SEMICONDUCTOR LASER EXCITED UPCONVERSION TRANSITIONS IN HOLMIUM (SLEUTH)

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$245,722.00
Award Year:
1993
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
15212
Agency Tracking Number:
15212
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
12777 High Bluff Drive, San Diego, CA, 92130
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Bradley Mells
Principal Investigator
(619) 755-0700
Business Contact:
() -
Research Institution:
n/a
Abstract
A BLUE-GREEN LASER IS PROPOSED WHICH IMPLEMENTS UPCONVERSION ENERGY TRANSFER PROCESSES TO EXCITE THE 5G6 5I8 LASER TRANSITION IN HO3+ IS HIGHLY PROMISING FOR SUBMARINE COMMUNICATIONS APPLICATIONS AS THE WAVELENGTH OF THIS TRANSITION IS EXTREMELY CLOSE TO THE 6S1/2 7P3/2 RESONANT ADSORPTION IN CESIUM (455.66NM). THE RESULTS OF CALCULATIONS APPLYING THE JUDD-OFELT APPROXIMATIONS INDICATE A LARGE OSCILLATOR STRENGTH CORRESPONDING TO THIS LASER TRANSITION. THE PROGRAM WILL INVESTIGATE 455 NM STIMULATED EMISSION IN HO:BAY2F8. THISHOST LATTICE IS PROMISING FOR UPCONVERSION PUMPING SINCE IT SUPPORTS UPCONVERSION VIA PAIR PROCESSES FOR EFFICIENT LASER OPERATION. IN ADDITION THIS CRYSTAL HAS LOW ASSOCIATED PHONON ENERGIES, SUBSTANTIALLY REDUCING THE PROBABILITY OF UPPER LASER LEVEL DEPLETION THROUGH NON-RADIATIVE TRANSITIONS. THE 5I8 5I5 PUMP TRANSITION AT 908 NM IS COMPATIBLE WITH STRAINED LAYER INGAAS QUANTUM WELL TECHNOLOGY. THIS IS A VIABLE PUMP LASER TECHNOLOGY SINCE STRAINED QUANTUM WELL DEVICES HAVE DEMONSTRATED HIGH RELIABILITY WITH STRAINED LAYERS NEAR THE CRITICAL THICKNESS. THE 908 NM OUTPUT REQUIRED ACCOMMODATES MUCH NARROWER STRAINED LAYER THICKNESSES RESULTING IN REDUCED STRESS ON THE ACTIVE LAYER AND IMPROVED RELIABLITY OF THE DIODE LASER PUMP SOURCE. ANTICIPATED BENEFITS/POTENTIAL COMMERCIAL APPLICATIONS - THE PROPOSED SYSTEM HOLDS PROMISE FOR EFFICIENT GENERATION OF NARROWBAND LASER RADIATION WHICH ISCOMPATIBLE WITH THE CS ATOMIC RESONANCE FILTER. IN ADDITION TO SUBMARINE COMMUNICATIONS, THE BLUE-GREEN OUTPUTS ARE SUITABLE FOR APPLICATIONS IN FLUORESCENCE SPECTROSCOPY, HIGH RESOLUTION IMAGING, MEASUREMENTSAND CONTROL SYSTEMS AS WELL AS OPTICAL MEMORY TECHNOLOGY. OTHER IMPORTANT APPLICATIONS WILL UTILIZE

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government