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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 1317–1323

Single-mode 2.65 µm InGaAsSb/AlInGaAsSb laterally coupled distributed-feedback diode lasers for atmospheric gas detection

Ryan M. Briggs, Clifford Frez, Mahmood Bagheri, Carl E. Borgentun, James A. Gupta, Mark F. Witinski, James G. Anderson, and Siamak Forouhar  »View Author Affiliations

Optics Express, Vol. 21, Issue 1, pp. 1317-1323 (2013)

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We demonstrate index-coupled distributed-feedback diode lasers at 2.65 µm that are capable of tuning across strong absorption lines of HDO and other isotopologues of H2O. The lasers employ InGaAsSb/AlInGaAsSb multi-quantum-well structures grown by molecular beam epitaxy on GaSb, and single-mode emission is generated using laterally coupled second-order Bragg gratings etched alongside narrow ridge waveguides. We verify near-critical coupling of the gratings by analyzing the modal characteristics of lasers of different length. With an emission facet anti-reflection coating, 2-mm-long lasers exhibit a typical current threshold of 150 mA at 20 °C and are capable of emitting more than 25 mW in a single longitudinal mode, which is significantly higher than the output power reported for loss-coupled distributed-feedback lasers operating at similar wavelengths.

© 2013 OSA

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:
Remote Sensing

Original Manuscript: November 9, 2012
Manuscript Accepted: December 19, 2012
Published: January 11, 2013

Ryan M. Briggs, Clifford Frez, Mahmood Bagheri, Carl E. Borgentun, James A. Gupta, Mark F. Witinski, James G. Anderson, and Siamak Forouhar, "Single-mode 2.65 µm InGaAsSb/AlInGaAsSb laterally coupled distributed-feedback diode lasers for atmospheric gas detection," Opt. Express 21, 1317-1323 (2013)

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