High-power sub-kHz linewidth lasers fully integrated on silicon

By Duanni Huang, M. Tran, Joel Guo, Jon Peters, T. Komljenovic, Aditya Malik, P. Morton, John E. Bowers. Optica, 2019

138 citations recorded by the source corpus.

We demonstrate a fully integrated extended distributed Bragg reflector (DBR) laser with ∼1  kHz linewidth and over 37 mW output power, as well as a ring-assisted DBR laser with less than 500 Hz linewidth. The extended DBR lasers are fabricated by heterogeneously integrating III-V material on Si as a gain section plus a 15 mm long, low-kappa Bragg grating reflector in an ultralow-loss silicon waveguide. The low waveguide loss (0.16 dB/cm) and long Bragg grating with narrow bandwidth (2.9 GHz) are essential to reducing the laser linewidth while maintaining high output power and single-mode operation. The combination of narrow linewidth and high power enable its use in coherent communications, RF photonics, and optical sensing.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/140707b7daf8beae8bf325863d55890addd58a0e