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Proceedings Paper

Characterization of a Sagnac loop mirror-based hybrid passive variable optical coupler/attenuator
Author(s): Simeon Bikorimana; Muhammad A. Ummy; Abdullah Hossain; Richard Lin; Roger Dorsinville
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Paper Abstract

The implementation and performance of a unidirectional all-single mode fiber hybrid passive variable optical coupler/attenuator based on a Sagnac loop mirror with a continuous variable coupling ratio using off-the-shelf optical sub-components are discussed. Parameters of two output ports of the unidirectional hybrid passive variable optical coupler/attenuator, such as maximum coupling ratio, insertion loss, excess loss, and wavelength- dependent return loss over the C-band at room temperature are reported. The reflectivity of the Sagnac loop mirror continuously varies from 0.1% to 99.9% by adjusting retarders of a polarization controller. The 3-dB coupling ratio (i.e., 50:50) between the two output ports of the hybrid passive variable optical coupler/attenuator is achieved when the reflectivity of the Sagnac loop mirror is set at 73%. The attenuation and coupling ratio range of 1.7 - 45.5 dB and 0.13 - 99.87% is achieved, respectively, from the implemented unidirectional hybrid passive variable optical coupler/attenuator. The availability of the off-the-shelf optical sub-components and achieved easy control of continuous variable coupling ratio makes the proposed unidirectional hybrid passive variable optical coupler/attenuator a cost-effective optical device for several applications including optical system testing, and general laboratory experiments.

Paper Details

Date Published: 3 March 2020
PDF: 8 pages
Proc. SPIE 11276, Optical Components and Materials XVII, 112761E (3 March 2020); doi: 10.1117/12.2543606
Show Author Affiliations
Simeon Bikorimana, City Univ. of New York (United States)
Muhammad A. Ummy, City Univ. of New York (United States)
Abdullah Hossain, City Univ. of New York (United States)
Richard Lin, City Univ. of New York (United States)
Roger Dorsinville, City Univ. of New York (United States)


Published in SPIE Proceedings Vol. 11276:
Optical Components and Materials XVII
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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