4 &#215; 4 nonblocking optical switch fabric based on cascaded multimode interferometers

Zuxiang Li; Linjie Zhou; Liangjun Lu; Shuoyi Zhao; Dong Li; Jianping Chen

doi:10.1364/prj.4.000021

Journals >Photonics Research >Volume 4 >Issue 1 >Page 0021 > Article

Photonics Research
Vol. 4, Issue 1, 0021 (2016)

4 × 4 nonblocking optical switch fabric based on cascaded multimode interferometers

Zuxiang Li, Linjie Zhou^*, Liangjun Lu, Shuoyi Zhao, Dong Li, and Jianping Chen

Author Affiliations

State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of ElectronicEngineering, Shanghai Jiao Tong University, Shanghai 200240, China

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DOI: 10.1364/prj.4.000021 Cite this Article Set citation alerts

Zuxiang Li, Linjie Zhou, Liangjun Lu, Shuoyi Zhao, Dong Li, Jianping Chen. 4 × 4 nonblocking optical switch fabric based on cascaded multimode interferometers[J]. Photonics Research, 2016, 4(1): 0021 Copy Citation Text

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(a) Structure of the 4×4 switch based on cascaded GMZIs. (b) All switching states of single 4×4, 3×3, and 2×2 GMZIs. (c) Cross-sectional schematic of the TO phase shifter.

Fig. 1. (a) Structure of the 4×4 switch based on cascaded GMZIs. (b) All switching states of single 4×4, 3×3, and 2×2 GMZIs. (c) Cross-sectional schematic of the TO phase shifter.

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Fig. 2. (a) Optical microscope image of the fabricated 4×4 switch. (b) Zoom-in view of the GMZI switch element. (c) Home-packaged switch chip.

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Fig. 3. Measured transmission spectra for state ID=3.

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Fig. 4. Measured transmission spectra for state ID=22.

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Fig. 5. Histogram of on-chip insertion loss of all 24 states.

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Fig. 6. Histogram of cross talk of all 24 states.

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Fig. 7. Experimental setup for optical data transmission measurement.

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Fig. 8. Measured eye diagrams of a 25 Gb/s OOK signal before and after the switch chip. (a) BtB transmission, (b) switching state ID=3, and (c) switching state ID=22.

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Fig. 9. Tolerance analysis of power imbalance of the 4×4 and 3×3 MMIs on the cross talk of the device. The triangle represents the simulation of our fabricated device.

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State ID	GM4	GM3	GM2	$O_{1}$	$O_{2}$	$O_{3}$	$O_{4}$	TO Power
1	3	1	0	$I_{3}$	$I_{4}$	$I_{2}$	$I_{1}$	102.31
2	3	1	1	$I_{4}$	$I_{3}$	$I_{2}$	$I_{1}$	124.69
3	3	2	0	$I_{4}$	$I_{2}$	$I_{3}$	$I_{1}$	107.64
4	3	2	1	$I_{2}$	$I_{4}$	$I_{3}$	$I_{1}$	126.96
5	3	3	0	$I_{2}$	$I_{3}$	$I_{4}$	$I_{1}$	107.64
6	3	3	1	$I_{3}$	$I_{2}$	$I_{4}$	$I_{1}$	124.26
7	4	1	0	$I_{1}$	$I_{3}$	$I_{4}$	$I_{2}$	78.73
8	4	1	1	$I_{3}$	$I_{1}$	$I_{4}$	$I_{2}$	101.11
9	4	2	0	$I_{3}$	$I_{4}$	$I_{1}$	$I_{2}$	84.06
10	4	2	1	$I_{4}$	$I_{3}$	$I_{1}$	$I_{2}$	103.38
11	4	3	0	$I_{4}$	$I_{1}$	$I_{3}$	$I_{2}$	81.36
12	4	3	1	$I_{1}$	$I_{4}$	$I_{3}$	$I_{2}$	96.34
13	1	1	0	$I_{4}$	$I_{2}$	$I_{1}$	$I_{3}$	72.16
14	1	1	1	$I_{2}$	$I_{4}$	$I_{1}$	$I_{3}$	94.67
15	1	2	0	$I_{2}$	$I_{1}$	$I_{4}$	$I_{3}$	62.23
16	1	2	1	$I_{1}$	$I_{2}$	$I_{4}$	$I_{3}$	77.21
17	1	3	0	$I_{1}$	$I_{4}$	$I_{2}$	$I_{3}$	62.29
18	1	3	1	$I_{4}$	$I_{1}$	$I_{2}$	$I_{3}$	77.27
19	2	1	0	$I_{2}$	$I_{1}$	$I_{3}$	$I_{4}$	123.53
20	2	1	1	$I_{1}$	$I_{2}$	$I_{3}$	$I_{4}$	145.91
21	2	2	0	$I_{1}$	$I_{3}$	$I_{2}$	$I_{4}$	122.75
22	2	2	1	$I_{3}$	$I_{1}$	$I_{2}$	$I_{4}$	142.07
23	2	3	0	$I_{3}$	$I_{2}$	$I_{1}$	$I_{4}$	126.16
24	2	3	1	$I_{2}$	$I_{3}$	$I_{1}$	$I_{4}$	141.14