Apparatus for compensating chromatic and polarization dispersion

Details Apparatus for compensating chromatic and polarization dispersion Apparatus for compensating chromatic and polarization dispersion

1995-02-01

1996-12-24

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

372 29, 372 30, G02F 103

Patent

active

055878270

ABSTRACT:
Chromatic and polarization dispersion and transmitter frequency chirp are the dominant data rate limiting factors for high-speed, long distance communication systems. To overcome such limitations, a chromatic and polarization dispersion and frequency chirp compensator is utilized. The applicants provide a compensator by combining a wavelength to polarization transformer with a polarization to delay converter having a dispersion characteristic of substantially equivalent in magnitude, and opposite in sign, to the desired amount of dispersion and frequency chirp to be compensated. Optical gain may be incorporated in any of the elements of the compensator which makes the present invention a lightwave amplifier as well as a dispersion compensator. The present invention is also applicable as an optical pulse time compressor that compresses a relatively long width optical pulse to a short width pulse.

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Gnauck et al, IEEE Photonics Tech. Letters, vol. 5, No. 6, p. 663, 1993.
Treacy, IEEE Journal of Quantum Electronics, vol. 5, p. 454, 1969.

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