High-speed frequency modulation signal source and high-speed var

Details High-speed frequency modulation signal source and high-speed var High-speed frequency modulation signal source and high-speed var

1996-01-03

1998-09-22

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359308, G02F 111, G02F 133

Patent

active

058123024

ABSTRACT:
Disclosed is a high-speed frequency modulation signal source which has a voltage-controlled oscillator to which a voltage is input to change an oscillation frequency; and a frequency down converter in which a frequency output from the voltage-controlled oscillator is converted into a desired frequency. Also disclosed is a high-speed variable optical wavelength filter which has the above high-speed frequency modulation signal source; a band-pass filter in which a frequency component is extracted from the desired frequency output from the high-speed frequency modulation signal source; and an acousto-optic filter which is driven by the frequency component output from the band-pass filter.

REFERENCES:
patent: 3644015 (1972-02-01), Hearn
patent: 3701583 (1972-10-01), Hammond
patent: 4394060 (1983-07-01), Verber et al.
patent: 4872746 (1989-10-01), Kobayashi
patent: 5357097 (1994-10-01), Shiozawa et al.
Chang et al, "Programmable Acousto-Optic Filter," Ultrasonics Symposium, New Orleans, La. (Sep. 1979), pp. 40-45.
Conroy et al, "Microcomputer-controlled tunable acousto-optic filter," SPIE-Active Optical Devices, vol. 202 (1979), pp.33-39.
A. D'Alessandro, et al., "Multichannel Operation of an Integrated Acousto-Optic Wavelength Routing Switch for WDM Systems", IEEE Photonics Technology Letters, vol. 6, No. 3, Mar. 1994, pp. 390-393.
S.E. Harris, et al., "Acousto-Optic Tunable Filter", Journal of the Optical Society of America, vol. 59, No. 6, Jun. 1969, pp. 744-747.

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