CST Global Gets Funding to Continue Work on Blue Laser Diodes for Laser-Cooled Quantum Sensing

CST Global, a wholly-owned subsidiary of Sivers IMA Holdings AB and an independent, III-V optoelectronic, semiconductor foundry, will lead the government-funded, “Quantum Cooling using Mode Controlled Blue Lasers” project.  Dr. Thomas Slight, a CST Global research engineer, will manage the ‘CoolBlue2” project, as it is known.

CST Global will get support from commercial partner, Helia Photonics Ltd., research partner, National Physical Laboratory Ltd., and academic partners, Aston University and the University of Glasgow. The CoolBlue2 project, which will run from April 2018 to March 2019, will cost a total of £499,076, including government funding of £410,209. CST Global will receive £83,774 of this funding.

Dr. Thomas Slight explained the project, “CoolBlue2 investigates the feasibility of developing a fully monolithic, narrow linewidth, GaN DFB laser. They will operate in the 4XXnm region and will be used as a source in laser-cooled, quantum sensing systems, such as quantum clocks, gravimeters and magnetometers. Other applications include atomic spectroscopy, subsea communications and medical instrumentation.”

Dr. Thomas Slight indicated that the CoolBlue2 project continues the previous work on developing GaN laser technology for making quantum sensors based on ultracold atoms. The increased power, lower complexity and smaller size that they previously achieved with the direct, blue laser diode source demonstrated that it was possible to transform quantum sensors from ‘laboratory instruments’ into miniaturized, robust systems.

Dr. Slight noted that the funding supports two iterations of chip design and manufacture with the goal of fabricating a laser for evaluation in a real-world, low-cost, integrated system.