Elimination of a back-reflected TE mode in a TM-mode optical isolator with a Mach-Zehnder interferometer

Hideki Yokoi; Tetsuya Mizumoto; Shinpei Kuroda; Takafumi Ohtsuka; Yoshiaki Nakano

doi:10.1364/AO.41.007045

Elimination of a back-reflected TE mode in a TM-mode optical isolator with a Mach-Zehnder interferometer

Hideki Yokoi, Tetsuya Mizumoto, Shinpei Kuroda, Takafumi Ohtsuka, Yoshiaki Nakano

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Elimination of a back-reflected TE mode traveling in a TM-mode optical isolator was investigated. The optical isolator had a Mach-Zehnder interferometer that included a polarization-dependent reciprocal phase shifter in one of the arms. The reciprocal phase shift was achieved by an optical path difference between the two arms. By adjustment of the length of the reciprocal phase shifter, the interferometer prevented the back-reflected TE mode from coupling into an input port of the isolator. An extinction ratio of more than 18 dB was obtained against the back-reflected TE mode at a wavelength of 1.55 μm.

Original language	English
Pages (from-to)	7045-7051
Number of pages	7
Journal	Applied Optics
Volume	41
Issue number	33
DOIs	https://doi.org/10.1364/AO.41.007045
Publication status	Published - 2002 Nov 20
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.41.007045

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abstract = "Elimination of a back-reflected TE mode traveling in a TM-mode optical isolator was investigated. The optical isolator had a Mach-Zehnder interferometer that included a polarization-dependent reciprocal phase shifter in one of the arms. The reciprocal phase shift was achieved by an optical path difference between the two arms. By adjustment of the length of the reciprocal phase shifter, the interferometer prevented the back-reflected TE mode from coupling into an input port of the isolator. An extinction ratio of more than 18 dB was obtained against the back-reflected TE mode at a wavelength of 1.55 μm.",

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AU - Ohtsuka, Takafumi

AU - Nakano, Yoshiaki

PY - 2002/11/20

Y1 - 2002/11/20

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AB - Elimination of a back-reflected TE mode traveling in a TM-mode optical isolator was investigated. The optical isolator had a Mach-Zehnder interferometer that included a polarization-dependent reciprocal phase shifter in one of the arms. The reciprocal phase shift was achieved by an optical path difference between the two arms. By adjustment of the length of the reciprocal phase shifter, the interferometer prevented the back-reflected TE mode from coupling into an input port of the isolator. An extinction ratio of more than 18 dB was obtained against the back-reflected TE mode at a wavelength of 1.55 μm.

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Elimination of a back-reflected TE mode in a TM-mode optical isolator with a Mach-Zehnder interferometer

Abstract

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