3843865 is referenced by 96 patents and cites 9 patents.

A device for material working by a laser beam wherein an unclad, optically and materially homogeneous quartz rod having enlarged ends tapered to a fiberlike center portion is protectively enclosed in a flexible tube. Preferably, the tube is provided with annular spacer rings of quartz glass to keep the fiber from contacting the tube wall. To provide high power and high efficiency transmission, the tube is filled with a circulating liquid having a refractive index less than that of the fiber, and the spacers are coated with substance having a refractive index which is the same as that of the liquid. The fiber is made by heating a rotating quartz rod and drawing it. The rotation is controllably slowed and stopped to prevent twisting as the rod softens. Alternatively, a quartz rod is etched to the desired form.

Device for material working by a laser beam, and method for its production
Application Number
Publication Number
Application Date
September 13, 1972
Publication Date
October 22, 1974
Nath Gunther
Wood Herron & Evans
G02b 05/14
B23k 27/00
G02B 06/42
G02B 06/44
B23K 26/06
B23K 26/00
B23K 26/14
B23K 26/42
View Original Source