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Optical Engineering

Optimal detuning combinations in a series coupled silicon micro ring resonator thermo optic-wavelength selective switch
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Paper Abstract

Series coupled triple ring resonators are designed and fabricated on a SOI platform as a thermo-optic wavelength selective switch (TO-WSS) having individual ring resonance tunability and narrow band, flat-top spectrum with high channel isolation. Optimal detuning combinations of the ring resonators are identified in the WSS to achieve an effective OFF state with high channel extinction, low switching cross talk, and low loss of OFF state. It is observed that detuned OFF states with a single ring which is adjacent to the input bus waveguide and two rings which are adjacent to the drop waveguide, are more effective for the highest channel extinction, lowest switching cross talk, and zero loss of OFF state in the WSS. A maximum channel extinction of 22 dB, lowest switching cross talk of −30  dB, and a zero loss of OFF state is achieved with a single ring detuned OFF state using a switching power of 48 mW.

Paper Details

Date Published: 16 April 2012
PDF: 7 pages
Opt. Eng. 51(4) 044604 doi: 10.1117/1.OE.51.4.044604
Published in: Optical Engineering Volume 51, Issue 4
Show Author Affiliations
Patinharekandy Prabhathan, Nanyang Technological Univ. (Singapore)
Vadakke M. Murukeshan, Nanyang Technological Univ. (Singapore)
Jing Zhang, A*STAR Institute of Microelectronics (Singapore)

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