Gain coupling of class A semiconductor lasers

Chris Hessenius, Nathan Terry, Mahmoud Fallahi, Jerome Moloney, Robert Bedford

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We report on the development of a gain-coupled class A semiconductor laser for dual-wavelength generation via optical switching. A vertical external cavity surface emitting laser (VECSEL) structure is used, because it provides a flexible platform for high-power, high-brightness output in the near-IR and visible ranges. For the first time (to our knowledge), two VECSEL cavities sharing a common gain region are studied. Because the cavities are in competition for common carriers, biréfringent filters in the external cavity control the laser cavity thresholds; this configuration demonstrates the possibility of switching between the two cavities, which can operate at different wavelengths. However, in this Letter we also show, numerically and experimentally, that with the consideration of spontaneous emission, it is possible to maintain simultaneous lasing in each cavity at a different wavelength.

Original languageEnglish (US)
Pages (from-to)3060-3062
Number of pages3
JournalOptics letters
Issue number18
StatePublished - Sep 16 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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