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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 4, Iss. 11 — Nov. 10, 2006
  • pp: 636–638

Low noise gain-clamped L-band erbium-doped fiber amplifier by utilizing fiber Bragg grating

Tianshu Wang, Yubin Guo, Hongwei Yan, Yuhang Wang, and Ke Wang  »View Author Affiliations


Chinese Optics Letters, Vol. 4, Issue 11, pp. 636-638 (2006)


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Abstract

A novel gain-clamped long wavelength band (L-band) erbium-doped fiber amplifier (EDFA) is proposed and experimented by using a fiber Bragg grating (FBG) at the input end of the amplifier. This design provides a good gain clamping and decreases noise effectively. It uses two sections of erbium-doped fiber (EDF) pumped by a 1480-nm laser diode (LD) for higher efficiency and lower noise figure (NF). The gain is clamped at 23 dB with a variation of 0.5 dB from input signal power of -30 to -8 dBm for 1589 nm and NF below 5 dB is obtained. At the longer wavelength in L-band higher gain is also obtained and the gain is clamped at 16 dB for 1614 nm effectively. Because the FBG injects a portion of backward amplified spontaneous emission (ASE) back into the system, the gain enhances 5 dB with inputting small signal.

© 2006 Chinese Optics Letters

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(060.2410) Fiber optics and optical communications : Fibers, erbium
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(140.3560) Lasers and laser optics : Lasers, ring

Citation
Tianshu Wang, Yubin Guo, Hongwei Yan, Yuhang Wang, and Ke Wang, "Low noise gain-clamped L-band erbium-doped fiber amplifier by utilizing fiber Bragg grating," Chin. Opt. Lett. 4, 636-638 (2006)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-4-11-636


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