报道了InGaAs/GaAs/InGaP量子阱激光器的激光光谱研究,并在法布里-珀罗(FP)腔激光器中发现了单模工作特性,且该单模工作特性可以在较大的工作电流范围内(36~68 mA)存在,在一定的电流(14 mA)范围内保持单模可调谐。在20 ℃,当器件注入电流为62 mA时,激光器单模工作情况下的最大边模抑制比(SMSR)为29.8 dB,在其他电流条件下该器件的边模抑制比也都大于20 dB。激光器在单模工作时,器件最大输出功率(单面)达到12.5 mW。对于具有相同结构和材料的FP腔激光器来说,在不同条宽或腔长的器件中都观察到上述单模工作特性。这一特性在一些单频激光的应用系统中具有较大的应用价值。

In this study, we investigate the laser spectra of the InGaAs/GaAs/InGaP quantum well lasers. Single-mode operation characteristics can be observed in the Fabry-Perot (FP) cavity laser, which exist in a large operating current range (36-68 mA). Mode-hop free wavelength tuning can be observed at a current of 14 mA. The maximum side-mode suppression ratio (SMSR) under single-mode operation of the laser is 29.8 dB at 20 ℃ with an injection current of 62 mA, while SMSR values are generally greater than 20 dB under other injection currents. Furthermore, the maximum output power (single side) of the laser under single-mode operation reaches 12.5 mW. Accordingly, the aforementioned single-mode operation characteristics can be observed for the FP cavity lasers fabricated with similar structures and materials in devices exhibiting different strip widths and cavity lengths. This unique feature results in considerable application potential in applications requiring a single-frequency laser source.