Engineering multi-section quantum cascade lasers for broadband tuning

Steven Slivken, Manijeh Razeghi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In an effort to overcome current limitations to electrical tuning of quantum cascade lasers, a strategy is proposed which combines heterogeneous quantum cascade laser gain engineering with sampled grating architectures. This approach seeks to not only widen the accessible spectral range for an individual emitter, but also compensate for functional non-uniformity of reflectivity and gain lineshapes. A trial laser with a dual wavelength core is presented which exhibits electroluminescence over a 750 cm-1 range and discrete single mode laser emission over a 700 cm-1 range. Electrical tuning over 180 cm-1 is demonstrated with a simple sampled grating design. A path forward to even wider tuning is also described using more sophisticated gain and grating design principles.

Original languageEnglish (US)
Article number41
JournalPhotonics
Volume3
Issue number3
DOIs
StatePublished - Sep 1 2016

Keywords

  • Monolithic tunable laser
  • Quantum cascade laser
  • Sampled grating

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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