title: Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber.
abstract: An all-solid Yb(3+)/Er(3+) co-doped single-mode phosphate photonic crystal fiber (PCF) with Watt-level output power and 20 μm core diameter is demonstrated for the first time. A PCF whose refractivity of the active core is lower than that of the background glass is suggested and theoretically confirmed to be in single-mode operation at 40 μm core diameter.
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Longfei
authors.initials: L
authors.lastname: Wang
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Dongbing
authors.initials: D
authors.lastname: He
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Suya
authors.initials: S
authors.lastname: Feng
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Chunlei
authors.initials: C
authors.lastname: Yu
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Hu
authors.affiliation: Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
authors.affiliation: 1] Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Danping
authors.initials: D
authors.lastname: Chen