Measurement of mode couplings and extinction ratios in polarization-maintaining fibers

Makoto Tsubokawa, Tsunehito Higashi, Yutaka Sasaki

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Polarization mode couplings in the axial direction are evaluated for polarization-maintaining fibers using optical heterodyne detection. This method makes it possible to determine the magnitudes of polarization mode couplings with higher length resolutions and wider dynamic range than can be obtained by the polarization optical time-domain reflectometry (POTDR) method. To verify the validity of this approach for fibers with various coupling constants, the method is applied to three fibers with modal birefringence values of 3.0×10-4, 1.1×10-4, and 15×10-5, respectively. The coupling constants in the 1.7×10-4m-1 to 6.4×10-7m-1 range are evaluated with a length resolution of 1 m. The extinction ratios are obtained from the coupling constants averaged over the fiber lengths. These values are in good agreement with the values measured directly from power ratios between the orthogonally polarized modes. Minimum detectable coupling magnitude, given as the product of coupling constant and fiber length, is 3×10-8 in this system.

Original languageEnglish
Pages (from-to)45-50
Number of pages6
JournalJournal of Lightwave Technology
Volume7
Issue number1
DOIs
Publication statusPublished - 1989 Jan
Externally publishedYes

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Polarization-maintaining fiber
coupled modes
extinction
fibers
Fibers
polarization
Polarization
Light polarization
Birefringence
optical polarization
dynamic range
birefringence
optical fibers
products

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Measurement of mode couplings and extinction ratios in polarization-maintaining fibers. / Tsubokawa, Makoto; Higashi, Tsunehito; Sasaki, Yutaka.

In: Journal of Lightwave Technology, Vol. 7, No. 1, 01.1989, p. 45-50.

Research output: Contribution to journalArticle

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