摘要
介绍了一种LD泵浦Nd:YVO_4和Nd:YAG的单纵模589 nm激光器。1 064 nm与1 319 nm的基频光通过"L"型复合谐振腔获得同时振荡,通过Ⅱ类相位匹配切割的KTP晶体腔内和频以及由布鲁斯特片和KTP组成的双折射滤波器的选频,获得了单纵模589 nm连续激光器。利用琼斯矩阵方法分析了两个基频光的S偏振和P偏振光通过双折射滤波器时的损耗。结果表明:1 064 nm和1 319 nm次纵模的损耗分别比峰值透射率纵模的损耗大0.5%和2%以上。以此为基础,在实验上实现了一种单纵模589 nm激光器,其最大输出功率为58 mW,功率稳定性优于0.36%,线宽约为30 MHz。双折射滤波器方法对双波长振荡及和频激光器实现单纵模输出是一种有效的方法。
A laser-diode pumped Nd:YVO4 and Nd:YAG single-longitudinal-mode 589 nm laser is presented.The fundamental waves of 1064 nm and 1319 nm simultaneously oscillate through an L type composite resonator.Through intracavity sum-frequency-generation in a KTP crystal(cut at type II phase matching),the single longitudinal mode 589 nm continuous wave is obtained by a birefringent filter which is consisted of a Brewster plate and the KTP crystal.The losses of S-and P-elements of the two fundamental waves are calculated by Jones matrix method.The losses of the first sub-longitudinal modes for 1064 nm and 1319 nm are 0.5%more and 2%more than their peak transmission modes respectively.Based on the above mentioned,a single-longitudinal-mode 589 nm laser is realized in experiment.The maximum output power is 58 mW,the amplitude fluctuation is less than 0.36%,and the line width is about 30 MHz.The results show that the birefringent filter technology is effective for single-longitudinalmode double-wavelength oscillation and sum-frequency-generation lasers.
作者
杨飞
李萌萌
高兰兰
YANG Fei;LI Mengmeng;GAO Lanlan(College of Science,Changchun University of Science and Technology,Changchun 130022,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2021年第5期95-101,共7页
Acta Photonica Sinica
基金
Jilin Province Department of Education“13th five-year”Science and Technology Research Planning Project(No.JJKH20190552KJ)。
关键词
激光
和频
双折射滤波器
单纵模
连续波
复合腔
Laser
Sum-frequency-generation
Birefringent filter
Single-longitudinal-mode
Continuous wave
Composite resonator
