GROWTH OF FLUORIDE LASER CRYSTALS WITH ELECTROCHEMICAL MONITORING AND CONTROL OF COMPOSITION AND PURITY

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$40,000.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
5221
Agency Tracking Number:
5221
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
111 Downey St, Norwood, MA, 02062
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
Dr. Sydney H. White
Group Leader
() -
Research Institute:
n/a
Abstract
VARIETY OF SOLID STATE LASERS BASED ON LUMINESCENT TRANSITION METAL OR RARE EARTH IONS IN FLUORIDE HOSTS SHOW GREAT PROMISE FOR HIGH EFFICIENCY BROAD TUNABILITY. THE PURITY OF THE CRYSTALS, WITH RESPECT TO OXIDE/HYDROXIDE,FOREIGN METAL IONS AND VALENCE STATE ON THE LUMINESCING IONS, IS CRITICAL TO PERFORMANCE AND REPRODUCIBILITY. THE COMPOSITION OF THE MELT PRIOR TO AND DURING CRYSTAL GROWTH CAN BE MONITORED AND CONTROLLED USING IN SITU ELECTROCHEMICAL PROBES. IT IS PROPOSED FOR PHASE I TO DEMONSTRATE THE APPLICATION OF HIGH TEMPERATURE MOLTEN SALT ELECTROCHEMICAL METHODS TO PURITY CONTROL IN ONE LASER MATERIAL, SRA1F5:CR+3. VOLTAMMETRY WILL BE EMPLOYED AS AN ELECTRO-ANALYTICAL METHOD FOR QUANTITATING WATER (AND HYDROLYSIS PRODUCTS) IN THE MELT, AS WELL AS THE PRESENCE OR EVOLUTION OF UNDESIRABLE CR+2. STEADY STATE ELECTROLYSIS METHODS WILL BE EMPLOYED FOR REMOVING OXIDES AND HYDROXIDES, OXIDIZING CR+2 TO CR+3, AND INTRODUCING CR+3 DIRECTLY FROM A HIGH PURITY CR METAL SOURCE.

* information listed above is at the time of submission.

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