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

• DOI: 10.1364/optica.6.000745
• Publication Date: 2019-05-29T15:13:00Z
• Authors: Duanni Huang; Minh A. Tran; Joel Guo; Jonathan Peters; Tin Komljenovic; Aditya Malik; Paul A. Morton; John E. Bowers
• Keywords: Laser linewidth; Fiber Bragg Grating

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