Low-loss mode converter for coupling light into slotted photonic crystal waveguide

Xingyu Zhang; Harish Subbaraman; Amir Hosseini; Zeyu Pan; Hai Yan; Chi-jui Chung; Ray T. Chen

doi:10.1117/12.2076499

13 March 2015 Low-loss mode converter for coupling light into slotted photonic crystal waveguide

Xingyu Zhang, Harish Subbaraman, Amir Hosseini, Zeyu Pan, Hai Yan, Chi-jui Chung, Ray T. Chen

Proceedings Volume 9368, Optical Interconnects XV; 936807 (2015) https://doi.org/10.1117/12.2076499
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We design, fabricate and experimentally demonstrate a highly efficient adiabatic mode converter for coupling light into a silicon slot waveguide with a slot width as large as 320nm. This strip-to-slot mode converter is optimized to provide a measured insertion loss as low as 0.08dB. Our mode converter provides 0.1dB lower loss compared to a conventional V-shape mode converter. This mode converter is used to couple light into and out of a 320nm slot photonic crystal waveguide, and it is experimentally shown to improve the coupling efficiency up to 3.5dB compared to the V-shape mode converter, over the slow-light wavelength region.

Citation Download Citation

Xingyu Zhang, Harish Subbaraman, Amir Hosseini, Zeyu Pan, Hai Yan, Chi-jui Chung, and Ray T. Chen "Low-loss mode converter for coupling light into slotted photonic crystal waveguide", Proc. SPIE 9368, Optical Interconnects XV, 936807 (13 March 2015); https://doi.org/10.1117/12.2076499

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