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Proceedings Paper

New optical hybrid device for Raman amplifiers
Author(s): Yonglin Huang; Herman C. Chui; Shuqing Ma; Qi Deng
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Paper Abstract

This article describes a new hybrid fiber-optic component invented by the authors, iPBCTM/iPBS$_TM), which has the functionality of a Polarization Beam Combiner/splitter (PBC/PBS) with isolation in the backward optical path. 0.3dB combining loss and 30dB isolation are demonstrated in the forward and backward optical paths respectively. PBCs are widely used in Raman amplifiers. They provide a simple way to combine two optical pumping sources into a single beam to increase the optical pumping power and provide equal polarizations in two orthogonal directions. Inside pump lasers, it is difficult to use a free space isolator to get rid of back reflections since most of the Raman pump lasers use Fiber Bragg Gratings (FBGs) to stabilize pumping wavelengths. One way to solve this problem is to use an iPBCTM to provide high combining efficiency in the forward direction and high optical isolation in the backward direction. This new hybrid device has been designed and fabricated in our laboratory and has demonstrated 0.3dB combining loss and 30dB peak isolation. It enables a new generation of Raman amplifiers with higher performance, smaller footprint and lower cost.

Paper Details

Date Published: 17 October 2001
PDF: 10 pages
Proc. SPIE 4581, Passive Components and Transmission Systems, (17 October 2001); doi: 10.1117/12.445073
Show Author Affiliations
Yonglin Huang, New Focus, Inc. (United States)
Herman C. Chui, New Focus, Inc. (United States)
Shuqing Ma, New Focus, Inc. (United States)
Qi Deng, New Focus, Inc. (United States)

Published in SPIE Proceedings Vol. 4581:
Passive Components and Transmission Systems
Chongcheng Fan; Norman S. Kwong, Editor(s)

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