title: On-chip quasi-digital optical switch using silicon microring resonator-coupled Mach-Zehnder interferometer.
abstract: In this work, we demonstrate thermo-optical quasi-digital optical switch (q-DOS) using silicon microring resonator-coupled Mach-Zehnder interferometer. The optical transmission spectra show box-like response with 1-dB and 3-dB bandwidths of ~1.3 nm and ~1.6 nm, respectively. Such broadband flat-top optical response improves the tolerance to the light source wavelength fluctuation of ± 6 Å and temperature variation of ± 6 °C. Dynamic characterizations show the device with switching power of ~37 mW, switching time of ~7 μs, and on/off ratio of > 30 dB. For performance comparison, we also demonstrate a carrier injection-based electro-optical q-DOS by integrating lateral P-i-N junction with the microring resonator, which significantly reduces power consumption to ~12 mW and switching time to ~0.7 ns only.
authors.affiliation: Institute of Microelectronics, Agency for Science, Technology and Research, 11 Science Park Road, Science Park II, Singapore 117685, Singapore.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Song
authors.forename: Xianshu
authors.initials: X
authors.lastname: Luo
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Tu
authors.forename: Lianxi
authors.initials: L
authors.lastname: Jia
authors.forename: Qing
authors.initials: Q
authors.lastname: Fang
authors.forename: Tsung-Yang
authors.initials: TY
authors.lastname: Liow
authors.forename: Mingbin
authors.initials: M
authors.lastname: Yu
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Lo
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008904:Miniaturization; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D012825:Silicon / Q000737:chemistry*
chemical_list: D012825:Silicon