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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 1, Iss. 9 — Sep. 20, 2003
  • pp: 532–534

Double-pass ytterbium-doped fiber amplifier with high gain coefficient and low noise figure

Anting Wang, Meishu Xing, Guanghui Chen, Wenkui Yang, Hai Ming, Jianping Xie, and Yunxia Wu  »View Author Affiliations

Chinese Optics Letters, Vol. 1, Issue 9, pp. 532-534 (2003)

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We have proposed and demonstrated a double-pass ytterbium-doped fiber amplifier using an optical circulator and a fiber Bragg grating as reflector. When the signal has passed through the ytterbium-doped fiber once, it reflects off a 0.2-nm passive fiber Bragg grating filter. This reduces amplified spontaneous emission (ASE) noise from the first pass. The input signal light is amplified both forward and backward through ytterbium-doped fiber. With this double-pass configuration, 1053.15-nm unsaturated signal gain of 28 dB, gain coefficient of 1.1 dB/mW, and noise figure of less than 4 dB are achieved at 977-nm pump power of 68 mW. It is also found that this double-pass configure provides enhancing gain coefficient and improving noise figure by comparison with single-pass configuration.

© 2005 Chinese Optics Letters

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.4480) Lasers and laser optics : Optical amplifiers

Anting Wang, Meishu Xing, Guanghui Chen, Wenkui Yang, Hai Ming, Jianping Xie, and Yunxia Wu, "Double-pass ytterbium-doped fiber amplifier with high gain coefficient and low noise figure," Chin. Opt. Lett. 1, 532-534 (2003)

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