| 摘要 |
PROBLEM TO BE SOLVED: To improve maintainability and heat radiation in an optical fiber for fiber laser, and to effectively exclude extraordinary light made incident on the optical fiber. SOLUTION: One end of an oscillation optical fiber 22 is held in a holding groove 80, formed on the upper face of a lower block 76 and V-shaped in the cross section. On an upper block 74, at a place opposite to the holding groove 80 of the lower block 74, a slit 96 is formed that makes a sapphire rod 94 insertable from above and that is designed to guide it so as to make it movable frictionally in the perpendicular direction. The sapphire rod 94 is brought in contact with the upper face of the oscillating optical fiber 22 and is held, in a manner frictionally movable on both the inner wall faces in the lower end of the slit 96. The screw-in amount of a bolt 100 is varied, so that the spring pressure of a compression coil spring 102, namely, a pressurizing force with respect to the oscillation optical fiber 22 can be adjusted. COPYRIGHT: (C)2008,JPO&INPIT |
