High-inversion laser device having an impregnated flashtube jacket, an ultraviolet absorbing filter between the laser rod and the flashtube and a filter within the laser rod

Claim 1

A high-inversion level laser apparatus comprising in combination: a. a laser rod capable of producing a coherent beam of electromagnetic radiation in a first wavelength, said laser rod having a hollow portion therein dividing said rod into segments; b. pumping means optically coupled to said laser rod for producing a high intensity of optical radiation in a second wavelength; c. first filter means adapted to absorb radiation in said first wavelength, said first filter means being substantially transparent to said second wavelength; d. said first filter means having at least one said filter medium shaped to match said hollow portion of said laser rod and located within said laser rod, dividing said laser rod into sections whereby transverse emissions are absorbed within said laser rod between said sections; e. a second filter means located between said pumping means and said laser rod and including an ultraviolet filter located between said pumping means and said laser rod; and f. said pumping means having a flashlamp, said flashlamp having a quartz jacket impregnated with a material for filtering out said first wavelength while transmitting said second wavelength whereby a high-inversion level laser is provided.