CAJ | 학술논문

为了研究基于光栅-外腔的二极管激光阵列光谱合束,利用存在离轴像差情况下耦合效率模型,数值模拟了系统各参量对耦合效率的影响,可知耦合效率随着离轴距离和横模阶次增加而下降:单个单元将被压窄至0.05nm.应用光栅-外腔实现了单条二极管激光阵列光谱合束,获得了10.1W的连续输出,斜效率为0.45W/A,慢轴方向光束质量因子Mx2=17.6,整个阵列的光谱被展宽到15nm,单个单元的线宽被压窄到0.1nm.结果表明,光谱合束能改善二极管激光阵列的光束质量,压窄单个单元的线宽.
위료연구기우광책-외강적이겁관격광진렬광보합속,이용존재리축상차정황하우합효솔모형,수치모의료계통각삼량대우합효솔적영향,가지우합효솔수착리축거리화횡모계차증가이하강:단개단원장피압착지0.05nm.응용광책-외강실현료단조이겁관격광진렬광보합속,획득료10.1W적련속수출,사효솔위0.45W/A,만축방향광속질량인자Mx2=17.6,정개진렬적광보피전관도15nm,단개단원적선관피압착도0.1nm.결과표명,광보합속능개선이겁관격광진렬적광속질량,압착단개단원적선관.
In order to study spectral beam combining of a laser diode array (LDA) based on grating-cavity,coupling efficiency model with abaxial aberration was adopted to analyze the effect of the system parameters on the coupling efficiency.The coupling efficiency decreased when abaxial distance or the order of mode increased,and the linewidth of emitters could be compressed to 0.05nm.A LDA comprised of 19 emitters was spectrally combined by means of grating-cavity with 10.1W CW output power,0.45W/A slope efficiency and beam quality factor Mx2 of 17.6 along the slow axis.Spectrum width of the LDA was broaden to 15nm,and linewidth of a single emitter was compressed to 0.lnm.It is shown that spectral beam combining can improve beam quality of a LDA and narrow linewidth of emitters.