CAJ | 학술논문

设计了一种离轴双反馈外腔能够有效地改善激光二极管阵列的线宽和光束质量.闪耀光栅和高反镜之间形成了一个共振腔.通过调整光栅和高反镜之间的倾角可以选定一个空间模在共振腔中放大.将一个半波片插入外腔中的光栅反馈支路,来控制反馈光的数量,激光从光栅反馈支路输出.运用这项技术,在工作电流16 A,可以把激光二极管阵列的输出线宽压缩到0.15 nm,光束束宽积减小到283 mm·mrad.由于光栅的锁定作用,中心波长几乎不随温度的变化而改变.在工作电流17 A时,输出激光的功率为2.44 W,斜率效率为0.5 W/A.
설계료일충리축쌍반궤외강능구유효지개선격광이겁관진렬적선관화광속질량.섬요광책화고반경지간형성료일개공진강.통과조정광책화고반경지간적경각가이선정일개공간모재공진강중방대.장일개반파편삽입외강중적광책반궤지로,래공제반궤광적수량,격광종광책반궤지로수출.운용저항기술,재공작전류16 A,가이파격광이겁관진렬적수출선관압축도0.15 nm,광속속관적감소도283 mm·mrad.유우광책적쇄정작용,중심파장궤호불수온도적변화이개변.재공작전류17 A시,수출격광적공솔위2.44 W,사솔효솔위0.5 W/A.
An off-axis external cavity with double feedback is designed to simultaneously reduce spectral bandwidth and improve the beam quality of the laser diode bar.The external cavity is made up of a high-reflection mirror and a blazed grating,where the selected spatial mode can be amplified.The grating can also provide a spectral-sensitive feedback to the laser diode bar.In addition,a half-wave plate is inserted into the grating-feedback branch to control the feedback light amount,and the output laser is taken from the grating-feedback branch.The bandwidth and the beam parameter product are external cavity at a drive current of 16 A.The center wavelength is almost unchanged as the temperature varies,the laser output power is about 2.44 W at the driver current of 17 A and the slope efficiency is about 0.5 W/A.