Wavelength-controlled external-cavity laser with a silicon photonic crystal resonant reflector

Abstract

We report the experimental demonstration of an alternative design of external-cavity hybrid lasers consisting of a III-V Semiconductor Optical Amplifier with fiber reflector and a Photonic Crystal (PhC) based resonant reflector on SOI. The Silicon reflector comprises a polymer (SU8) bus waveguide vertically coupled to a PhC cavity and provides a wavelength-selective optical feedback to the laser cavity. This device exhibits milliwatt-level output power and sidemode suppression ratio of more than 25 dB

Monolithically Integrable Si-Compatible Light Sources

“…Aside from the SRO-based LECs, there are very few reports on totally Si-compatible integrated photonic circuits, most of which use reverse biased PN junctions as the light source [7][8][9]. Other proposed solutions include the use of phosphorus doped germanium heterojunctions [10], the coupling to the photonic circuit of optical fibers pig-tailed to lasers [11], or the hybrid approximation, in which external nonsilicon sources such as III-V reflective semiconductor optical amplifiers (RSOAs) are used [12]. All the previous lack the possibility of taking advantage of the current techniques used for the massive production of silicon-integrated circuits (ICs).…”