Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1991-01-15
1992-10-20
Moskowitz, Nelson
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359183, 385 3, H04B 900, H04L 900
Patent
active
051575426
ABSTRACT:
An optical FM modulation system includes a continuous wave optical light source for producing an optical carrier wave; integration means, responsive to an FM modulating signal, for generating a phase signal representative of the phase variations corresponding to the frequency variations of the FM modulating signal; and an electro-optic phase modulator, responsive to the electrical signal representative of the phase variations, for shifting the phase of the optical carrier wave to modulate the frequency of the optical carrier wave as a function of the modulating signal.
REFERENCES:
patent: 3666956 (1972-05-01), Willisen
patent: 4123719 (1978-10-01), Hopwood et al.
patent: 4726064 (1988-02-01), Kishi et al.
Fitzmartin et al.; "Wide-Band Analog Frequency Modulation of Optic Signals Using Indirect Techniques"; Proc. SPIE, Int. Soc. Opt. Eng., San Jose, Ca., Sep. 18, 1990, vol. 1371, pp. 78-86.
Balboni Edmund J.
Fitzmartin Daniel J.
Moskowitz Nelson
The Charles Stark Draper Laboratory Inc.
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