Chen Quanan, Wang Kuankuan, Jiang Chun, Ma Xiang, Liu Ye, Lu Qiaoyin, Guo Weihua
Opt Express. 2021 Mar 1;29(5):6344-6355. doi: 10.1364/OE.414376.
A multi-channel interference (MCI) widely tunable semiconductor laser is described in detail with improved performance in this paper. The MCI laser without the common phase section was packaged into a standard 14-pin butterfly package. The device realized a tuning range of more than 40 nm with side mode suppression ratios (SMSRs) higher than 48 dB and about 7 dBm fiber power. By making the gain section and the phase sections to be surface ridge waveguides, threshold currents of the laser have become less than 18 mA across the tuning range. Besides, tuning characteristics of the MCI laser were experimentally studied in detail for the first time. The MCI laser can be treated as a combination of eight Fabry-Pérot (FP) cavity lasers which share the same gain section. It is found that when the eight arm phase sections are completely in phase at the lasing wavelength, the operating currents are at maxima of the output power curves. The relationship between the lasing wavelength and the injection currents of the eight arm phase sections has been introduced and analyzed.
本文详细描述了一种具有改进性能的多通道干涉（MCI）宽可调谐半导体激光器。没有公共相位段的MCI激光器被封装在标准的14引脚蝶形封装中。该器件实现了超过40 nm的调谐范围，边模抑制比（SMSR）高于48 dB，光纤功率约为7 dBm。通过使增益段和相位段成为表面脊形波导，激光器在整个调谐范围内的阈值电流已小于18 mA。此外，首次对MCI激光器的调谐特性进行了详细的实验研究。MCI激光器可被视为八个共享相同增益段的法布里 - 珀罗（FP）腔激光器的组合。研究发现，当八个臂的相位段在激射波长处完全同相时，工作电流处于输出功率曲线的最大值。介绍并分析了激射波长与八个臂相位段注入电流之间的关系。
