title: High-power, narrow-band, high-repetition-rate, 5.9 eV coherent light source using passive optical cavity for laser-based angle-resolved photoelectron spectroscopy.
abstract: We demonstrate a scheme for efficient generation of a 5.9 eV coherent light source with an average power of 23 mW, 0.34 meV linewidth, and 73 MHz repetition rate from a Ti: sapphire picosecond mode-locked laser with an output power of 1 W. Second-harmonic light is generated in a passive optical cavity by a BiB(3)O(6) crystal with a conversion efficiency as high as 67%. By focusing the second-harmonic light transmitted from the cavity into a β-BaB(2)O(4) crystal, we obtain fourth-harmonic light at 5.9 eV. This light source offers stable operation for at least a week. We discuss the suitability of the laser light source for high-resolution angle-resolved photoelectron spectroscopy by comparing it with other sources (synchrotron radiation facilities and gas discharge lamp).
authors.affiliation: Photon Science Center, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Omachi
authors.forename: K
authors.initials: K
authors.lastname: Yoshioka
authors.forename: M
authors.initials: M
authors.lastname: Kuwata-Gonokami
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008029:Lighting / Q000295:instrumentation*; D056951:Photoelectron Spectroscopy / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*