COHERENT COMMUNICATION LINK USING DIODE-PUMPED LASERS

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 10483
Amount: $49,271.00
Phase: Phase I
Program: SBIR
Awards Year: 1989
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Lightwave Electronics Corp
897-5a Independence Ave, Mountain View, CA, 94043
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Thomas J Kane
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
OPTICAL COMMUNICATION LINKS BETWEEN GEOSYNCHRONOUS SATELLITES, OR BETWEEN DEEP SPACE PROBES AND 2 SPACE STATION ORBITTING THE EARTH, WOULD HAVE THE ADVANTAGE OF SMALLER ANTENNA SIZE AND/OR LOWER POWER CONSUMPTION THAN MICROWAVE LINKS WITH SIMILAR CAPACITY. BANDWIDTH AND SECURITY WOULD ALSO BE IMPROVED. DIODE-PUMPED SOLID STATE LASERS HAVE THE POWER, THE EFFICIENCY, AND THE BEAM QUALITY NEEDED FOR THESE LINKS. IN ADDITION, THE TECHNOLOGY OF SINGLE-FREQUENCY MONOLITHIC DIODE-PUMPED LASERS, COMMERCIALLY PIONEERED BY LIGHTWAVE, PROVIDES THE COHERENCE NEEDED TO UTILIZE COHERENT COMMUNICATION TECHNIQUES SUCH AS HETERODYNE DETECTION. HETERODYNE DETECTION PROVIDES BETTER DETECTOR SENSITIVITY, ESPECIALLY IN THE PRESENCE OF A BRIGHT BACKGROUND. LIGHTWAVE PROPOSES TO DEVELOP UNDER THIS CONTRACT A 1.32-MICRON SINGLE-FREQUENCY LASER WITH OUTPUT OF SEVERAL HUNDRED MWATT. THIS LASER WOULD BE COUPLED INTO A COMMERCIALLY-AVAILABLE GUIDED-WAVE PHASE MODULATOR WITH A BANDWIDTH OF 3 GHZ. THE MODULATED OUTPUT WOULD BE HETERODYNE-DETECTED USING ONE OF LIGHWAVE'S 5-MW SINGLE-FREQUENCY, QUICKLY-TUNABLE LASERS. THESE TUNABLE LASERS HAVE BEEN PHASE-LOCKED AT LIGHTWAVE. THE PROBLEM OF LONG-TERM FREQUENCY STABILIZATION, WHICH IS A CONSIDERATION DETERMINING SYSTEM ROBUSTNESS, WOULD BE STUDIED.

* information listed above is at the time of submission.

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