Optical pulse equalization in single-mode fibers

Details Optical pulse equalization in single-mode fibers Optical pulse equalization in single-mode fibers

1979-11-13

1981-04-14

Levy, Stewart J.

350 9630, G02B 514

Patent

active

042616395

ABSTRACT:
An optical pulse equalization technique for minimizing pulse dispersion in a single-mode fiber transmission system where there is a mismatch between the optical source (1) wavelength and the wavelength at which a transmission single-mode fiber (2) has a zero total dispersion utilizes the positive and negative dispersion characteristics of single-mode fibers on both sides of the zero total dispersion wavelength. A second equalizer single-mode fiber (3) is used as an optical equalizer. This equalizer single-mode fiber has the property that the optical source wavelength lies at a value which is between the zero dispersion wavelengths of the transmission and equalizer single-mode fibers. The transmission fiber and the equalizer fiber have different dispersion signs at the source wavelength and the length of the equalizer fiber is chosen to be equal to the length of transmission fiber times the ratio of the dispersions for the fibers at the source wavelength.

REFERENCES:
L. G. Cohen et al., "Pulse Delay Measurements in the Zero Material Dispersion Wavelength Region for Optical Fiber", Appl. Opt. vol. 16, No. 12, Dec. 1977.
L. G. Cohen et al., "Tailoring Zero Chromatic Dispersion into the 1.5-1.6.mu.m Low-Loss Spectral Region of Single-Mode Fibers", Electronic Letts., vol. 15, No. 12, Jun. 1979.
S. Machida et al., "1.5 .mu.m Optical Transmission Experiments Using Very Low-Loss Single-Mode Fibers", Electronics Letts. vol. 15, No. 8, Apr. 1979.

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