DFB laser array based on four phase-shifted sampled Bragg gratings with precise wavelength control
Author(s): Sun, YM (Sun, Yiming); Yuan, BC (Yuan, Bocheng); Sun, X (Sun, Xiao); Liang, S (Liang, Song); Huang, YG (Huang, Yongguang); Zhang, RK (Zhang, Ruikang); Ye, SW (Ye, Shengwei); Fan, YZ (Fan, Yizhe); Cheng, WQ (Cheng, Weiqing); Marsh, JH (Marsh, John H.); Hou, LP (Hou, Lianping)
Source: OPTICS LETTERS Volume: 47 Issue: 23 Pages: 6237-6240 DOI: 10.1364/OL.475909 Published: DEC 1 2022
Abstract: A four-laser array based on sampled Bragg grating distributed feedback (DFB) lasers in which each sampled period contains four phase-shift sections is proposed, fabricated, and experimentally demonstrated. The wavelength spacing between adjacent lasers is accurately controlled to 0.8nm +/- 0.026nm and the lasers have single mode suppression ratios larger than 50 dB. Using an integrated semiconductor optical amplifier, the output power can reach 33mW and the optical linewidth of the DFB lasers can be as narrow as 64 kHz. This laser array uses a ridge waveguide with sidewall gratings and needs only onemetalorganic vapor-phase epitaxy (MOVPE) step and one III-V material etching process, simplifying the whole device fabrication process, and meeting the requirements of dense wavelength division multiplexing systems.
Accession Number: WOS:000926187200027