| 摘要 |
PURPOSE:To eliminate the decrease in gain due to temperature rise by constructing the titled device in such a manner that the medium gas being introduced-in is always passed through a laser light path folding back and forth between introduced concave mirrors without being confined in the container. CONSTITUTION:An exhaust pipe 14 is connected at the top of the container 10 with the arrangement of a pair of concave-spherical reflection mirrors 11a and 11b. On the other hand, in order to keep the inner temperature of the container 10, an outer container 16 surrounding the whole container 10 by providing the space 15 is provided. The outer container 16 is installed to a supply pipe 12 and the exhaust pipe 14 and encloses the inner container 10. Besides, a supply pipe 17 and an exhaust pipe 18 to supply the space 15 with a cooling gas coming to a lower temperature of the same degree as para-hydrogen, and further to exhaust it are connected to the upper and lower parts, respectively. Continuous passing of the coolant gas without confinement by such a construction enables rapid elimination of the heat evolving with Raman conversion; therefore, the decrease in gain due to temperature rise does not occur, and Raman oscillation can be accomplished with good efficiency. |
