title: Cr(4+):YAG double-clad crystal fiber laser.
abstract: We report what we believe to be the first demonstration of a room-temperature, continuous-wave Cr(4+):Y(3)Al(5)O(12) (Cr(4+):YAG) double-clad crystal fiber laser grown by the codrawing laser heated pedestal growth method. The threshold is below 100 mW, which is a factor of 4 lower than previously reported Cr(4+)-doped lasers. A slope efficiency of 6.9% was obtained, and is in good agreement with the numerical simulation. In additional to small core diameter, the low-threshold lasing is made possible by the low propagation loss of 0.08 dB/cm and the high crystallinity of the core.
authors.affiliation: Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan.
authors.forename: Chien-Chih
authors.initials: CC
authors.lastname: Lai
authors.forename: Hann-Jong
authors.initials: HJ
authors.lastname: Tsai
authors.forename: Kuang-Yao
authors.initials: KY
authors.lastname: Huang
authors.forename: Kuang-Yu
authors.initials: KY
authors.lastname: Hsu
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Lin
authors.forename: Kuan-Dong
authors.initials: KD
authors.lastname: Ji
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Zhuo
authors.forename: Sheng-Lung
authors.initials: SL
authors.lastname: Huang