Protective coating for solid state slab lasers

Details Protective coating for solid state slab lasers Protective coating for solid state slab lasers

1995-02-07

1995-12-26

Scott, Jr., Leon

Coherent light generators

Particular active media

Active media with particular shape

372 72, 372 34, 372 35, 372 36, H01S 306

Patent

active

054794307

ABSTRACT:
A protective coating [26] and a method for applying the same on an optically pumped solid state laser [10] having a lasing medium in the form of a slab [12] with at least two opposed parallel pumping faces [18, 20] between which a laser beam [11] propagates along a zig-zag path dictated by total internal reflection between these pumping faces. The slab [12] has an input face [14] for coupling in the laser beam and an output face [16] for coupling it out. The protective coating [26] is an organic synthetic, processed thermoplastic, or thermosetting polymer. Preferred materials include polymethylmethacrylate (PMMA), polyvinylidene chloride (PVC), polyethylene, polyimide, and Mylar.
The protective coating [26] is applied onto the slab [12] from a solution in which the solvent is selected from the group of materials consisting of ketones, esters, and perfluorinated solvents. Most preferably, the protective coating [26] is a random copolymer of tetrafluoroethylene (TFE) and 2,2,bis-trifluoromethyl-4,5 difluoro 1,3 dioxole, traded under the name Teflon AF (R), and the solvent is a perfluorinated solvent. Most preferably, the perfluorinated solvent is a completely fluorinated organic compound comprising primarily C.sub.8 F.sub.18 (e.g., Fluorinert FC-75 (R)).

REFERENCES:
patent: 4984246 (1991-01-01), Cabaret et al.
patent: 5084888 (1992-01-01), Tajima et al.
patent: 5084889 (1992-01-01), Tajima
patent: 5299220 (1994-03-01), Brown et al.
patent: 5373576 (1994-12-01), Minns et al.

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