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Semiclassical theory of noise in multielement semiconductor lasers

Lang, Robert J. and Yariv, Amnon (1986) Semiclassical theory of noise in multielement semiconductor lasers. IEEE Journal of Quantum Electronics, 22 (3). pp. 436-449. ISSN 0018-9197.

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We present a derivation of the noise spectra of multielement semiconductor lasers. We model the noise by a set of Langevin sources which drive a system of small-signal field equations. The Langevin sources are normalized to transition rates within the laser and general formulas for relative intensity, frequency fluctuation, and field spectra are produced. We evaluate the formulas for several specific cases of interest, including those of a passive-active resonator and active-active coupled cavity resonator. In each case, the linewidth is governed by effective α-parameter(s) which generally differ from the material parameter. In the active-active cavity, the linewidth consists of two parts, one which is similar to the Schawlow-Townes linewidth, and a second which is proportional to the FM modulation index.

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Additional Information:© Copyright 1986 IEEE. Reprinted with permission. Manuscript received July 18, 1985; revised October 18, 1985. This work was supported by grants from the Office of Naval Research, ITT Corporation, Rockwell International, and the Air Force Office of Scientific Research. The work of R. J. Lang was supported by a fellowship from the National Science Foundation. The authors would like to acknowledge fruitful discussions with Dr. K. Vahala.
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Deposited On:10 Oct 2006
Last Modified:02 Oct 2019 23:21

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