Underwater laser system

Mark E. Kushina; Geoff Heberle; Michael Hope; Ryan M. Crittenden; Michael Bethel

doi:10.1117/12.459010

13 March 2002 Underwater laser system

Mark E. Kushina, Geoff Heberle, Michael Hope, Ryan M. Crittenden, Michael Bethel

Proceedings Volume 4630, Solid State Lasers XI; (2002) https://doi.org/10.1117/12.459010
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

We have developed a solid-state laser operating at 532nm for underwater topographic investigations. The laser system is integrated into a torpedo-like 'towed-body', with the military designation of AQS-20. This laser, along with other sophisticated receiver opto-electronic systems enables detailed underwater bathymetry. CEO designed and manufactured the laser portion of this system. The laser sub-system is comprised of two separate parts: the LTU (Laser Transmitter Unit) and the LEU (Laser Electronics Unit). The LTU and LEU where put through Mil-standard testing for vibration, shock and temperature storage and operation extremes as well as Mil-461C EMI/EMC testing. The Nd:YAG laser operates at a 400 Hz pulse repetition frequency and is controlled remotely, tethered to the system controller in a ship or helicopter. Power monitor circuits allow real time laser health monitoring, which enables input parameter adjustments for consistent laser behavior. The towed body moves forward at a constant rate of speed while this underwater LIDAR system gathers data. All heat generated must be conducted into the outer hull of the towed-body and then, to the surrounding ambient ocean water. The water temperature may vary from 0-35 degrees C.

Citation Download Citation

Mark E. Kushina, Geoff Heberle, Michael Hope, Ryan M. Crittenden, and Michael Bethel "Underwater laser system", Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002); https://doi.org/10.1117/12.459010

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