Method, device, and system for processing optical signal

Details Method, device, and system for processing optical signal Method, device, and system for processing optical signal

2006-07-11

2006-07-11

Phan, Hanh (Department: 2638)

Optical communications

Transmitter and receiver system

Including compensation

C398S140000, C398S141000, C398S147000, C398S146000, C398S148000, C398S173000, C398S175000, C398S179000, C398S079000, C398S080000, C398S081000, C398S097000, C385S024000, C385S037000, C385S027000, C385S001000, C385S038000, C385S122000, C385S123000

Reexamination Certificate

active

07076174

ABSTRACT:
The present invention relates to a method for processing an optical signal is provided. An optical signal is input into an optical waveguide structure for providing a nonlinear effect. As a result, the optical signal undergoes chirping induced by the nonlinear effect. An output optical signal output from the optical waveguide structure is supplied to an optical bandpass filter to thereby extract components except a small-chirp component from the output optical signal. The optical bandpass filter has a pass band including a wavelength different from the wavelength of the optical signal. By extracting the components except the small-chirp component from the output optical signal in the form of pulse, it is possible to remove intensity fluctuations or accumulated noise especially at a top portion and/or a low-power portion of the pulse.

REFERENCES:
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patent: 6674973 (2004-01-01), Leclerc et al.
patent: 2001/0013965 (2001-08-01), Watanabe
patent: 2004/0005153 (2004-01-01), Watanabe
W.J. Tomlinson, et al., “Compression of Optical Pulses Chirped by Self-Phase Modulation in Fibers”, J. Opt. Soc Am. B., vol. 1, No. 2/Apr. 1984, pp. 139-149.
R. H. Stolen, et al., “Self-Phase-Modulation in Silica Optical Fibers”, Physical Review A, vol. 17, No. 4, pp. 1448-1453.
H.H. Kuehl, “Solitons on an Axially Nonuniform Optical Fiber”, J. Opt. Soc. Am. B., vol. 5, No. 3/Mar. 1988, pp. 709-713.
L. F. Mollenauer, et al., “Extreme Picosecond Pulse Narrowing By Means of Soliton Effect in Single-Mode Optical Fibers”, Optics Letters, vol. 8, No. 5, May 1983.

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