High Resolution Free-Electron Laser Spectroscopy, (Final Technical Report, June1, 1988-September 30, 1991)

摘要

High peak power infrared pulses as short as 350 femtoseconds have been generatedusing the MK III FEL. Small signal analyses have been developed for operating the FEL with electron pulses whose energy varies linearly with time. Chirped-pulse simulations using modest energy shirps have demonstrated a xl5 compression ratio at saturated power levels for 3.4 ps optical pulses at 3.35 micrometers, and coupled pulse simulations have indicated substantial longitudinal mode reduction on microsecond time scales. A Michelson mirror resonator has been operated for the first time on the MK III FEL, along with phase-locked operation using a beamsplitter reflectance of only 1.4%.... Free electron laser, Femtosecond pulses, Spectroscopy, Chirped pulses.