Chirp measurement apparatus

Details Chirp measurement apparatus Chirp measurement apparatus

2005-10-25

2005-10-25

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C398S147000

Reexamination Certificate

active

06958467

ABSTRACT:
A chirp measurement apparatus includes a splitting section for splitting input signal light to two paths; a first dispersion medium with a total dispersion amount of +D (≠0) at a used wavelength, and a second dispersion medium with a total dispersion amount of −D (≠0) at the used wavelength;first and second nonlinear photo-detecting sections for receiving the signal light beams passing through the first and second dispersion media, and for outputting electric signals with the intensities proportional to nth power of the intensities of the signal light beams, where n is greater than one; and a difference detecting section for computing a difference between the electric signals output from the first and second nonlinear photo-detecting sections, and for outputting a differential signal corresponding to the difference as a chirp signal of the input signal light.

REFERENCES:
patent: 0 502 422 (1992-09-01), None
patent: 2001-053679 (2001-02-01), None
Inui et al., “Adaptive dispersion slope equalizer for dispersion-shifted fibers using a nonlinearly chirped fiber Bragg grating pair”, Lasers and Electro-Optics, CLEO/Pacific Rim 2001., Jul. 15-19, 2001, pp. 14-15 suppl.
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