Glass laser discs with annular alkali lead borate coatings and u

Details Glass laser discs with annular alkali lead borate coatings and u Glass laser discs with annular alkali lead borate coatings and u

1974-10-15

1976-10-26

Webster, Robert J.

Oscillators

Molecular or particle resonant type

331 945P, 330 43, 2523014F, 106 47Q, 350 1, H01S 317, H01S 3093

Patent

active

039886972

ABSTRACT:
A laser assembly that includes a novel glass laser disc having an annular alkali lead borate glass coating for use in the assembly is disclosed. The annular coating has an index of refraction that is about 3 to 12% greater than the index of refraction of the laser disc, the thermal properties also being sufficiently matched with the glass laser disc so as to prevent the development of undesirable strains therein, the glass coating comprising a mixture of alkali metal oxides in which at least two different alkali metal oxides are present, and any K.sub.2 O that is present is limited to an amount of not substantially more than about 1% by weight and an effective energy absorbing amount of heavy metal oxide that absorbs energy at a wavelength of about 1.06 microns to prevent parasitic oscillations. The heavy metal oxides include oxides of transition metals of the 3d, 4d, 4f, 5d and 5f orbital series.

REFERENCES:
patent: 3473144 (1969-10-01), Shiner
patent: 3626319 (1971-12-01), Young

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