Ship/Aircraft Communication and Tracking Using a 2-Micron Laser and a Membrane-Mirror Retroreflector

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 27843
Amount: $63,404.00
Phase: Phase I
Program: SBIR
Awards Year: 1995
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
45 Winthrop Street, Concord, MA, 01742
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John H. Flint
 (508) 371-2299
Business Contact
Phone: () -
Research Institution
We propose to develop an optical line-of-sight communication and tracking link to enable secure voice and data transfer between aircraft and ship during landing approach. The system will be based on an existing compact, diode-pumped, Tm,Ho:YLF laser (mounted on the carrier) and a extremely compact modulatable retroreflector (mounted on the aircraft) which is constructed with membrane mirrors. The 2- micron laser has been developed for lidar applications, and produces up to 4.6 W of CW, TEM, power. The membrane mirrors are commercially available (manufactured by Optron Systems, Inc.) and can be modulated at rates of 1 MHz or more. Simultaneous ship-to-aircraft communication would be effected by modulating the CW laser electro- optically at tens of megahertz, whereas aircraft-to-ship communication would be accomplished by modulating the return signal with the retroreflector. The proposed system would acquire the retroreflected signal, perhaps using the modulation to enhance the signal, then switch to a communication mode while a quadrant detector/tracking system automatically maintains the laser pointing at the aircraft. The proposed Phase I effort consists of a feasibility study and the testing of a membrane mirror. A prototype system would be constructed and tested under a following Phase II.

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

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