DEVELOPMENT OF SYSTEMS FOR CONTINUOUS TUNING AND SINGLE MODE OPERATION OF SOLID STATE LASERS

Award Information
Agency:
National Aeronautics and Space Administration
Branch:
N/A
Amount:
$494,396.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
N/A
Agency Tracking Number:
12094
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Science & Engineering Services
17 Serpentine Ct., Silver Spring, MD, 20904
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 Hyo Sang Lee
 Principal Scientist
 (301) 236-4161
Business Contact
 HYO SANG LEE
Title: PRESIDENT
Phone: (301) 236-4161
Research Institution
N/A
Abstract
NARROW BAND, STABLE, SINGLE LONGITUDINAL MODE CONTINUOUSLY TUNABLE SOLID STATE LASERS ARE REQUIRED FOR A NUMBER OF APPLICATIONS SUCH AS LIDARS, HIGH RESOLUTION SPECTROSCOPY, ETC. IT IS PROPOSED TO DEVELOP A TUNABLE, NARROW BAND ( 0.001 CM(-1), STABLLE ( 0.0005 CM(-1) ALEXANDRITE LASER BY INJECTION SEEDING THE LASER OSCILLATOR WITH A STABLE TUNABLE DIODE LASER. THE OUTPUT FREQUENCY OF THE DIODE LASER WILL BE PRECISELY TUNED AND CONTROLLED BY USING A DIGITAL WAVEMETER AND FEEDBACK MECHANISM. A LARGE ARRAY DETECTOR AND A SPECIFIC ALGORITHM WILL BE USED TO PROCESSES THE WAVEMETER OUTPUT, WHICH TOGETHER WITH A STABLE FREQUENCY REFERENCE WILL ACHIEVE THE REQUIRED ACCURACY. A COMMERCIALLY AVAILABLE ALEXANDRITE LASER WILL BE USED FOR THIS SYSTEM. HOWEVER, A RING LASER CONFIGURATION IS PROPOSED FOR INJECTION SEEDING. THE DIODE LASER BEAM WILL BE INJECTED THROUGH AN OPTICAL ISOLATOR INTO THE RING IN THE DIRECTION OPPOSITE TO THAT OF THE LASER OUTPUT. THE LENGTH OF THE LASER RESONATOR CAVITY WILL BE PRECISELY CONTROLLED DYNAMICALLY WITH AN ACTIVE ELEMENT TO MATCH THE RESONATOR MODE FREQUENCY WITH THE INJECTION SEEDING FREQUENCY. TRUE SINGLE LONGITUDINAL MODE OPERATION OF THE LASER WILL BE ACHIEVED BY USING A HIGHRESOLUTION WAVEMETER INTERFACED WITH THE ACTIVE CAVITY ELEMENT OF THE LASER RESONATOR AS THE FEEDBACK ELEMENT.

* information listed above is at the time of submission.

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