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High-power Er3+/Yb3+ Co-doped Fiber Amplifier Study

Posted on:2015-02-13Degree:MasterType:Thesis
Country:ChinaCandidate:X Y LiFull Text:PDF
GTID:2268330425989042Subject:Communication and Information System
Abstract/Summary:PDF Full Text Request
In recent years, the rapid development of optical fiber communication, fiber amplifier performance put forward higher requirements. With the optical fiber communication technology increasing the amplifier power demand, Erbium/ytterbium co-doped double-clad fiber amplifier with its optical communication wavelength1550nm high saturated output power characteristics, more and more attention by people. This article is based on erbium/ytterbium co-doped fiber characteristics, double-clad fiber structural characteristics, using cladding-pumped coupling technology, from the theoretical and experimental aspects studying high power fiber amplifiers. The main work is as follows:First of all, analysis of the erbium/ytterbium co-doped fiber Yb3+ions doped role, and double-clad fiber structure affect cladding pump absorption efficiency, analysis of the erbium/ytterbium co-doped level system level transition and rate equations and power transmission equations. According to Runge-Kutta law analysis the relationship of the double-clad fiber amplifier output signal power, gain with the fiber length, pump power and the input signal power.Secondly, based on optical design software OptiSystem, simulating and optimizing Erbium/ytterbium co-doped fiber amplifier parameters, studying different pumping light, signal light input corresponding amplifier characteristics. Analyzing the length of active fiber cladding size, rare earth ion doping concentration and other parameters affect the amplifier output performance. By building forward, backward, bi-directional pumping mode simulation model, studied erbium/ytterbium co-doped fiber amplifier gain spectrum and noise characteristics. Comparative analysis the two-level structure and the single-stage structure erbium/ytterbium co-doped fiber amplifier amplification characteristics.Finally, according erbium/ytterbium co-doped fiber amplifier parameters optimization results, build a pumped erbium-ytterbium co-doped double-clad fiber amplifier. In conditions the signal power is OdBm, EDFA saturated output power is23dBm, Er3+/Yb3+co-doped double-clad fiber length is5m, multimode pump laser output power is20.44W, obtained37.12dBm (5.15W) output power,25.19%slope efficiency. Experimental study fiber amplification system ASE spectral characteristics, and at the condition that different pumping power, different power input signal light, amplified output performance changes. And analyze different ways of pumping affect amplifier performance. Analysis experimental observed green phenomenon,1060nm wavelength fluorescence phenomenon self-excited oscillation phenomenon. And Summary the key technical fiber amplifier production...
Keywords/Search Tags:fiber amplifier, Erbium-Ytterbium co-doped, double-clad fiber, cladding pump coupling, cascade amplifying
PDF Full Text Request
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