Aqwest liquid-cooled disk laser gain modules offer operation at higher pulse repetition rate and average power. The liquid-cooled EPDL modules are operable at 1 or 2 micron wavelength depending on the choice of laser gain material and pump diodes. Current aperture sizes range from 12.5 to 27 mm and stored energy from 1 to 5 Joules.
We developed the original flat EPDL module for the US Army in 2011 and operated 2 modules in a multi-pass amplifier in 2013. A self-contained version of the multi-pass amplifier was developed for the U.S. DOE in recent years.
To attain higher pulse energies and average power requires an amplifier with multiple modules. To package multiple modules into a scalable amplifier, we designed a new laser disk amplifier module (dubbed Module C) with universal architecture that supports broadband amplification at each 1 and 2 micron wavelengths, a range of aperture sizes, and stored pulse energies up to 5 Joules. The new laser module is self-contained and remarkably compact, which allows convenient integration of multiple modules into a very powerful amplifier used for short and ultra-short pulse lasers (latter being also known as ultrafast lasers or UFL). Module C is operable at high-pulse energy and high-pulse repetition rate need for the generation and heating of high-density energy plasmas now being pursued worldwide as a part of the “second laser revolution.” Other applications include commercial laser material processing such as cutting, drilling, and welding. When operated at 2 micron wavelength, Module C is 100-times eye-safer that the commonly used 1-micron wavelength lasers. The compact EPDL produced first laser light in April 2022. This project is supported by the US Department of Energy (DOE).
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