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Applied Optics

Applied Optics


  • Vol. 38, Iss. 27 — Sep. 20, 1999
  • pp: 5775–5780

Threshold analysis of a chirped-grating distributed-feedback laser with the power series method

Muhammad Arif and Mohammad A. Karim  »View Author Affiliations

Applied Optics, Vol. 38, Issue 27, pp. 5775-5780 (1999)

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A new and efficient method for analyzing a chirped-grating distributed-feedback (DFB) laser is presented. We show that coupled-wave equations can be solved by use of the power series method. The single-mode gain margin of a linearly chirped-grating DFB laser is calculated for different chirping factors and coupling constants. We found that clearly optimum chirping exists for which the single-mode gain margin is maximum. The gain margins were also calculated for different positions of the cavity center. The effect of facet reflectivities and their phases on the gain margin was investigated. We found that the gain margin is maximum and the spatial hole burning is minimum for the cavity center at the middle of the laser cavity.

© 1999 Optical Society of America

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.3580) Lasers and laser optics : Lasers, solid-state
(230.6080) Optical devices : Sources
(270.3430) Quantum optics : Laser theory

Original Manuscript: April 13, 1999
Revised Manuscript: May 28, 1999
Published: September 20, 1999

Muhammad Arif and Mohammad A. Karim, "Threshold analysis of a chirped-grating distributed-feedback laser with the power series method," Appl. Opt. 38, 5775-5780 (1999)

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