title: Solar-pumped 80 W laser irradiated by a Fresnel lens.
abstract: A solar-pumped 100 W class laser that features high efficiency and low cost owing to the use of a Fresnel lens and a chromium codoped neodymium YAG ceramic laser medium was developed. A laser output of about 80 W was achieved with combination of a 4 m(2) Fresnel lens and a pumping cavity as a secondary power concentrator. This output corresponds to 4.3% of conversion efficiency from solar power into laser, and the maximum output from a unit area of Fresnel lens was 20 W/m(2), which is 2.8 times larger than previous results with mirror-type concentrator.
authors.affiliation: Department of Mechanical Sciences and Engineering, Tokyo Institute of Technology, Tokyo, Japan. tohkubo@mech.titech.ac.jp
authors.forename: Tomomasa
authors.initials: T
authors.lastname: Ohkubo
authors.forename: Takashi
authors.initials: T
authors.lastname: Yabe
authors.forename: Kunio
authors.initials: K
authors.lastname: Yoshida
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Uchida
authors.forename: Takayuki
authors.initials: T
authors.lastname: Funatsu
authors.forename: Behgol
authors.initials: B
authors.lastname: Bagheri
authors.forename: Takehiro
authors.initials: T
authors.lastname: Oishi
authors.forename: Kazuya
authors.initials: K
authors.lastname: Daito
authors.forename: Manabu
authors.initials: M
authors.lastname: Ishioka
authors.forename: Yuichirou
authors.initials: Y
authors.lastname: Nakayama
authors.forename: Norihito
authors.initials: N
authors.lastname: Yasunaga
authors.forename: Kouichirou
authors.initials: K
authors.lastname: Kido
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sato
authors.forename: Choijil
authors.initials: C
authors.lastname: Baasandash
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Kato
authors.forename: Takagimi
authors.initials: T
authors.lastname: Yanagitani
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Okamoto