Abstract
We demonstrate a compact 4×4 wavelength selective switch with 50% fewer electrical signal 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 possible to drive both microring resonators with the same voltage and separate control is not required if the fabrication variation reduces in the future.
Highlights
We proposed a multi-wavelength selective crossbar switch (MSCS) in [13]
Both chip1 and chip2 have switches where both rings in the cascaded MRR are driven by same signal pad.The orange lines correspond to the median loss
We report a compact switch with same drive for two cascaded MRRs
Summary
Citation: P. Khope, A.S.; Zhang, R.; Helkey, R.; Alferness, R.C.; Saleh, A.A.M.; Bowers, J.E. CompactWavelength Selective CrossbarSwitch with Cascaded First OrderMicro-Ring Resonators. Photonics2022, 9, 60. https://doi.org/10.3390/photonics9020060Received: 27 December 2021Accepted: 17 January 2022Published: 24 January 2022Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.
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