Jiang Chun, Chen Quanan, Wang Kuankuan, Lu Qiaoyin, Lu Mingzhi, Guo Weihua
Opt Express. 2021 Apr 26;29(9):13246-13255. doi: 10.1364/OE.422194.
A narrow-linewidth thermally tuned multi-channel interference (MCI) laser integrated with a semiconductor optical amplifier (SOA) and spot size converter (SSC) is demonstrated in this paper. A MCI laser integrated with SOA through chirped grating is successfully realized for the first time, which achieves a tuning range of more than 42.5 nm with side-mode suppression ratios (SMSRs) higher than 48 dB and Lorentzian linewidth below 100 kHz. InGaAlAs multiple quantum wells (MQWs) and thermal tuning are used to reduce linewidth. The integration of SSC greatly improves the coupling efficiency between the laser and a lensed fiber. The MCI laser integrated with SSC achieves more than 16 dBm output power coupled into a lensed fiber. Air layers are fabricated in the phase sections to increase the heating efficiency. The total thermal tuning power is below 20 mW across the whole tuning range.
本文展示了一种集成半导体光放大器（SOA）和光斑尺寸转换器（SSC）的窄线宽热调谐多通道干涉（MCI）激光器。首次成功实现了通过啁啾光栅与SOA集成的MCI激光器，其调谐范围超过42.5 nm，边模抑制比（SMSR）高于48 dB，洛伦兹线宽低于100 kHz。采用InGaAlAs多量子阱（MQW）和热调谐来减小线宽。SSC的集成大大提高了激光器与透镜光纤之间的耦合效率。集成SSC的MCI激光器耦合到透镜光纤中的输出功率超过16 dBm。在相位部分制作空气层以提高加热效率。在整个调谐范围内，总热调谐功率低于20 mW。
