High-power, continuous-wave, phase-locked quantum cascade laser arrays emitting at 8 µm | Zendy

Wenjia Zhou | Zendy; Quan-Yong Lu | Zendy; Donghai Wu | Zendy; S. Slivken | Zendy; Manijeh Razeghi | Zendy

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High-power, continuous-wave, phase-locked quantum cascade laser arrays emitting at 8 µm

Author(s) -

Wenjia Zhou,

Quan-Yong Lu,

Donghai Wu,

S. Slivken,

Manijeh Razeghi

Publication year - 2019

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.015776

Subject(s) - optics , cascade , laser , materials science , quantum cascade laser , optoelectronics , quantum well , injection seeder , continuous wave , semiconductor laser theory , physics , chemistry , chromatography

We report a room-temperature eight-element phase-locked quantum cascade laser array emitting at 8 µm with a high continuous-wave power of 8.2 W and wall plug efficiency of 9.5%. The laser array operates primarily via the in-phase supermode and has single-mode emission with a side-mode suppression ratio of ~20 dB. The quantum cascade laser active region is based on a high differential gain (8.7 cm/kA) and low voltage defect (90 meV) design. A record high wall plug efficiency of 20.4% is achieved from a low loss buried ridge type single-element Fabry-Perot laser operating in pulsed mode at 20 °C.

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