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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 23 — Dec. 1, 1983
  • pp: 3837–3844

Comparison of efficiency and feedback characteristics of techniques for coupling semiconductor lasers to single-mode fiber

G. Wenke and Y. Zhu  »View Author Affiliations


Applied Optics, Vol. 22, Issue 23, pp. 3837-3844 (1983)
http://dx.doi.org/10.1364/AO.22.003837


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Abstract

The coupling of CSP lasers to single-mode fibers with different coupling structures made on the fiber face is investigated. In this case easy to make coupling arrangements such as tapers and microlenses, result in a high launching efficiency (∼2-dB loss), in contrast to launching from gain-guided lasers with strong astigmatism and a broader far-field pattern. Index-guiding lasers exhibit, however, a higher sensitivity to optical feedback. Laser output power and wavelength are changed due to reflections from the fiber tip. Critical distances exist which lead to a highly unstable laser spectrum. A comparison of the influence of various fiber faces on laser power and wavelength stability is presented. It is concluded that a tapered fiber end with a large working distance reduces the influence on the laser's performance.

© 1983 Optical Society of America

History
Original Manuscript: April 2, 1983
Published: December 1, 1983

Citation
G. Wenke and Y. Zhu, "Comparison of efficiency and feedback characteristics of techniques for coupling semiconductor lasers to single-mode fiber," Appl. Opt. 22, 3837-3844 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-23-3837

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