CAJ | 학술논문

根据低重频高能脉冲多级光纤主振荡功率放大(MOPA)系统的模型,建立了多级光纤MOPA系统的速率方程和功率传递方程,并提出了一种多级光纤MOPA系统的优化方法.与传统的单个光纤放大器的优化方法相比,该方法把每一级放大器作为系统的一部分,并通过对整个系统结果的分析来优化每一级放大器的参数.对一个两级掺Yb光纤MOPA系统进行了优化模拟计算,在获得基本相同的输出脉冲能量条件下,使用多级光纤MOPA系统优化方法计算得到的第一级光纤优化长度和泵浦功率分别比用传统优化方法得到的结果短3 m和低69.1 W.基于该优化方法,第二级放大器的参数和种子光峰值功率也得到了优化.结果表明:在对多级光纤MOPA系统进行优化时,传统的单光纤放大器优化方法被系统优化方法代替,是用最低成本获得高能量转换效率的保证.
근거저중빈고능맥충다급광섬주진탕공솔방대(MOPA)계통적모형,건립료다급광섬MOPA계통적속솔방정화공솔전체방정,병제출료일충다급광섬MOPA계통적우화방법.여전통적단개광섬방대기적우화방법상비,해방법파매일급방대기작위계통적일부분,병통과대정개계통결과적분석래우화매일급방대기적삼수.대일개량급참Yb광섬MOPA계통진행료우화모의계산,재획득기본상동적수출맥충능량조건하,사용다급광섬MOPA계통우화방법계산득도적제일급광섬우화장도화빙포공솔분별비용전통우화방법득도적결과단3 m화저69.1 W.기우해우화방법,제이급방대기적삼수화충자광봉치공솔야득도료우화.결과표명:재대다급광섬MOPA계통진행우화시,전통적단광섬방대기우화방법피계통우화방법대체,시용최저성본획득고능량전환효솔적보증.
According to the model of low-repetition-frequency high-energy pulse amplification in multi-stage fiber master-oscillator-power-amplifier(MOPA)system,the rate and power transfer equations of the MOPA system were constructed,and a new optimal method for the MOPA system was proposed.Compared with the taditional optimal method for single fiber amplifier,the new method considered every amplifter as a part of the whole system and it was optimized by analyzing the whole system.As an example,a two-stage Yb-doped fiber MOPA system was optimized.Under the conditions of almost equal output energy,the optimal fiber length and pump power of the first stage calculated by the proposed method could be 3 m shorter and 69.1 W lower than those calculated by the traditional one,respectively.In addition,based on the new method,parameters of the second stage amplifier and peak power of the seed light source could also be optimized.The result shows that traditional optimal method should be replaced by the proposed method,in order to ensure to achieve a high-energy transfer efficiency at the lowest cost.