抽运源温度控制的功率均衡双波长激光器

Power-balanced tunable dual-wavelength laser with pump source temperature control

通过建立激光二极管(Laser Diode,LD)抽运的Nd:GdVO_(4)/Nd:YVO_(4)双增益介质共腔型双波长激光器的数学模型,研究不同抽运光束腰位置条件下LD抽运源工作温度对双波长信号输出功率比的影响。数值研究结果表明,在抽运功率为3.7 W,抽运光束腰位置分别为5.7 mm和5.8 mm的条件下,LD抽运源工作温度从18.0℃上升至29.0℃时,双波长信号输出功率比分别从0.42升至1.39,0.31升至1.08;并在抽运源工作温度为25.6℃和28.2℃时实现了功率均衡。进一步搭建实验装置,测量不同抽运光束腰位置条件下、不同LD抽运源工作温度的双波长信号输出功率比,在抽运功率为3.7 W,抽运光束腰位置分别为5.75 mm和6.00 mm的条件下,当LD抽运源工作温度从18.0℃上升至30.0℃时,双波长信号输出功率比分别从0.39上升至1.64,0.31升至1.10,激光器功率均衡时的LD抽运源工作温度分别为24.3℃和28.6℃。实验结果与数值研究结果符合较好。

The mathematical model of the LD-pumping Nd:GdVO_(4)/Nd:YVO_(4) dual-gain medium common-cavity dual-wavelength laser is established,and the influence of the operating temperature of the LD pump source on the output power ratio of the dual-wavelength signal under different pump beam waist positions was investigated.The results show that when the pump power is 3.7 W,the pump beam waist positions are 5.7 mm and 5.8 mm,and when the operating temperature of the LD pump source increases from 18.0℃ to 29.0℃,the ratios of the dual-wavelength signal output power increase from 0.42 to 1.39,and from 0.31 to 1.08,respectively;and the power balance was achieved when the operating temperatures of the pump source are 25.6℃ and 28.2℃.A corresponding experimental device is established to measure the power ratio of the dual-wavelength output under different pump beam waist positions and different LD pump source operating temperatures.It is found that when the pump power is 3.7 W,the pump beam waist positions are 5.75 mm and 6.00 mm,and when the operating temperature of the LD pump source increases from 18℃ to 30.0℃,the ratios of the dual-wavelength signal output power increase from 0.39 to 1.64,and from 0.31 to 1.10,respectively.The operating temperatures of the power-balanced LD pump source are 24.3℃ and 28.6℃,respectively.The experimental results are in good agreement with the simulation results.