Yang Hanting, Yang Rui Q, Gong Jingli, He Jian-Jun
Opt Lett. 2020 May 15;45(10):2700-2703. doi: 10.1364/OL.391308.
We demonstrate widely tunable single-mode V-coupled-cavity lasers emitting at wavelengths near 3 µm based on a type-II interband cascade (IC) structure. The mode selection is achieved using a half-wave V-coupler designed for the IC structure in the mid-infrared range. The laser waveguides and cavity structure are deeply etched in a single etching step, without any grating. By changing the injection current at a fixed heat-sink temperature, a tuning range over 35 nm can be achieved with a side-mode suppression-ratio up to 28 dB. The tuning range can be extended to 60 nm when combined with the adjustments of the heat-sink temperature.
我们展示了基于II型带间级联（IC）结构的、在波长接近3 µm处发射的广泛可调谐单模V耦合腔激光器。模式选择是通过为中红外范围的IC结构设计的半波V耦合器实现的。激光波导和腔结构在单个蚀刻步骤中被深度蚀刻，无需任何光栅。在固定的热沉温度下改变注入电流，可实现超过35 nm的调谐范围，边模抑制比高达28 dB。当结合热沉温度的调整时，调谐范围可扩展到60 nm。
