Kim Mijin, Bewley William W, Canedy Chadwick L, Kim Chul Soo, Merritt Charles D, Abell Joshua, Vurgaftman Igor, Meyer Jerry R
Opt Express. 2015 Apr 20;23(8):9664-72. doi: 10.1364/OE.23.009664.
We report the pulsed and continuous wave (cw) performance of 10-stage interband cascade lasers (ICLs) emitting at both λ ≈3.2 μm and λ ≈3.45 μm. The slope efficiency is higher while the external differential quantum efficiency per stage remains about the same when comparison is made to earlier results for 7-stage ICLs with similar carrier-rebalanced designs. At T = 25°C, an 18-μm-wide ridge with 4.5 mm cavity length and high-reflection/anti-reflection coatings emits up to 464 mW of cw output power with beam quality factor M(2) = 1.9, for higher brightness than has ever been reported previously for an ICL. When the cavity length is reduced to 1 mm, both the 10-stage and 7-stage devices reach 18% cw wallplug efficiency at T = 25°C.
我们报告了在λ≈3.2μm和λ≈3.45μm波长处发射的10级带间级联激光器（ICL）的脉冲和连续波（cw）性能。与具有类似载流子再平衡设计的7级ICL的早期结果相比，斜率效率更高，而每级的外部微分量子效率保持大致相同。在T = 25°C时，一个18μm宽、腔长4.5mm且具有高反射/抗反射涂层的脊形激光器发出高达464mW的连续波输出功率，光束质量因子M(2)=1.9，其亮度高于此前报道的任何ICL。当腔长减小到1mm时，10级和7级器件在T = 25°C时的连续波壁插效率均达到18%。
