DEVELOPMENT OF A COMPACT 2 UM COHERENT LASER RADAR VIBRATION SENSOR

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: N/A
Agency Tracking Number: 15164
Amount: $241,307.00
Phase: Phase II
Program: SBIR
Awards Year: 1993
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Coherent Technologies Inc.
Po Box 7488, Boulder, CO, 80306
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Charles Henderson
 Principal Investigator
 (301) 839-1571
Business Contact
Phone: () -
Research Institution
N/A
Abstract
REMOTE SENSING OF VIBRATIONS USING COHERENT LASER RADAR (CLR) HAS BEEN IDENTIFIED AS A MEANS OF IDENTIFYING REMOTE TARGETS BY ANALYSIS OF CHARACTERISTIC VIBRATION SPECTRA. CO2 LASER TECHNOLOGY HAS BEEN USED IN EFFORTS UP TO THE PRESENT. RECENT ADVANCES IN EYESAFE ( 1.4 UM) SOLID-STATE LASER AND LASER RADAR TECHNOLOGY POINT TO A MORE SENSITIVE, COMPACT, SHORTER WAVELENGTH ALTERNATIVE, HIGHLY COMPATIBLE WITH THE REQUIREMENTS OF A RUGGEDIZED REMOTE VIBRATION SENSOR. IN PARTICULAR, A TM,HO:YAG CLR HAS RECENTLY BEEN DEMONSTRATED BY RESEARCHERS AT COHERENT TECHNOLOGIES, INC. TO BE A VERY SENSITIVE, LONG-RANGE EYESAFE SYSTEM OPERATING AT 2.1 UM WAVELENGTH. OPERATION AT THIS WAVELENGTH WOULD RESULT IN A MINIMUM DETECTABLE VIBRATION AMPLITUDE OF ROUGHLY ONE-FIFTH THAT OF A COMPARABLE CO2 SYSTEM. RAPID ADVANCES IN DIODE-PUMPED 2 UM LASER TECHNOLOGY AT CTI AND ELSEWHERE STRONGLY SUGGEST THAT A HIGH POWER, CW SINGLE-FREQUENCY TM,HO:YAG TRANSMITTER IS FEASIBLE HAVING THE OUTPUT POWER AND FREQUENCY STABILITY REQUIRED FOR VIBRATION SENSING APPLICATIONS. THIS PHASE I EFFORT WILL DETERMINE THE PRELIMINARY DESIGN OF A 2 UM COHERENT VIBRATION SENSOR AND DEMONSTRATE A HIGH POWER (1-2W CW) DIODE-PUMPED TRANSMITTER PROTOTYPE. ANTICIPATED BENEFITS/POTENTIAL COMMERCIAL APPLICATIONS - NUMEROUS MILITARY AND COMMERCIAL APPLICATIONS EXIST FOR A COMPACT, EFFICIENT EYESAFE REMOTE VIBRATION SENSOR. MACHINE VIBRATION ANAYLSIS IN INDUSTRIAL ENVIRONMENTS WOULD DIRECTLY BENEFIT FROM THE PROPOSED INSTRUMENT. SIMILAR TRANSMITTERS EMPLOYING PULSED OPERATION WOULD FIND IMMEDIATE USE IN HELICOPTER WIRE AVOIDANCE, METEOROLOGICAL RESEARCH, ON-BOARD WIND SHEAR AVOIDANCE, POLUTION MONITORING, AND GROUND-BASED WIND SENSING SYSTEMS.

* information listed above is at the time of submission.

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