| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength variable fiber laser light source capable of changing making the wavelengths at a high speed. SOLUTION: An optical fiber loop is provided with a gain medium, having gain in an oscillation wavelength by an optical fiber to form a loop. This optical fiber loop is provided with an optical circulator 13. The light extracted by the optical circulator 13 is enlarged by a collimate lens 22, and a polygon mirror 24 is provided on the optical axis. The optical axis reflected by the polygon mirror 24 is formed into parallel light by a lens 25, and a mirror 27 is provided perpendicularly to the optical axis. Moreover, a band path filter 26 for continuously changing the selected wavelength in the scanning direction is provided between the mirror and the lens 25. Thus, the selected wavelength can be changed at a high speed by the rotation of the polygon mirror 24. COPYRIGHT: (C)2006,JPO&NCIPI |
