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Plastic Q Switch for Giant Pulse Lasers

IP.com Disclosure Number: IPCOM000080128D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Johnson, DE: AUTHOR [+4]

Abstract

This is an improvement to the Q-switchable dye disclosed in U. S. patent 3,668,420 to J. T. Vanderslice. The Q-switchable dye is a bivalent transition metal dithiene complex (BTMDC) which serves as a saturable absorber, for use in Q-switching neodymium lasers in the 1.06 micron region. The improvement is directed to the encapsulation of the BTMDC dye in a solid matrix of polymethylmethacrylate (PMMA).

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Plastic Q Switch for Giant Pulse Lasers

This is an improvement to the Q-switchable dye disclosed in U. S. patent 3,668,420 to J. T. Vanderslice. The Q-switchable dye is a bivalent transition metal dithiene complex (BTMDC) which serves as a saturable absorber, for use in Q-switching neodymium lasers in the 1.06 micron region. The improvement is directed to the encapsulation of the BTMDC dye in a solid matrix of polymethylmethacrylate (PMMA).

The method of preparing the encapsulated dye comprises the steps of mixing prepolymerized PMMA and the BTMDC dye with a mutual solvent such as 1,2- dichloroethane, and then mixing the two respective solutions. The resulting solution is then placed between two optical flats and pressure is applied, while heating the assembly to slowly drive off the solvent. There results a compact, solid, Q-switching material whose absorption characteristics are unchanged from the precursor liquid BTMDC dye.

Prepolymerization of the PMMA prevents the exposure of the dye to the free radicals generated during the polymerization step, thereby preventing the destruction of the absorption properties of the dye.

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