Compact Wavelength Selective Crossbar Switch with Cascaded First Order Micro-Ring Resonators

Akhilesh S. P. Khope; Robert Zhang; Roger Helkey; Rod C Alferness; Adel A. M. Saleh; John E Bowers

doi:10.20944/preprints202106.0426.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 12 June 2021 / Approved: 16 June 2021 / Online: 16 June 2021 (08:45:23 CEST)

We demonstrate a compact 4x4 wavelength selective switch with 50 % fewer electrical pads as compared with our previous generation. We report loss and crosstalk for different paths of the switch. We measure median loss of 5.32 dB and worst case crosstalk of -35 dB. The microring resonators tune by more than one free spectral range, which is an improvement over our previous generation of switches. This switch can support 8 channels at 400 GHz spacing. We conclude that it is not possible to drive both microring resonators with the same voltage and separate control is required because of fabrication variation of the current technology.

Switching; Photonic Integrated Circuits; Optical Switching Devices

Physical Sciences, Optics and Photonics

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Compact Wavelength Selective Crossbar Switch with Cascaded First Order Micro-Ring Resonators

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