Brassboard Laser Transmitter.
Abstract
This report describes the efforts on a 10 month program whose objective was the design, development and delivery of a mode-locked internally frequency doubled Nd:YAG laser operating at 500 MHz prf with an average output power of 250 mW at 0.53 micrometers or 1.0W at 1.06 micrometers (TEM (Sub oo) mode) with a pulse width of less than 300 ps (measured at 10% amplitude points). Further constraints were that the laser be conduction cooled and the maximum power into the pump lamp be 250W. The approach utilized a 4 mm bore diameter, protected end seal Potassium-Rubidium (K-Rb) lamp as a pump source in a cold mirror pump cavity with a 3 mm diameter by 54.5 mm long rod conductively cooled with heat pipes. A three mirror L shaped resonator was used to allow efficient coherent combination of the two green beams generated in a 5 mm cube Barium-Sodium-Niobate (BSN) crystal. The internal 1.06 micrometers beam was focused into the doubling crystal with a 7.5 cm focal length lens. Modelocking at the cavity c/2L frequency was achieved with both an acousto-optic modulator and an electro-optic modulator. The doubler crystal served as the electro-optic modulator material. During the program, it was determined that great enough mode-locking depth was not available from state-of-the-art mode-lockers to allow for short pulses simultaneously with high conversion rate to the green.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1973
- Accession Number
- AD0915701
Entities
People
- Richard S. Reynolds
Organizations
- Sylvania Electric Products