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

N. Bandyopadhyay, M. Chen, S. Sengupta, S. Slivken, M. Razeghi

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)21159-21164
Number of pages6
JournalOptics Express
Issue number16
StatePublished - Aug 10 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Ultra-broadband quantum cascade laser, tunable over 760 cm-1, with balanced gain'. Together they form a unique fingerprint.

Cite this