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Optics Letters

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  • Vol. 23, Iss. 2 — Jan. 15, 1998
  • pp: 114–116

Noise reduction in a mode-locked semiconductor laser by coherent photon seeding

Patrick Langlois, David Gay, Nathalie McCarthy, and Michel Piché  »View Author Affiliations


Optics Letters, Vol. 23, Issue 2, pp. 114-116 (1998)
http://dx.doi.org/10.1364/OL.23.000114


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Abstract

We have used coherent photon seeding to reduce the noise in an actively mode-locked extended-cavity semiconductor laser. Feedback is provided by an auxiliary cavity terminated either by a wedge plate or by a phase-conjugate mirror. Both conventional and phase-conjugate feedback can reduce the low-frequency noise components (0–5 MHz) by as much as 36 dB, hence drastically reducing the pulse fluctuations. A noise reduction of as much as 18 dB is also observed in the 0.01–3.0-GHz frequency range. We obtained these results while preserving the pulse duration (26 ps) and improving the time–bandwidth product.

© 1998 Optical Society of America

OCIS Codes
(030.4280) Coherence and statistical optics : Noise in imaging systems
(030.5260) Coherence and statistical optics : Photon counting
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.5960) Lasers and laser optics : Semiconductor lasers

Citation
Patrick Langlois, David Gay, Nathalie McCarthy, and Michel Piché, "Noise reduction in a mode-locked semiconductor laser by coherent photon seeding," Opt. Lett. 23, 114-116 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-2-114


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