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- Title
High-Power Mid-Infrared Quantum Cascade Laser with Large Emitter Width.
- Authors
Wang, Yupei; Zhang, Yuhang; Wang, Jun; Cheng, Yang; Zhao, Wu; Wei, Zhixiang; Zhou, Dayong
- Abstract
High-power quantum cascade lasers (QCLs) have a wide application prospect. In this paper, a high-power high-beam-quality device with a large ridge width is demonstrated. The effect of different ridge widths on mode loss was studied, and the results showed that the mode loss decreased as the ridge width increased. Furthermore, as the width of the ridge increased, the temperature of the active region rose. In the experiment, the wafers were grown by metal–organic chemical vapor deposition (MOCVD), and the ridge width of the device was controlled by wet etching. A laser with a ridge width of 15 µm and a length of 5 mm achieved an output of 2.2 W under 288 K continuous wave (CW) operation, with a maximum slow-axis divergence angle of 27.2° and a device wavelength of 5 μm. The research results of this article promote the industrial production of base transverse mode QCL.
- Subjects
MID-infrared lasers; QUANTUM cascade lasers; CONTINUOUS wave lasers; CHEMICAL vapor deposition
- Publication
Photonics, 2024, Vol 11, Issue 3, p214
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics11030214