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Proceedings Paper

Single-mode fibers to single-mode waveguides coupling with minimum Fresnel back-reflection
Author(s): Anat Sneh; Shlomo Ruschin; Emanuel Marom
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Paper Abstract

Slantly polished fibers and waveguides coupling as a means for achieving both low optical power reflection and efficient power transmission is proposed. Return losses exceeding -70 dB can be obtained in fiber-to-Lithium Niobate waveguides operating at ) = 0.633 jm and ) = 1.3 pm by polishing the fiber at an angle of 6°. A phase matching condition between the propagation constants ,8 and the polishing angles in the fiber and the waveguide: fl(fiber)sincx(fiber) = fl(waveguide)sina(waveguide) must be fulifiled in order to enable efficient power coupling. Polishing angle tolerances of approximately lO are allowed for a maximum of 1 dB decrease in the coupling efficiency.

Paper Details

Date Published: 1 April 1991
PDF: 6 pages
Proc. SPIE 1442, 7th Mtg in Israel on Optical Engineering, (1 April 1991); doi: 10.1117/12.49068
Show Author Affiliations
Anat Sneh, Tel-Aviv Univ. (United States)
Shlomo Ruschin, Tel-Aviv Univ. (Israel)
Emanuel Marom, Tel-Aviv Univ. (Israel)


Published in SPIE Proceedings Vol. 1442:
7th Mtg in Israel on Optical Engineering

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