High-Performance Passively Q-Switched Microchip Laser

This proposal addresses the requirement to develop an ultra-compact, high-performance, passively Q-switched short pulse microchip laser that is appropriate for use in a military system environment. We plan to achieve the program goals through specific research paths and perform critical experiments that will demonstrate the effectiveness of the improvements in Phase I. In addition, to these design upgrades alternative microchip laser materials will be analysed and tested. The current baseline material is Nd:YAG. We will review alternative materials and design experiments to evaluate the suitability of additional material(s) to improve microchip laser performance in specific applications. Yb:YAG is the principal candidate since it has a very small quantum defect, low heat generation from each pulse, and Nd:YLF also offers advantages which will be considered since it has excellent polarization properties and a long fluorescent lifetime, requiring smaller pump power.