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Optics Letters

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  • Vol. 24, Iss. 5 — Mar. 1, 1999
  • pp: 336–338

Analysis of fringe locking in a laser diode interferometer under injection-current modulation

Jiyuan Liu and Ichirou Yamaguchi  »View Author Affiliations


Optics Letters, Vol. 24, Issue 5, pp. 336-338 (1999)
http://dx.doi.org/10.1364/OL.24.000336


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Abstract

A theoretical analysis has been performed that explains a fringe-locking phenomenon observed in a two-beam interferometer in which a laser diode was subjected to optical feedback and modulation of its injection current. The dependence of wavelength change on the injection-current variation is calculated by use of a model of coupled resonators consisting of the laser cavity and the interferometer. The fringe phase change caused by modulation of the injection current is derived from this model and has proved to be suppressed within much less than 2π in excess of an integer multiple of 2π if the path difference of the interferometer is longer than 10 mm. The calculated phase fluctuation agrees well with those observed in experiments.

© 1999 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(140.2020) Lasers and laser optics : Diode lasers

Citation
Jiyuan Liu and Ichirou Yamaguchi, "Analysis of fringe locking in a laser diode interferometer under injection-current modulation," Opt. Lett. 24, 336-338 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-5-336

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