| 摘要 |
PURPOSE:To increase energy efficiency and prevent the deterioration of laser medium, by a method wherein, after the outputted light of a pumping light source is converted into pumping light wavelength wherein the laser medium effectively perform laser transition, the laser medium is irradiated with said light. CONSTITUTION:Quartz glass doped with chromium absorbs the light whose wavelength is 400-600nm, and emits the light in the wavelength range of 600-850nm. That is, the spectral distribution of xenon lamp light which has passed the quartz glass doped with chromium loses the light whose wavelength is shorter than 600nm, and the luminance in the wave length region of 600-850nm is doubled. The light subjected to wave length conversion in the above manner is projected on an Nd:YAG rod by using a condenser reflecting mirror, and laser light is led out by using a resonator, thus almost doubling the laser output intensity as compared with the conventional case. In the case where the operating energy of a xenon flash lamp is reduced to one-half while the laser output intensity is kept equal, the life of the xenon lamp is increased nearly ten times. |
