作　　者： ; ; ; ; ; ; ;

机构地区： 北京工业大学

出　　处： 《光电子．激光》 2009年第1期16-20,共5页

摘　　要： 基于波长光束组合(WBC)技术,利用光栅衍射和外腔反馈,将二极管激光阵列(LDA)发光单元锁定在不同的波长上,以近似平行光束沿光栅的-1级衍射方向组合输出,改善LDA输出光束质量。实验中采用发光单元宽度为100μm、周期为500μm及由19个单元构成的1cm普通商用LDA,在连续运行最大注入电流为60.6A、自由运转输出功率为49.8W时,获得功率为20.1W的组合光束稳定输出,其光谱宽度为15nm,对应的远场发散角由约70mrad变为1.66mrad,改善后的光束质量因子M2x,y约为32,与单个发光单元的光束质量相当。 Based on the wavelength beam combining technology,we use the diffraction of the grating and the feedback of the external cavity to lock all elements of a laser diode array(LDA)on different wavelengths.The beam quality of LDA is improved and a near parallel output is produced in the direction of-1 order diffraction of grating.A commercial available LDA with 19 emitters is apllied,whose size is about 1 cm.The period of the LDA is 500 μm and the width of emitters is 100 μm.With a maximum continuous injection current of 60.6 A,the output free running power is 49.8 W,and a steady beam combined output power of 20.1 W is obtained.The width of spectrum is 15 nm.And the far-field divergence angle is reduced from 70 mrad to 1.66 mrad.The improved bem quality M2x,y is about 32,which is almost equal to that of a single emitter.

关 键 词： 二极管激光阵列 光谱光束组合 波长光束组合 衍射光栅

领　　域： [电子电信]