Room-temperature continuous wave operation of distributed feedback quantum cascade lasers with watt-level power output

2010/12/06 by Q. Y. Lu, Qinwen Lu, Yulei Bai +5 · 3 citations
Chemistry · Engineering · #Spectroscopy and Laser Applications #Laser Design and Applications #Semiconductor Lasers and Optical Devices

paper · doi:10.1063/1.3525859

Abstract

We demonstrate surface-grating distributed feedback quantum cascade lasers (QCLs) with a watt-level power output at 4.75 μm. A device with a 5 mm cavity length exhibits an output power of 1.1 W in room-temperature cw operation. Single-mode operation with a side mode suppression ratio of 30 dB is obtained in the working temperature of 15–105 °C. A double-lobed far field with negligible beam steering is observed. The significance of this demonstration lies in its simplicity and readiness to be applied to standard QCL wafers with the promise of high-power performances.

Cited by

• Demonstration of High-Power and Stable Single-Mode in a Quantum Cascade Laser Using Buried Sampled Grating. [europepmc]
• Anomalous Mode Transitions in High Power Distributed Bragg Reflector Quantum Cascade Lasers. [europepmc]
• Tapered Quantum Cascade Laser Achieving Low Divergence Angle and High Output Power. [europepmc]

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