Nonlinear optical signal-treating apparatus

Optical waveguides – Having nonlinear property

Reexamination Certificate

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C385S095000, C385S033000

Reexamination Certificate

active

07551822

ABSTRACT:
A nonlinear optical signal-treating apparatus can suppress the distortion of pulse light to be inputted into an optical fiber to an allowable level or less. The apparatus comprises a pulse light source for outputting first pulse light, a first optical fiber, a second optical fiber that is spliced with the first optical fiber and has a mode-field diameter smaller than that of the first optical fiber, and a light-introducing system for inputting the first pulse light into the first optical fiber. The second optical fiber receives the first pulse light and generates second pulse light having a newly produced wavelength. The peak power ratio of the first pulse light outputted from the first optical fiber to that inputted into the first optical fiber and the pulse width ratio of the first pulse light outputted from the first optical fiber to that inputted into the first optical fiber are 0.5 to 1.5.

REFERENCES:
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patent: 1 801 643 (2007-06-01), None
European Search Report issued in European Patent Application No. EP 0602697.7-1228 dated Feb. 20, 2008.
Hori, T. et al., “Flatly broadened, wideband and low noise supercontinuum generation in highly nonlinear hybrid fiber,” Optics Express Opt. Soc. America USA, vol. 12, No. 2, Jan. 26, 2004.
Westbrook P. S., et al., “US processing of highly nonlinear fibers for enhanced supercontinuum generation,” Optical Fiber Communication Conference, 2004, vol. 2, Feb. 2004, pp. 737-739.
Gupta D. et al., “Nonlinear pulse propagation in dispersion decreasing fibers,” Optical Communications vol. 237, No. 4-6, Jul. 15, 2005, pp. 309-317.

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