Compact Monolithic Waveguide LADAR Munitions Seeker

The goal for the next-generation laser transmitter for high-energy single-pulse LADAR seekers is to reduce size, cost, weight, and complexity, while increasing robustness and operational lifetime. Current laser transmitters (1) contain numerous free-spaceoptical components that limits the robustness and (2) are limited by thermal problems such as heat removal and temperature control. Coherent Technologies, Inc. (CTI) proposes to develop a novel compact monolithic eyesafe Er-doped 1.6-micron laser that canbe assembled with permanent optical alignment. The transmitter architecture is based on a novel waveguide laser design that has significant advantages over bulk laser designs. Key transmitter features are (1) compact high-efficiency laser diode pumpingwith simple and low cost coupling optics, (2) unique design of the Er-doped laser transmitter results in excellent thermal management for a longer operational lifetime, and (3) intrinsic laser material properties allow operation over wide ambienttemperature range. The transmitter is capable of >100 mJ output energy in a <5 ns pulsewidth, with a final cost estimate (in quantity) of less than $2000 per transmitter. CTI's proven ability to design and engineer rugged and compact laser ranging systemsfor demanding environments will ensure a successful overall development program.Anticipated applications include (1) Laser seeker transmitters for multiple platforms, (2) Low cost transmitters for other eyesafe laser remote sensing applications, (3) Laser sources for commercial markets such as materials processing, medical, andinstrumentation.