A single-polarization fiber

Author

Simpson, J.R. ; Stolen, R.H. ; Sears, F.M. ; Pleibel, W. ; MacChesney, J.B. ; Howard, R.E.

Author_Institution

AT&T Bell Laboratories, Murray Hill, NJ, USA

Volume

1

Issue

2

fYear

1983

fDate

6/1/1983 12:00:00 AM

Firstpage

370

Lastpage

374

Abstract

We report an oPtical fiber which guides only one polarization. This fiber polarizer utilizes high modal birefringence ( $4.7 \\times 10^{-4}$ ) to split the two polarizations of the fundamental mode and an ellipitcal depressed-index cladding to provide a steep wavelength-dependent tunneling loss to the fast axis mode. The stress-induced birefringence is created by an elliptical SiO2-B2O2inner cladding. A 4.7-m length of polarizer fiber exhibits an extinction ratio of 34 dB at a wavelength of 633 nm, with polarizing behavior over a bandwidth of 50 nm. Insertion loss of less than 1 dB has been observed for the guided linear-polarization mode. The polarizing band may be shifted from 620 to 525 nm by bending the fiber to a radius of 0.67 cm. Such fiber polarizers should find a variety of applications in fiber sensors, attenuators, isolators, wavelength filters, and tuners.

Keywords

Optical fiber applications; Optical polarization; Optical refraction; Attenuators; Bandwidth; Birefringence; Extinction ratio; Insertion loss; Optical fiber losses; Optical fiber polarization; Optical fiber sensors; Optical fibers; Tunneling;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.1983.1072129

Filename

1072129