Edge-pumped Composite Power Amplifiers

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-05-C-7157
Agency Tracking Number: 044-1401
Amount: $99,956.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: MDA04-178
Solicitation Number: 2004.4
Small Business Information
20 New England Business Center, Andover, MA, 01810
DUNS: 073800062
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Kevin Wall
 Senior Research Scientist
 (781) 275-9535
 kwall@qpeak.com
Business Contact
 David Green
Title: President PSI R&D Operations
Phone: (978) 738-8146
Email: green@psicorp.com
Research Institution
N/A
Abstract
Advanced amplifier designs that are durable, efficient, light weight, and compact are required for the next generation heterodyne laser radar systems such as the Advanced Discriminating Ladar Technology Program. We propose to address the need for improved amplifier technology through the use of a side-pumped composite structure to convert low brightness pump sources into usable population inversion. The pump sources will be coupled to the laser medium crystal using simple optics and scaling of the pump power will be achieved by using stacked diode laser bars. One potential component of the composite structure, ceramic Nd:YAG, will allow for flexibility in the active ion doping density (up to 6% Nd) for efficient pump absorption over short lengths. In our proposed design, heat is removed from the composite laser structure by direct contact to heat sinks; flowing liquid contacting the crystal is not required as it is in many high-average-power laser schemes, allowing the use of a wide variety of cooling techniques. Thermal lensing, which can cause aberration of the output beam, is kept low by spreading the heat load over a large area and minimizing the distance between the heat load and heat sinks.

* Information listed above is at the time of submission. *

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