Abstract

Periodically stressing a birefringent fiber once per beat length can cause coherent coupling to occur between polarization modes. Such a birefringent-fiber polarization coupler is described here. More than 30 dB of power transfer between polarizations has been achieved. The device has been used as the output coupler of an in-line Mach–Zehnder interferometer, and better than 25-dB on/off extinction has been measured. The device is wavelength selective and can be used as a multiplexer or as a notch filter. A notch of 9-nm full width at half-maximum has been achieved with a 60-period comb structure.

© 1983 Optical Society of America

Active polarization coupler for birefringent fiber

J. L. Brooks, R. C. Youngquist, G. S. Kino, and H. J. Shaw
Opt. Lett. 9(6) 249-251 (1984)

Two-mode fiber modal coupler

R. C. Youngquist, J. L. Brooks, and H. J. Shaw
Opt. Lett. 9(5) 177-179 (1984)

Acousto-optic polarization coupler and intensity modulator for birefringent fiber

W. P. Risk and G. S. Kino
Opt. Lett. 11(1) 48-50 (1986)

Monomode-polarization-maintaining fiber directional couplers

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Measurement of polarization mode dispersion in high-birefringence fibers

W. K. Burns and R. P. Moeller
Opt. Lett. 8(3) 195-197 (1983)