Author(s): Ye, F (Ye, Fan); Cheng, FM (Cheng, Fengmin); Jia, ZW (Jia, Zhiwei); Zhang, JC (Zhang, JinChuan); Zhuo, N (Zhuo, Ning); Liu, FQ (Liu, Fengqi); Shi, Y (Shi, Yi)

Source: OPTICAL AND QUANTUM ELECTRONICS Volume: 54 Issue: 4 Article Number: 236 DOI: 10.1007/s11082-022-03644-5 Published: APR 2022

Abstract: A 20-channeldistributed feedback (DFB) quantum cascade laser (QCL) arrays based on uniform buried grating have been demonstrated. In pulsed mode, peak power reaches 80 mW and slope efficiency reaches 167 mW/A for 2.5 mm-long laser in the arrays at room temperature. The loss difference of two band-edge mode increases when reflectivity of the front facet becomes small, which prevents the mode hopping. The device shows linear tuning after the anti-reflectivity coating is deposited in the front facet, maintaining peak power of 64 mW. The whole chip covers a tuning range of 64 cm(-1), centering at 8.3 mu m, with side-mode-suppression-ratio over 20 dB at room temperature.

Accession Number: WOS:000771563500023

ISSN: 0306-8919

eISSN: 1572-817X

Full Text: https://link.springer.com/article/10.1007/s11082-022-03644-5