Compact Microlaser and Rangefinder

A novel 1.57 micron eye-safe micro laser and rangefinder are proposed. The concept results in a laser and detection system with a total weight with batteries of less than 4 ounces each for the micro-transmitter and the miniaturized detection system. Using novel, state of the art laser modeling codes to support our design, we have quantified a range of options for the transmitter and system design. From this we selected a compact, diode pumped Nd laser plus OPO for our concept. Our proposed effort will combine engineering design, laser modeling and breadboard experiments to arrive at an optimum approach for Phase II. The concept features a novel optical parametric oscillator cavity. Low thresholds and over 120microJ outputs are predicted. The predicted pulse durations are under 5ns, ideal for ranging. For the same drive diode power, the conventional OPO cavity is closer to threshold and produces considerably less power. Breadboard experiments will be used to understand the range of operation for both cavities. The critical interfaces and design options for mating the sensor to the host system will be identified in Phase I. BENEFITS: The micro-laser-rangefinder will expand the range of applicability this modern military tool to a broad class of infantry users, resulting in a more effective and cost effective Army. The technology developed will also be useful in civilian applications such as micro-machining. robotic control and altimetry.