Solid Optical Reference Cavity And Study Of Frequency Stabilization System Based On Single-mode He-Ne Laser

This paper aims to develop a compact and practical frequency stabilized laser system which can get applications where frequency stability is not demanding. At the same time, this laser system could satisfy the requirements of general test as an optical reference standard in spectroscopy.This paper will first introduce the basic principle of Pound-Derever-Hall (PDH) frequency stabilization technology and then analyze the influence of amplitude noise and residual amplitude modulation (RAM) on PDH technology. Besides, solid quartz F-P reference cavity was reasonably designed with fine temperature control for its temperature drift is under0.8mK in an hour without vacuum chamber. In the experiment, two frequency stabilized single-mode He-Ne laser systems based on solid quartz cavity were established using PDH technology. Those two systems are well operated after having overcome the influence of amplitude noise, RAM and quartz birefringence effect on optical heterodyne phase modulation spectrum. In order to evaluate the property of laser systems, we carried out a comparison between two of them and the linewidth of each locked laser is about89.11kHz, and its frequency stability reaches2.33×10-11within one second average time. The servo tacking precision of the first system is about300Hz, the other is around370Hz.In the end of this article, we summarize the whole work and appraise locking time, linewidth and frequency stability of laser systems. Meanwhile, the application scope which those systems adapt to is given.