurable Non-Blocking Optical Switching Network Based on Phase-Change Materials

Yuting Xiong; Pengxing Guo; Jiahao Zhou; Weigang Hou; Lei Guo

doi:10.3788/AOS240597

Acta Optica Sinica, Volume. 44, Issue 11, 1106007(2024)

Low-Loss Reconfigurable Non-Blocking Optical Switching Network Based on Phase-Change Materials

Yuting Xiong^1,2, Pengxing Guo^1,2、*, Jiahao Zhou^1,2, Weigang Hou^1,2, and Lei Guo^1,2

¹School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

²Institute of Intelligent Communication and Network Security, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

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Figures & Tables(10)

$Schematic diagram of structure and function of Sb2Se3-MZI based 2×2 optical switch. (a) Structure diagram; (b) bar-state diagram; (c) cross-state diagram; (d) waveguide cross-section; (e) complex refractive index of Sb2Se3 at different wavelengths; (f) field intensity distribution of Sb2Se3-Si waveguide$

Fig. 1. Schematic diagram of structure and function of Sb₂Se₃-MZI based 2×2 optical switch. (a) Structure diagram; (b) bar-state diagram; (c) cross-state diagram; (d) waveguide cross-section; (e) complex refractive index of Sb₂Se₃ at different wavelengths; (f) field intensity distribution of Sb₂Se₃-Si waveguide

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Fig. 2. Parameter optimization results of Sb₂Se₃-MZI-based 2×2 optical switch. (a) Filed intensity distribution of directional coupler; (b) transmittance of output port varies with length of Sb₂Se₃ film; (c) filed intensity distribution of I₁-O₂ transmission; (d) filed intensity distribution of I₂-O₁ transmission; (e) filed intensity distribution of I₁-O₁transmission; (f) filed intensity distribution of I₂-O₂ transmission

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Fig. 3. Schematic diagram of Sb₂Se₃-MZI-based 8×8 reconfigurable non-blocking optical switching network

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Fig. 4. Crossing waveguide. (a) Schematic diagram of crossing waveguide structure and filed intensity distribution; (b) optimize the iterative process and optimal parameter results

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Fig. 5. Insertion loss and crosstalk noise for different switching paths in single input state

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Fig. 6. Insertion loss of each output port of switching network under multi-input states

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Fig. 7. Eye diagram of data transmission from I₁ to O₁, O₂, …, O₈ under 25 Gbit/s transmission rate

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Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I₁, I₂and output from ports O₁, O₂, …, O₈

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Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I₁, I₂and output from ports O₁, O₂, …, O₈

Input port-output port	2×2 optical switch unit M_（1，1）…M_（4，5）	Input port-output port	2×2 optical switch unit M_（1，1）…M_（4，5）
I₁-O₁	11111000000000000000	I₂-O₁	01111000000000000000
I₁-O₂	11110000000000000000	I₂-O₂	01110000000000000000
I₁-O₃	11100000010000000000	I₂-O₃	01100000010000000000
I₁-O₄	11100000000000000000	I₂-O₄	01100000000000000000
I₁-O₅	10000000000000100000	I₂-O₅	00000000000000100000
I₁-O₆	10000000000000000000	I₂-O₆	00000000000000000000
I₁-O₇	00001000000000000000	I₂-O₇	00000000100000000001
I₁-O₈	00000000000000000011	I₂-O₈	00000000100000000000

Table 2. State of each 2×2 optical switching unit in switching network in multi-input states

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Table 2. State of each 2×2 optical switching unit in switching network in multi-input states

State	Output ports corresponding to input ports I₁I₂I_3…I₈	2×2 optical switch unit M_（1，1）…M_（1，5）M_{（2，1）...}M_（4，5）	Maximum IL /dB
1	O₁O₂O₃O₄O₅O₆O₇O₈	00100001000010000100	0.642
2	O₁O₂O₃O₅O₄O₆O₇O₈	00000011101010101110	0.666
3	O₁O₂O₆O₅O₄O₃O₇O₈	00000111101000001110	0.683
4	O₁O₇O₆O₅O₄O₃O₂O₈	11111100010000001010	0.683
5	O₈O₇O₆O₅O₄O₃O₂O₁	00011000110001100011	0.754

Table 3. Performance comparison between 8×8 optical switching network in proposed and conventional optical switching network

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Table 3. Performance comparison between 8×8 optical switching network in proposed and conventional optical switching network

Switching element	Insertion loss /dB	Crosstalk noise /dB	Footprint /（mm×mm）	Architecture
TO-dual MZI^［16］	3.200	-20.00	7.70×1.70	PILOSS
TO-dual MRR^［17］	4.400-9.600	-16.75	2.00×2.00	Omega
TO-MZI^［18］	2.700	—	—	Banyan
2nd-order MRR^［19］	0.520-2.660	—	3.32×3.62	Crossbar
Sb₂Se₃-MZI （in proposed）	0.296-0.462	-49.60	2.50×1.00	Benes

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Yuting Xiong, Pengxing Guo, Jiahao Zhou, Weigang Hou, Lei Guo. Low-Loss Reconfigurable Non-Blocking Optical Switching Network Based on Phase-Change Materials[J]. Acta Optica Sinica, 2024, 44(11): 1106007

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Paper Information

Category: Fiber Optics and Optical Communications

Received: Jan. 31, 2024

Accepted: Mar. 11, 2024

Published Online: Jun. 7, 2024

The Author Email: Guo Pengxing (guopx@cqupt.edu.cn)

DOI:10.3788/AOS240597

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I1, I2 and output from ports O1, O2, …, O8

Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I1, I2 and output from ports O1, O2, …, O8

Table 2. State of each 2×2 optical switching unit in switching network in multi-input states

Table 2. State of each 2×2 optical switching unit in switching network in multi-input states

Table 3. Performance comparison between 8×8 optical switching network in proposed and conventional optical switching network

Table 3. Performance comparison between 8×8 optical switching network in proposed and conventional optical switching network

Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I₁, I₂and output from ports O₁, O₂, …, O₈

Table 1. State of each 2×2 optical switch unit when light enters switching network from ports I₁, I₂and output from ports O₁, O₂, …, O₈