14 April 2008 Overview of Sandia's fiber laser program
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Abstract
Sandia National Laboratories' program in high-power fiber lasers has emphasized development of enabling technologies for power scaling and gaining a quantitative understanding of fundamental limits, particularly for high-peak-power, pulsed fiber sources. This paper provides an overview of the program, which includes: (1) power scaling of diffraction-limited fiber amplifiers by bend-loss-induced mode filtering to produce >1 MW peak power and >1 mJ pulse energy with a practical system architecture; (2) demonstration of a widely tunable repetition rate (7.1-27 kHz) while maintaining constant pulse duration and pulse energy, linear output polarization, diffraction-limited beam quality, and <1% pulse-energy fluctuations; (3) development of microlaser seed sources optimized for efficient energy extraction; (4) high-fidelity, three-dimensional, time-dependent modeling of fiber amplifiers, including nonlinear processes; (5) quantitative assessment of the limiting effects of four-wave mixing and self-focusing on fiber-amplifier performance; (6) nonlinear frequency conversion to efficiently generate mid-infrared through deep-ultraviolet radiation; (7) direct diode-bar pumping of a fiber laser using embedded-mirror side pumping, which provides 2.0x higher efficiency and much more compact packaging than traditional approaches employing formatted, fiber-coupled diode bars; and (8) fundamental studies of materials properties, including optical damage, photodarkening, and gamma-radiation-induced darkening.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dahv A. V. Kliner, Ray P. Bambha, Binh T. Do, Roger L. Farrow, Jean-Philippe Fève, Brian P. Fox, G. Ronald Hadley, Andrea Hansen, Hanna J. Hoffman, Mircea Hotoleanu, Alexandra A. Hoops, Wen L. Hsu, Jeffrey P. Koplow, Joona Koponen, Sean W. Moore, Randal L. Schmitt, Paul E. Schrader, Joseph H. Simmons, Kelly Simmons-Potter, Arlee V. Smith, Mikko Söderlund, W. Joseph Thomes, Georg Wien, "Overview of Sandia's fiber laser program", Proc. SPIE 6952, Laser Source Technology for Defense and Security IV, 695202 (14 April 2008); doi: 10.1117/12.782227; https://doi.org/10.1117/12.782227
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