Title :
Spikes in Raman spectrum of optically pumped NH3 laser
Author :
Jiayin, Qin ; Xingshi, Zhwg ; Luo Xizhang ; Cong, Li ; Yikun, Lin
Author_Institution :
Submillimeter Wave Laser Lab., Zhongshan Univ., Guangzhou, China
Abstract :
Raman processes interaction (RPI) takes in the transition V2:a→sR(O,O) pumped by C02-10R(6). In the case of higher operating NH3 gas pressure or lower pumping power density, the AC-Stark spectrum overlapped; that led to intense RPI, and the spikes in the spectrum appeared. The appearance of the spikes looks like an oscillation effect; in fact, it would be a kind of fine-structure of AC-Stark spectrum in a special case of RPI. The spikes looked like a flag of RPI, the more the spikes appeared, the stronger the RPI would be. We did not find the spikes in other transitions, except the a→sR(O,O) transition. This means that the spike effect not only is a function of the laser operating parameters, such as the pumping power and operating gas pressure. but also a function related to a complicated physical process, which relates to the molecular energy levels and the transition dipole moment
Keywords :
Raman lasers; Stark effect; ammonia; fine structure; gas lasers; laser transitions; optical pumping; submillimetre wave lasers; AC-Stark spectrum; NH3; Raman processes interaction; Raman spectrum; fine-structure; gas pressure; molecular energy levels; optically pumped laser; pumping power density; spike effect; transition dipole moment; Economic indicators; Energy states; Gas lasers; Laser excitation; Laser theory; Laser transitions; Optical pumping; Power lasers; Pump lasers; Stimulated emission;
Conference_Titel :
Millimeter Wave and Far Infrared Science and Technology, 1996. Proceedings., 4TH International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-3619-4
DOI :
10.1109/ICMWFT.1996.574864
