Photonics Research, 2019, 7 (11): 11001244, Published Online: Oct. 23, 2019
14 μm quantum cascade lasers based on diagonal transition and nonresonant extraction Download: 601次
Abstract
We report InP-based room-temperature high-average-power quantum cascade lasers emitting at 14 μm. Using a novel active region design, a diagonal bound-to-bound lasing transition is guaranteed by efficient electron injection into the upper laser level and fast nonresonant electron extraction through a miniband from the lower laser level. For a 4 mm long and 40 μm wide double channel ridge waveguide laser with 55 stages of the active region, the threshold current density is only at room temperature. At 293 K, and the maximum single-facet peak power and average power are up to 830 mW and 75 mW, respectively. The laser exhibits a characteristic temperature of 395 K over a temperature range from 293 to 353 K.
Shouzhu Niu, Junqi Liu, Fengmin Cheng, Huan Wang, Jinchuan Zhang, Ning Zhuo, Shenqiang Zhai, Lijun Wang, Shuman Liu, Fengqi Liu, Zhanguo Wang, Xiaohua Wang, Zhipeng Wei. 14 μm quantum cascade lasers based on diagonal transition and nonresonant extraction[J]. Photonics Research, 2019, 7(11): 11001244.