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Proceedings Paper

Measurement of distributed mode coupling in high birefringence polarization-maintaining fiber with random polarization modes exited
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Paper Abstract

A white light Michelson interferometer is designed to measure the distributed polarization mode coupling in High birefringence polarization-maintaining fibers (HiBi-PMFs). Using a Michelson interferometer to compensate the optical path difference induced by the modal birefringence of PMF, both power coupling intensity and position of the coupling point can be acquired. Traditionally, this technique requires only one polarization mode in the PMF to be exited or both polarization modes to be exited with equal intensity. This needs precise alignment of the polarization direction with the principal axis of the PMF. In practice, it's not easy to realize. In this paper, the influence of the incident polarization extinction ratio (PER) on the measurement result was evaluated theoretically and experimentally. A polarization state adjusting mechanism is designed. An analyzer can be oriented at any angle of the PMF's principle axes. By alternating this angle between 0o, 90o and 45o, the incident PER can be calculated and the measurement can be carried out with random exited polarization mode. An instrument was designed and implemented to verify this scheme. Spatial resolution better than 7cm and coupling strength sensitivity less than -75dB are realized.

Paper Details

Date Published: 20 January 2006
PDF: 10 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 60270N (20 January 2006); doi: 10.1117/12.667901
Show Author Affiliations
Feng Tang, Tianjin Univ. (China)
Wencai Jing, Tianjin Univ. (China)
Yimo Zhang, Tianjin Univ. (China)
Ge Zhou, Tianjin Univ. (China)
Dagong Jia, Tianjin Univ. (China)
Hongxia Zhang, Tianjin Univ. (China)
Li Ren, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing
Yunlong Sheng; Songlin Zhuang; Yimo Zhang, Editor(s)

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