利用分子束外延技术在GaAs（100）衬底上生长了1.3 μm InAs DWELL量子点激光器结构，研究了有源区Be掺杂对量子点激光器性能的影响。研究表明，对有源区进行Be掺杂可以有效降低InAs量子点激光器的阈值电流密度，提升激光器的输出功率，增加激光器的温度稳定性。研制的Be掺杂InAs量子点激光器的阈值电流降低到12 mA，相应的阈值电流密度仅为100 A/cm²，激光器的最高输出功率达到183 mW，最高工作温度达到了130 ℃。这对InAs量子点激光器器件在光通信系统中的应用具有重要意义。

We report the InAs/GaAs quantum dot laterally coupled distributed feedback (LC-DFB) lasers operating at room temperature in the wavelength range of 1.31 µm. First-order chromium Bragg gratings were fabricated alongside the ridge waveguide to obtain the maximum coupling coefficient with the optical field. Stable continuous-wave single-frequency operation has been achieved with output power above 5 mW/facet and side mode suppression ratio exceeding 52 dB. Moreover, a single chip integrating three LC-DFB lasers was tentatively explored. The three LC-DFB lasers on the chip can operate in single mode at room temperature, covering the wavelength span of 35.6 nm.