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Applied Optics

Applied Optics


  • Vol. 38, Iss. 21 — Jul. 20, 1999
  • pp: 4558–4565

Characterization of fiber distributed-feedback lasers with an index-perturbation method

Erlend Rønnekleiv, Morten Ibsen, Michael N. Zervas, and Richard I. Laming  »View Author Affiliations

Applied Optics, Vol. 38, Issue 21, pp. 4558-4565 (1999)

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We demonstrate the characterization of fiber distributed-feedback lasers by scanning a heat-induced index perturbation along the cavity and by measuring the induced laser frequency shift. The measured shift is shown to be a good indicator for the intensity distribution in the cavity, and the experimental results reveal that the sensitivity of fiber distributed-feedback laser sensors with frequency readout is highly localized near the grating phase-shift position. Use of the characterization data to determine the grating coupling parameter κ, the polarization dependence of κ, and birefringence nonuniformities as well as for identification of the order of longitudinal mode operation are discussed and demonstrated experimentally. Asymmetrically phase-shifted lasers with highly directional output are also investigated.

© 1999 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3430) Lasers and laser optics : Laser theory
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4780) Lasers and laser optics : Optical resonators
(230.1480) Optical devices : Bragg reflectors

Original Manuscript: January 4, 1999
Revised Manuscript: April 6, 1999
Published: July 20, 1999

Erlend Rønnekleiv, Morten Ibsen, Michael N. Zervas, and Richard I. Laming, "Characterization of fiber distributed-feedback lasers with an index-perturbation method," Appl. Opt. 38, 4558-4565 (1999)

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