S. T. Ho*, S. Ezekiel, J. R. Haavisto, J. J. Danko

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


A solitary semiconductor laser has an intrinsic linewidth of similar 15 MHz at 5 mW. A reduction in this broad linewidth is necessary for coherent applications. It has been demonstrated recently that a reduction of the laser linewidth by as much as a factor of 100 can be achieved by using a low-level optical feedback. However, this rather simple method of reducing the linewidth suffers from the problem that the degree of linewidth narrowing depends on the phase of the optical feedback. In addition, mode-hopping can occur which also depends on the phase and the amount of feedback. In this paper, the authors present a method to control the phase of the optical feedback so as to maintain a stable laser operation at a particular feedback level with the minimum linewidth.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherOptical Soc of America
Number of pages2
StatePublished - Dec 1 1985

ASJC Scopus subject areas

  • Engineering(all)


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