Accession Number:

ADP013144

Title:

Recent Results in Quantum Cascade Lasers and Applications

Descriptive Note:

Conference proceedings

Corporate Author:

LUCENT TECHNOLOGIES INC MURRAY HILL NJ

Report Date:

2000-06-23

Pagination or Media Count:

5.0

Abstract:

Recent advances in quantum cascade QC lasers include widely tunable single-mode distributed feedback DFB lasers with high optical power at lamba approximately 4.6 micrometers. and single-mode DFB lasers at lamba approximately 16 micrometers based on new surface plasmons waveguides with dual-metal gratings. Single-mode and tunable QC-DFB lasers have successfully been used in many collaborations for various trace-gas sensing applications. Examples are the detection of stratospheric methane and nitrous oxide, the sub-ppbv detection of ammonia by cavity ring down spectroscopy, methane concentration and isotopic composition measurements. and the detection of complex molecules in open air by direct absorption spectroscopy. The versatility of band structure engineering enabled the design and realization of QC-lasers. which operate under both. positive and negative polarity displaying distinct characteristics in each polarity if an asymmetric structure is employed.

Subject Categories:

  • Lasers and Masers
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE