Single-mode fibers to single-mode waveguides coupling with minimum Fresnel back-reflection

Anat Sneh; Shlomo Ruschin; Emanuel Marom

doi:10.1117/12.49068

1 April 1991 Single-mode fibers to single-mode waveguides coupling with minimum Fresnel back-reflection

Anat Sneh, Shlomo Ruschin, Emanuel Marom

Proceedings Volume 1442, 7th Mtg in Israel on Optical Engineering; (1991) https://doi.org/10.1117/12.49068
Event: 7th Meeting of Optical Engineering in Israel, 1990, Tel-Aviv, Israel

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.

Citation Download Citation

Anat Sneh, Shlomo Ruschin, and Emanuel Marom "Single-mode fibers to single-mode waveguides coupling with minimum Fresnel back-reflection", Proc. SPIE 1442, 7th Mtg in Israel on Optical Engineering, (1 April 1991); https://doi.org/10.1117/12.49068

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