Method and apparatus for optical broadband frequency chirp

Details Method and apparatus for optical broadband frequency chirp Method and apparatus for optical broadband frequency chirp

2008-06-24

2008-06-24

Dang, Hung X. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S264000, C359S287000, C398S187000, C398S199000

Reexamination Certificate

active

07391550

ABSTRACT:
Techniques for producing an optical broadband frequency sweep or chirp, include generating a narrowband frequency chirp and a frequency-shifted replica. The narrowband chirp has an optical carrier frequency, a pulse duration and a pulse bandwidth. A frequency-shifted replica is generated by frequency shifting the narrowband chirp by a frequency shift. Adding the frequency-shifted replica after a start of the narrowband chirp by a delay generates a broadband frequency chirp. Alternatively, the frequency-shifted replica is generated by frequency shifting a constant frequency pulse, and modulating the frequency-shifted pulse to generate narrowband chirps that are added to form the broadband chirp.

REFERENCES:
patent: 3932818 (1976-01-01), Masak

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