用低功率可见二极管激光器进行倍频实验  

Experiment of frequency doubling with low power visible diode laser

作　　者：娄秀涛[1] 徐连杰[1] 赵海发[1] LOU Xiutao;XU Lianjie;ZHAO Haifa(National ExperimentalTeaching Demonstration Center for Applied Physics Major,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学应用物理专业国家级实验教学示范中心,黑龙江哈尔滨150001

出　　处：《实验技术与管理》2019年第2期127-129,共3页Experimental Technology and Management

基　　金：国家自然科学基金项目(61775049);黑龙江省高等学校教改工程项目(JG2014010690)

摘　　要：针对用高功率近红外固体激光器进行激光倍频实验存在光路调节难度大、安全防护要求高的问题,提出一种基于低功率连续可见二极管激光的倍频实验方案。使用功率小于50mW、中心波长506nm的二极管激光作为基频光,利用偏硼酸钡晶体生成了nW级光功率的倍频紫外激光,并由高效光电倍增管探测。实验结果显示倍频光功率与基频光功率为二次函数关系,倍频效率与基频光功率为一次函数关系,实验结果与理论值高度吻合。该实验方案具有光路校准难度小和安全防护要求低的优点。In view of the difficulty of adjusting the optical path and the high requirement of safety and protection in the laser frequency doubling experiment of high power near infrared solid state laser, a scheme of the frequency doubling experiment based on the low power continuous visible diode laser is proposed. By using a diode laser with a power of less than 50 mW and a central wavelength of 506 nm as the fundamental frequency light, a frequency-doubled ultraviolet laser with a power of nW is generated by BBO crystal, and is detected by an efficient photomultiplier tube. The experimental results show that the power of doubled frequency light is the quadratic function with the power of fundamental frequency light, and the efficiency of doubled frequency light is the quadratic function with the power of fundamental frequency light. The experimental results are in good agreement with the theoretical results. The proposed experimental scheme has the advantages of less difficulty in optical calibration and lower requirements for safety protection.

关 键 词：二极管激光 倍频实验 实验教学 

分 类 号：TN248.4[电子电信—物理电子学] G642[文化科学—高等教育学]