A practical two-stage double-pass structure using high concentration erbium-doped fiber and 1480-nm pump laser diode is suggested for a high power and broad bandwidth erbium-doped superfluorcscent fiber source. A considerable increase in output power and bandwidth extension is achieved by adding an unpumped fiber and a broadband fiber mirror to make the most of wasted backward amplified spontaneous emission as both pump and input light source simultaneously. Superfluorcscent fiber source with nearly 80-nm bandwidth and 28.6-mW output power is obtained experimentally.
© 2005 Chinese Optics Letters
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(060.2410) Fiber optics and optical communications : Fibers, erbium
Wencai Huang, Hai Ming, Jianping Xie, Xiyao Chen, Anting Wang, and Liang Lu, "High efficiency broad bandwidth erbium-doped superfluorescent fiber source," Chin. Opt. Lett. 1, 311-313 (2003)