Fuceltech Inc — Department of Defense SBIR Phase I: MDA20-004

Description

MDA is interested in developing single mode high power diode lasers with excellent beam quality and high efficiency and coherently combine them for high power output and use the coherently combined modules to build high power direct diode laser (HPDDL) systems capable of achieving upwards of 10-100 kW (dependent on the beam combining technique) of high output power while maintaining the beam quality to a near diffraction limited spot size (M2< 1.2) in a low SWaP configuration. We propose an approach for single mode VCSELs and for coherently combining them for very high power with the eventual goal of application in the HPDDL systems. Diode laser based high power systems will be small, high efficiency (close to 70%) and much lower cost compared to current fiber laser based approaches. Princeton Innotech offers an approach for high power single mode diode lasers and coherently coupling them for multi-kW single modules. We have successfully experimented with such coherent coupling approaches in the past. In phase I, we plan to do the design and simulations for a high power single mode VCSEL and develop single mode high power VCSELs and coherently coupled arrays in phase II. We plan to further develop the high power coherently coupled modules and commercialize them in phase III. Approved for Public Release | 20-MDA-10643 (3 Dec 20)