Affiliation:
1. University of Chinese Academy of Sciences
2. Weifang Academy of Advanced Opto-Electronic Circuits
Abstract
An O-band monolithically integrated four-channel laser array based on
high-order surface gratings is demonstrated. The fabricated laser
array exhibits a wide bandwidth of up to 60 nm, with threshold
currents ranging from 17 to 25 mA and slope efficiencies
between 0.22 and 0.29 W/A. At an injection current of
200 mA, all side-mode suppression ratios (SMSRs) are above
40 dB, and the output power exceeds 36 mW. The
high-order surface gratings are fabricated by standard lithography,
which avoids high-precision lithography and a complex regrowth
technique. A potentially cost-effective light source for coarse
wavelength division multiplexing (CWDM) systems is provided.
Funder
National Key Research and Development
Program of China