Author: Musumeci, P.
Paper Title Page
WEPME063 Progress Report on Development of a 5-μm Drive Laser for Dielectric Laser Acceleration 3079
  • G. Xu, I. Jovanovic, S.F. Wandel
    Penn State University, University Park, Pennsylvania, USA
  • E.R. Arab
    PBPL, Los Angeles, USA
  • P.D. Hoang, P. Musumeci, B.D. O'Shea, J.B. Rosenzweig
    UCLA, Los Angeles, California, USA
  • A.Y. Murokh, A.G. Ovodenko
    RadiaBeam, Santa Monica, USA
  • I. Pogorelsky
    BNL, Upton, Long Island, New York, USA
  Funding: This work has been sponsored by Defense Advanced Research Project Agency.
A simple and robust ultrafast, high-peak-power 5-μm laser source for pumping a dielectric photonic structure for high-gradient electron acceleration has been designed and is being constructed. The use of long wavelength drive lasers can mitigate the problem of dielectric structure breakdown caused by multiphoton ionization. In addition, structure fabrication requirements are relaxed, and greater energy can be stored in the structure. The 5-μm laser source consists of two components: (1) a type-II-beta-barium borate-based 2-μm optical parametric amplifier (OPA) as a pump source, and (2) a type-I-zinc-germaniu-phosphate-based 5-μm OPA to produce mJ-class, <100 fs pulses. Our supercontinuum seeded two-stage 2-μm OPA is pumped by a Ti:sapphire amplifier and produces pulse energy of ~1.4 mJ with a pulse duration of 42 fs (~6 optical cycles). Carrier-envelope phase (CEP) stabilization is passively established for 2 μm pulses in our OPA design. An modified design of seed pulse generation for the 5-μm OPA based on several cascaded parametric processes can also result in CEP-stable operation for 5-μm amplified pulses.