多通道干涉大范围可调谐激光器

Multi-channel Interference Widely-tunable Laser

摘要:

多通道干涉(MCI)激光器是一种新型单片集成的大范围可调谐半导体激光器。它采用多臂干涉增强而无需光栅的选模方式,具有制作简单和容差大的优势；采用偏置量子阱技术进行有源无源集成,降低了二次外延的难度。为满足光通信不同场景的应用需求,分别设计研制了大范围可调的电调谐和热调谐MCI激光器。基于电调谐的MCI激光器实现了48.8nm的波长调谐范围,洛伦兹线宽小于350kHz。基于热调谐的MCI激光器在双工作温度下的波长调谐范围大于60nm,总热调谐功率小于35mW,整个调谐范围内洛伦兹线宽小于100kHz。同时,研究推进了其稳定控制及集成化工作,实现了基于热调谐MCI激光器的nano-ITLA。

Abstract:

Multi-channel interference (MCI) laser is a novel monolithically integrated widely-tunable semiconductor laser. It applies multi-arm interference based mode selection, and achieves wide tuning through either electro-optic effect or thermo-optic effect. It has the advantage of simple fabrication and large fabrication tolerance. The active and passive integration of the MCI laser utilizes the offset quantum well scheme, which reduces the difficulty for regrowth. The wavelength tuning range of the electrically tuned MCI laser is greater than 48nm, the output power is greater than 20mW, and the Lorentzian linewidth is less than 350kHz. The wavelength tuning range of thermally tuned MCI laser is greater than 60nm, and the Lorentzian linewidth over the entire tuning range is less than 100kHz at dual temperatures. Meanwhile, the research advances its stability control and integration, and demonstrates nano-ITLA based on thermally-tuned MCI lasers.