Electro-Optical Modulator for an Electro-Optically Modulated Laser.
Patent, Filed 6 Mar 81, patented 26 May 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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The present invention provides a jitter stable eletro-optical modulator for modulating a high power, repetitively pulsed laser having an optical risetime 10 to 90 of the order of nanoseconds. The electro optical modulator includes a birefringent electro-optical device a hydrogen thyratron operated at a preselected high pressure and having an ON and an OFF state first means responsive to the ON state of the thyratron for impressing a first preselected voltage across the birefringent electro-optical device second means responsive to the OFF state of the hydrogen thyratron for impressing a second preselected voltage across the electro-optical modulator at a time coincident with the laser buildup interval and means for repetitively driving the hydrogen thyratron into the ON and the OFF states repetitively at a preselected repetition rate. The selectively pressurized hydrogen thyratron is placed within a close fitting vented copper housing and is electrically connected across the electrodes of the birefringent device by an impedance matching network and a coaxial cable.
- Electrooptical and Optoelectronic Devices
- Lasers and Masers