Cryogenic High Power Laser Pump Diodes

Period of Performance: 01/18/2008 - 01/19/2009


Phase 1 SBIR

Recipient Firm

Directed Energy Solutions
890 Elkton Drive, Suite 101
Colorado Springs, CO 80907
Principal Investigator


Directed Energy Solutions is proposing to develop a compact, high-efficient cryogenic diode laser stack for optical pumping of a Yb:YAG laser. In phase I, Directed Energy Solutions will design, fabricate and test a 1 kW cryogenic stack. Multiple lensing techniques will be examined and tested. The operation wavelength will be 940 nm for efficient pumping of Yb:YAG. To accomplish this aggressive goal, Directed Energy Solutions will leverage existing cryogenic diode laser efforts, which have demonstrated world-record diode laser efficiencies of 84 % and the first all cryogenic Yb:YAG laser. In phase II of this effort DES will scale the device to the 5 kW level.