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Manfred R Otto

William F Hug

Edwin A Reed

An ultraviolet metal vapor laser tube includes an elongated envelope, an active laser medium, an output coupling mirror assembly which is disposed on one end of the elongated envelope and a reflector mirror assembly which is disposed on the other end thereof. The active laser medium consists of helium gas and cadmium vapor and is contained in the elongated envelope. A partially reflecting multilayer dielectric coating is formed on the inner surface of a glass substrate to form the output coupling mirror assembly. The glass substrate has a thickness in the range of 3.0 to 10.0 millimeters and transmits at least 85% of light energy at a wavelength of 325 nanometers. A reflecting multilayer dielectric coating is formed on the inner surface of a glass substrate and is substantially reflective of light energy at a wavelength of 325 nanometers to form the reflector mirror assembly. A first metal flange member has an aperture formed therein and mounts the output coupling mirror assembly at one end of the elongated envelope. The second metal flange member has a second metal member which has an aperture formed therein and mounts the reflector mirror at the other end of the elongated envelope. A glass solder bonds the output coupling and reflector mirror assemblies to the first and second metal flange members, respectively, all of which have coefficients of thermal expansion which are substantially equal.

Ultraviolet metal vapor laser having hard sealed internal mirrors

A metal vapor laser discharge tube configuration for preventing accumulation of the condensed metal form interfering with the generated laser beam. A heater arrangement is positioned on the tube in an area corresponding to the area in which the metal vapor condenses within the tube. Energization of the heater when required melts the condensate thus extending the laser tube lifetime.

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Pomona, CA, United States of America

Manfred R Otto