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Optics Letters

Optics Letters


  • Vol. 21, Iss. 16 — Aug. 15, 1996
  • pp: 1256–1258

Improvement of interference fringes of a laser diode interferometer by controlling chaos with sinusoidally modulated injection

Nobuyuki Watanabe and Koichi Karaki  »View Author Affiliations

Optics Letters, Vol. 21, Issue 16, pp. 1256-1258 (1996)

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Interference fringes of a laser diode Michelson interferometer are distorted by the external reflection of light to the laser diode. We demonstrate by a numerical model that one can stabilize the interference fringes by controlling chaos with a sinusoidal modulation of the injection current. We optimized the modulation frequency by referring to an AM power spectrum of the intrinsic fluctuation of a compound-cavity laser diode output and optimized the modulation depth by referring to a bifurcation diagram plotted against modulation depth. The controlled system with optimally tuned sinusoidal modulation is stable with changes in external power reflection. A small perturbation of dc bias of less than 2% can improve the stability of the interference fringes.

© 1996 Optical Society of America

Original Manuscript: December 20, 1995
Published: August 15, 1996

Nobuyuki Watanabe and Koichi Karaki, "Improvement of interference fringes of a laser diode interferometer by controlling chaos with sinusoidally modulated injection," Opt. Lett. 21, 1256-1258 (1996)

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