Experimental demonstration of a flexible-grid 1×2 wavelength-selective switch based on silicon microring resonators

Weiwei Chen; Hao Lu; Shiqi Li; Pengjun Wang; Shixun Dai; Tianjun Yang; Bohao Zhang; Ruolan Yu; Qiang Fu; Jun Li; Yan Li; Tingge Dai; Yuehai Wang; Jianyi Yang

doi:10.1364/OL.44.000403

Optics Letters
Vol. 44,
Issue 2,
pp. 403-406
(2019)
•https://doi.org/10.1364/OL.44.000403

Experimental demonstration of a flexible-grid 1×2 wavelength-selective switch based on silicon microring resonators

Weiwei Chen, Hao Lu, Shiqi Li, Pengjun Wang, Shixun Dai, Tianjun Yang, Bohao Zhang, Ruolan Yu, Qiang Fu, Jun Li, Yan Li, Tingge Dai, Yuehai Wang, and Jianyi Yang

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Weiwei Chen, Hao Lu, Shiqi Li, Pengjun Wang, Shixun Dai, Tianjun Yang, Bohao Zhang, Ruolan Yu, Qiang Fu, Jun Li, Yan Li, Tingge Dai, Yuehai Wang, and Jianyi Yang, "Experimental demonstration of a flexible-grid 1×2 wavelength-selective switch based on silicon microring resonators," Opt. Lett. 44, 403-406 (2019)

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- Optical Devices
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About this Article
History
- Original Manuscript: October 8, 2018
- Revised Manuscript: November 30, 2018
- Manuscript Accepted: November 30, 2018
- Published: January 14, 2019

Abstract

An integrated flexible-grid $1 \times 2$ wavelength-selective switch based on reconfigurable add–drop silicon microring resonators using strip waveguides is designed and experimentally demonstrated. By flexibly tuning the resonance of microring resonators and path phase differences via the thermo-optic effect, the transmission spectra with adjustable bandwidths can be formed as desired at the output ports. Our experimental results reveal that the fabricated flexible-grid $1 \times 2$ wavelength-selective switch provides crosstalk lower than $- 10.39 dB$ . The 3-dB bandwidth varies from 0.38 nm to 1 nm, the in-band ripple is less than 0.52 dB, and the response time is about 17.6 μs.

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States	Output Signals	Output Ports	MRRs Turned On
1	$λ_{1} / λ_{2} \sim λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{8}, R_{9}$
2	$λ_{2} \sim λ_{3} / λ_{1}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{5}, R_{6}, R_{7}$
3	$λ_{1} \sim λ_{2} / λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{5}, R_{9}$
4	$λ_{3} / λ_{1} \sim λ_{2}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{6}, R_{7}, R_{8}$
5	$λ_{1}, λ_{3} / λ_{2}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{6}, R_{8}$
6	$λ_{2} / λ_{1}, λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{5}, R_{7}, R_{9}$
7	$λ_{1} \sim λ_{3} / null$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{5}, R_{6}$
8	$null / λ_{1} \sim λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{7}, R_{8}, R_{9}$

States	Max CT (dB)	Max IL (dB)	PC (mW)
1	−10.39	7.02	299.5
2	−14.59	9.08	306.5
3	−20.64	2.92	301.5
4	−16.27	5.10	306.1
5	−14.39	8.22	301.4
6	−20.75	6.63	306.2
7	−18.66	4.68	303.4
8	−20.34	4.71	304.2

States	Output Signals	Output Ports	MRRs Turned On
1	$λ_{1} / λ_{2} \sim λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{8}, R_{9}$
2	$λ_{2} \sim λ_{3} / λ_{1}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{5}, R_{6}, R_{7}$
3	$λ_{1} \sim λ_{2} / λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{5}, R_{9}$
4	$λ_{3} / λ_{1} \sim λ_{2}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{6}, R_{7}, R_{8}$
5	$λ_{1}, λ_{3} / λ_{2}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{6}, R_{8}$
6	$λ_{2} / λ_{1}, λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{5}, R_{7}, R_{9}$
7	$λ_{1} \sim λ_{3} / null$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{4}, R_{5}, R_{6}$
8	$null / λ_{1} \sim λ_{3}$	${Output}_{1} / {Output}_{2}$	$R_{1}, R_{2}, R_{3}, R_{7}, R_{8}, R_{9}$

States	Max CT (dB)	Max IL (dB)	PC (mW)
1	−10.39	7.02	299.5
2	−14.59	9.08	306.5
3	−20.64	2.92	301.5
4	−16.27	5.10	306.1
5	−14.39	8.22	301.4
6	−20.75	6.63	306.2
7	−18.66	4.68	303.4
8	−20.34	4.71	304.2

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Equations (5)

Optics Letters