Current and frequency modulation characteristics for continuous-wave quantum cascade lasers at 9.06 μm

Lei Tao, Kang Sun, David J. Miller, M. Amir Khan, Mark A. Zondlo

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We report the characteristics of current induced frequency modulation (FM) for two continuous-wave quantum cascade lasers (QCLs) at 9.06 μm. Both the frequency tuning rate and the phase shift between intensity modulation and FM are measured at different modulation frequencies from 10 Hz to 200 kHz. The frequency tuning rate of the QCLs depends on both the modulation frequency and amplitude. The tested QCL has been used to detect ambient water vapor with wavelength modulation spectroscopy for validation with a numerical model.

Original languageEnglish (US)
Pages (from-to)1358-1360
Number of pages3
JournalOptics Letters
Volume37
Issue number8
DOIs
StatePublished - Apr 15 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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