High-Power, Narrow Linewidth Laser Diodes for Alkali Atoms

This Phase II proposal describes the work to be performed by Photodigm to produce high power and narrow linewidth DBR lasers at key strategic wavelengths for applications in alkali atom physics. These DBR lasers will operate at the D1 transition wavelengths of Rubidium (795 nm) and Cesium (894 nm), and the D1 and D2 wavelengths for Potassium (767 nm and 770 nm). Additionally, low power (5 mW to 10 mW) high-efficiency spectroscopic grade 852 nm lasers for operation at high temperatures will be developed. These low power lasers will reliably operate in a power, efficiency, and linewidth performance regime where there is currently no other available laser source. This work is based on Photodigm’s previous success in developing class leading high power DBR lasers at 852 nm under the Phase I effort along with previous development of spectroscopic grade DBR lasers at 780nm. Completion of this project will provide enabling technology in support of ongoing DARPA and other DOD development projects as well as several newly emerging commercial applications. These specifically include the integrated micro-primary atomic clock (IMPACT) program, as well as advanced magnetometer, precision inertial guidance, and other applications in atom-optics and cold-atom physics.