Chinese Optics Letters, 2006, 4 (11): 636, Published Online: Nov. 17, 2006
Low noise gain-clamped L-band erbium-doped fiber amplifier by utilizing fiber Bragg grating Download: 509次
掺铒光纤放大器 L波段 增益钳制 光纤Bragg光栅 噪声系数 050.2230 Fabry-Perot 060.2410 Fibers, erbium 060.2430 Fibers, single-mode 140.3560 Lasers (ring)
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.
Tianshu Wang, Yubin Guo, Hongwei Yan, Yuhang Wang, Ke Wang. Low noise gain-clamped L-band erbium-doped fiber amplifier by utilizing fiber Bragg grating[J]. Chinese Optics Letters, 2006, 4(11): 636.