Gain Clamping Characteristic of C+L Broadband Erbium Doped Fiber Amplifier
| Autor: | Po-Yu Tsai, 蔡博宇 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 This paper was titled “Gain Clamping Characteristic of C+L Broadband Erbium Doped Fiber Amplifier.” In this study, we first measured the gain with C+L broadband completed. The experimental setup used 5.5m erbium doped fiber (EDF) by using C/L coupler to divide C-band one - pass and L-band double - pass. Thus, we could improve the gain for L-band amplification. The pump wavelength and pump power are 980nm and 200mw respectively. To reach gain clamping, when the C+L broadband EDFA completion was needed. We used Amplified Spontaneous Emission (ASE) to create by the C+L broadband EDFA feedback into the ring cavity. It could produce the clamping laser to reach gain clamping. In the ring cavity, we observe gain clamping variation in different devices to try more structures, single and multi-input signals, input power, fiber Bragg grating(FBG), pumping wavelength, and gain medium to find the best clamp structure. This experiment proofed that the gain could be clamped with equalization by using ring cavity structure. Therefore, this experiment result showed that the gain clamping range from -5~-25dBm could be reached and the gain peak at the wavelength 1575nm was 19.51dB. Also, the noise figure was 6.14dB. So, we chose 3m EDF, 1480nm 200mW and 1540.355nm for the gain medium, pump parameters and FBG respectively. We proposed amplifier could offer significant implications as stated above, which can improved C+L broadband amplification and clamping result. The gain and clamping wavelength range was added, it was be increased the transmission capacity and can choose wider range for input power in the use of WDM transmission system is more convenient. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|