5.3 μm-Emitting Diffraction-Limited Leaky-Wave-Coupled Quantum Cascade Laser Phase-Locked Array
| Autor: | Jae Ha Ryu, Robert Bedford, Ricky Gibson, Dan Botez, Luke J. Mawst, C. Boyle, C. Sigler, D. Lindberg, Jeremy Kirch, Thomas Earles |
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| Rok vydání: | 2019 |
| Předmět: |
Diffraction
Coupling Materials science business.industry Phase (waves) 02 engineering and technology Pulsed power Laser Atomic and Molecular Physics and Optics law.invention 020210 optoelectronics & photonics Optics law Cascade 0202 electrical engineering electronic engineering information engineering Chirp Electrical and Electronic Engineering Quantum cascade laser business |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 25:1-9 |
| ISSN: | 1558-4542 1077-260X |
| Popis: | A three-element phase-locked array of ∼5.3 μm-emitting quantum cascade lasers fabricated by a two-step MOCVD process is demonstrated which operates in a diffraction-limited beam to 5.3 W peak pulsed power. To compensate for overetching at the array edges, the fabrication process was modified such that it resulted in array elements of equal width. Then the array operates in a pure in-phase array mode, in agreement with simulations based on the actual device dimensions, which indicate that resonant leaky-wave coupling occurs for this device's geometry. Measured uniform near-field intensity profiles confirm resonant coupling. Simulations indicate that chirping of the element widths would allow for modification of the near-field intensity profile to mitigate the effects of thermal lensing in continuous-wave operation. |
| Databáze: | OpenAIRE |
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