| 摘要 |
PROBLEM TO BE SOLVED: To provide a fiber laser device and a video display system which obtain an up-conversion fiber, and prevent that an optical axis of an optically connected portion gets deviated as a result of a temperature change, in the case where the up-conversion fiber approaches the excitation light source. SOLUTION: A first optical fiber 14, having the core to which no laser activation substance is added, is connected to the excitation light source 11. The output light of this first optical fiber 14 is input to a second optical fiber 17 having the core to which a laser activation substance is added. |
