Reflective type broadband Erbium Doped Fiber Amplifier with C/L coupler

• Main Authors: Yen-Hsun Chen, 陳彥勳
• Other Authors: Jeng-Cherng Dung
• Format: Others
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/41866594579395073223

碩士 === 國立東華大學 === 電機工程學系 === 101 === In this paper, we constructed a new EDFA structure to obtain a goal of broadband and gain flatted. First, we measured the characteristic of gain in different length EDFs. Basically, longer EDF could amplify the signals of longer center wavelength. Otherwise, shorter EDF could amplify the signals of shorter center wavelength. We proposed a EDFA structure with BBFBG. But in this structure, it would generate a lasing by BBFBG and FRM because their operating wavelength was overlapping, and the gain could be decrease by it. So we would change the structure to obtain the high gain and low noise figure. And we proposed and demonstrated a novel erbium-doped fiber amplifier structure with C/L coupler for broadband and flat gain in this paper. In this structure, we could avoid to produce lasing from FRM and BBFBG. In this optimal pumping configuration, the peak gain 16.21dB and 3dB gain bandwidth is 65nm(1527nm to 1592nm) when input signal power of 0dBm. Other, we added a 1567.8nm FBG, circulator2 and a 90/10 coupler to produce a cavity, and adjusted appropriate pump power. We can extend a clamping EDFA structure and it can clamp C- and L-band gain at 15 and 17dB when input signal power was -8dBm.