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Optical Engineering

Control of optical-feedback-induced laser intensity noise in optical data recording
Author(s): George R. Gray; Andrew T. Ryan; Govind P. Agrawal; Edward C. Gage
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Paper Abstract

The usefulness of semiconductor lasers can be greatly limited when the laser is subjected to uncontrolled optical feedback (OFB). In particular, the laser intensity noise can be severely degraded when OFB is greater than 0.1%. Although the technique of high-frequency injection (HFI) can solve this problem, the proper modulation frequency and depth must be chosen empirically. We investigate this problem through cornputer simulations of the multimode stochastic rate equations, modified to include OFB and HFI. By providing the program with measurable laser and system parameters, the simulations predict the HFI modulation frequency and depth that optimize the laser behavior. The results of the simulations are compared with experiment, and good agreement is obtained.

Paper Details

Date Published: 1 April 1993
PDF: 7 pages
Opt. Eng. 32(4) doi: 10.1117/12.130137
Published in: Optical Engineering Volume 32, Issue 4
Show Author Affiliations
George R. Gray, Univ. of Rochester (United States)
Andrew T. Ryan, University of Rochester (United States)
Govind P. Agrawal, Univ. of Rochester (United States)
Edward C. Gage, Eastman Kodak Co. (United States)

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