Optical cross-connect circuit using hitless wavelength selective switch.
We have proposed and demonstrated the basic elements of a full matrix optical switching circuit (cross-connect circuit) using a hitless wavelength selective switch (WSS). The cross-connect circuits are made of a multi-wavelength channel selective switch consisting of cascaded hitless WSSs, and a multi-port switch. These switching elements are realized through the individual Thermo-Optic (TO) tuning of a series-coupled microring resonator, and can switch arbitrary wavelength channels without blocking other wavelength channels during tuning. We demonstrate a four wavelength selective switch using a parallel topology of double series coupled microring resonators and a three wavelength selective switch using a parallel topology of quadruple series coupled microring resonators. Since the spectrum shape of quadruple series coupled microring is much more box-like than the double series, a high extinction ratio of 39.0-46.6 dB and low switching cross talk of 19.3-24.5 dB were achieved.
Department of Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan.
Yuta
Y
Goebuchi
Masahiko
M
Hisada
Tomoyuki
T
Kato
Yasuo
Y
Kokubun
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055095:Optics and Photonics / Q000295:instrumentation*; D010865:Pilot Projects; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*