Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1996-04-19
1997-08-26
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
G01N 2141
Patent
active
056615540
ABSTRACT:
A train of transform-limited optical pulses with wavelength close to the zero-dispersion wavelength of the fiber and high and variable peak power, such as to give rise to self-phase modulation, is sent into a fiber. The spectral broadening of the signal exiting the fiber is measured for a number of values of the peak power of the pulses and the nonlinear refractive index is obtained from the angular coefficient of the straight line representing spectral broadening versus peak power.
REFERENCES:
Namihira et al "Nonlinear Coefficient Measurements for Dispersion Shifted Fibres Using Self-Phase Modulation Method at 1.55 .mu.m", Electronics Letters, vol. 30, No. 14 7 Jul. 1994, pp. 1171-1172.
Polarization Multiplexing with Solitons, Journal of Lightwave Technology, vol. 10, No. 1, Jan. 1992 pp. 28-35.
The Supercontinuum Laser Sosurce, Robert R. Alfano, Editor, Springer-Verlag, 1989 pp. 34-40.
Measurement of the Nonlinear Index of Silica-Core, Feb. 15, 1994, Optics Letters pp. 257-259.
Fiber Nonlinearity, Robert Tkach, AT&T Laboratories, OFC '95 Technical Digest pp. 312-313.
Nonlinear Coefficient Measurements for Dispersion Shifted Fibers, Namihira et al, Electronics Letters, 7 Jul. 1994, vol. 30 #14, pp. 1171-1172.
Calvani Riccardo
Caponi Renato
Naddeo Claudio
Roccato Diego
CSELT--Centro Studi E Laboratori Telecomunicazioni S.p.A.
Dubno Herbert
McGraw Vincent P.
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