Progress in monolithic, broadband, widely tunable midinfrared quantum cascade lasers

Manijeh Razeghi; Wenjia Zhou; Ryan McClintock; Donghai Wu; Steven Slivken

doi:10.1117/1.OE.57.1.011018

5 October 2017 Progress in monolithic, broadband, widely tunable midinfrared quantum cascade lasers

Manijeh Razeghi, Wenjia Zhou, Ryan McClintock, Donghai Wu, Steven Slivken

Author Affiliations +

Optical Engineering, Vol. 57, Issue 1, 011018 (October 2017). https://doi.org/10.1117/1.OE.57.1.011018

Abstract

We present recent progress on the development of monolithic, broadband, widely tunable midinfrared quantum cascade lasers. First, we show a broadband midinfrared laser gain realized by a heterogeneous quantum cascade laser based on a strain balanced composite well design of Al0.63In0.37As/Ga0.35In0.65As/Ga0.47In0.53As. Single mode emission between 5.9 and 10.9 μm under pulsed mode operation was realized from a distributed feedback laser array, which exhibited a flat current threshold across the spectral range. Using the broadband wafer, a monolithic tuning between 6.2 and 9.1 μm was demonstrated from a beam combined sampled grating distributed feedback laser array. The tunable laser was utilized for a fast sensing of methane under pulsed operation. Transmission spectra were obtained without any moving parts, which showed excellent agreement to a standard measurement made by a Fourier transform infrared spectrometer.

Citation Download Citation

Manijeh Razeghi, Wenjia Zhou, Ryan McClintock, Donghai Wu, and Steven Slivken "Progress in monolithic, broadband, widely tunable midinfrared quantum cascade lasers," Optical Engineering 57(1), 011018 (5 October 2017). https://doi.org/10.1117/1.OE.57.1.011018

Received: 31 May 2017; Accepted: 12 September 2017; Published: 5 October 2017

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