Scientific Reports (Feb 2024)

Efficient, high-power, narrow-linewidth, continuous-wave quantum-dot semiconductor comb laser

  • Mikhail Buyalo,
  • Alexey Gubenko,
  • Sergey Mikhrin,
  • Vladimir Mikhrin,
  • Alexey R. Kovsh,
  • Ashok V. Krishnamoorthy

DOI
https://doi.org/10.1038/s41598-024-53609-9
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 9

Abstract

Read online

Abstract We report a continuous-wave, O-band quantum-dot semiconductor comb laser for WDM optical interconnects exhibiting a 2.2 THz optical bandwidth with up to 89 comb wavelengths spaced at 25 GHz, over 30% peak ex-facet electrical-to-optical power conversion efficiency, up to 270 mW of usable laser power, relative intensity noise below − 135 dB/Hz per individual mode, individual laser mode linewidth of 140 kHz, mode beating linewidths of 50 kHz across all modes, and stable far-field output with 75% coupling efficiency to PM fiber in a butterfly package.