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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 24 — Dec. 2, 2013
  • pp: 29780–29791

Performance improvement by a saturable absorber in gain-switched asymmetric-waveguide laser diodes

Brigitte Lanz, Boris S. Ryvkin, Eugene A. Avrutin, and Juha T. Kostamovaara  »View Author Affiliations


Optics Express, Vol. 21, Issue 24, pp. 29780-29791 (2013)
http://dx.doi.org/10.1364/OE.21.029780


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Abstract

A simplest saturable absorber, in the form of an unpumped section, is introduced into a Fabry-Perot semiconductor laser with a strongly asymmetric broadened waveguide structure incorporating a relatively thick (80 nm) active layer. This allows for suppression of trailing oscillations and a decrease in the optical pulse width compared to the uniformly biased structure. Single optical pulses of ~80 ps full width at half maximum (FWHM) and ~35 W peak power (~3 nJ pulse energy, Eopt), practically without trailing edge oscillations, were experimentally achieved under room temperature conditions by absorber-assisted gain-switching, using pumping current pulses of ~1.3 ns FWHM and ~17 A amplitude. The laser emission has a narrow (13 degrees FWHM in the transverse direction) far field.

© 2013 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.5960) Lasers and laser optics : Semiconductor lasers
(320.5390) Ultrafast optics : Picosecond phenomena
(320.7090) Ultrafast optics : Ultrafast lasers
(140.3295) Lasers and laser optics : Laser beam characterization
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 18, 2013
Revised Manuscript: November 19, 2013
Manuscript Accepted: November 20, 2013
Published: November 25, 2013

Citation
Brigitte Lanz, Boris S. Ryvkin, Eugene A. Avrutin, and Juha T. Kostamovaara, "Performance improvement by a saturable absorber in gain-switched asymmetric-waveguide laser diodes," Opt. Express 21, 29780-29791 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-24-29780


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References

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