Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ~11.8 μm

doi:10.1088/1674-1056/abf91a

Abstract We demonstrate a broad gain, continuous-wave (CW) operation InP-based quantum cascade laser (QCL) emitting at 11.8 μm with a modified dual-upper-state (DAU) and diagonal transition active region design. A 3 mm cavity length, 16.5 μm average ridge wide QCL with high-reflection (HR) coatings demonstrates a maximum peak power of 1.07 W at 283 K and CW output power of 60 mW at 293 K. The device also shows a broad and dual-frequency lasing spectrum in pulsed mode and a maximum average power of 258.6 mW at 283 K. Moreover, the full width at half maximum (FWHM) of the electroluminescent spectrum measured at subthreshold current is 2.37 μm, which indicates a broad gain spectrum of the materials. The tuning range of 1.38 μm is obtained by a grating-coupled external cavity (EC) Littrow configuration, which is beneficial for gas detection.

Keywords: dual-upper-state (DAU) quantum cascade lasers external cavity gas detection

Received: 12 March 2021
Revised: 07 April 2021
Accepted manuscript online: 19 April 2021

PACS:	42.55.Px	(Semiconductor lasers; laser diodes)
	42.60.Lh	(Efficiency, stability, gain, and other operational parameters)
	42.60.Pk	(Continuous operation)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2018YFA0209103), the National Natural Science Foundation of China (Grant Nos. 61991430, 61774146, 61790583, 61734006, 61835011, 61674144, 61774150, and 61805168), Beijing Municipal Science & Technology Commission, China (Grant No. Z201100004020006), and the Key Projects of the Chinese Academy of Sciences (Grant Nos. 2018147, YJKYYQ20190002, QYZDJ-SSW-JSC027, XDB43000000, and ZDKYYQ20200006).

Corresponding Authors: Jin-Chuan Zhang, Jin-Chuan Zhang
E-mail: zhangjinchuan@semi.ac.cn;fqliu@semi.ac.cn

Cite this article:

Huan Wang(王欢), Jin-Chuan Zhang(张锦川), Feng-Min Cheng(程凤敏), Zeng-Hui Gu(顾增辉), Ning Zhuo(卓宁), Shen-Qiang Zhai(翟慎强), Feng-Qi Liu(刘峰奇), Jun-Qi Liu(刘俊岐), Shu-Man Liu(刘舒曼), and Zhan-Guo Wang(王占国) Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ~11.8 μm 2021 Chin. Phys. B 30 124202

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Broad gain, continuous-wave operation of InP-based quantum cascade laser at λ~11.8 μm

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