Product Code: ICA12_904

102 W All-Fiber Broadband Superfluorescent Source Based on Ytterbium-Doped Double-Cladding Fibers
Authors:
Yi Cao, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Jiang Liu, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Ke Wang, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Pu Wang, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2012

Fiber lasers have numerous advantages over traditional solid state laser and CO2 laser, such as excellent beam quality, flexible fiber delivery, high efficiency and reliability. In particular, all-fiber high-power fiber lasers are widely used in the field of optical communication, laser medical treatment and laser material processing. As a new type of fiber lasers, high-power superfluorescent fiber source (SFS) has incited great research interest for its large single-pass gain and stable high-power operation in compact and efficient devices. In this paper, we describe such an all-fiber high-power SFS achieved via a two-stage configuration based on ytterbium-doped double-cladding fibers. First, a 200mW amplified spontaneous emission (ASE) seed source is set up. The center wavelength of the ASE seed source is 1050nm, and the bandwidth(FWHM) is 21nm. Due to its broadband spectrum and high stability, the ASE seed source gets high gain of more than 26dB in the next fiber amplifier, with no self-pulsing, relaxation oscillation or lasing modes being observed. The maximum superfluorescent output power yielded by the amplifier is 102W, and the bandwidth (FWHM) of the emission spectrum is 20.5nm. Higher power is attainable by way of cascaded fiber amplifiers. Various applications of high-power SFSs are to be explored.