Ultra-broadband quantum cascade laser, tunable over 760 cm(-1), with balanced gain.

Abstract

A heterogeneous quantum cascade laser, consisting of multiple stacks of discrete wavelength quantum cascade stages, emitting in 5.9-10.9 µm, wavelength range is reported. The broadband characteristics are demonstrated with a distributed-feedback laser array, emitting at fixed frequencies at room temperature, covering an emission range of ~760 cm(-1), which is ~59% relative to the center frequency. By appropriate choice of a strained AlInAs/GaInAs material system, quantum cascade stage design and spatial arrangement of stages, the distributed-feedback array has been engineered to exhibit a flat threshold current density across the demonstrated range.

DOI: 10.1364/OE.23.021159

Cite this paper

@article{Bandyopadhyay2015UltrabroadbandQC, title={Ultra-broadband quantum cascade laser, tunable over 760 cm(-1), with balanced gain.}, author={Nupur Bandyopadhyay and M Chen and Suvankar Sengupta and S. Slivken and Manijeh Razeghi}, journal={Optics express}, year={2015}, volume={23 16}, pages={21159-64} }