Accession Number:

ADD013488

Title:

Electro-Optical Modulator for an Electro-Optically Modulated Laser.

Descriptive Note:

Patent, Filed 6 Mar 81, patented 26 May 87,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1987-05-26

Pagination or Media Count:

6.0

Abstract:

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.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE