| 摘要 |
PURPOSE:To realize compactness and full control of an oscillation wavelength by making light which is transmitted through a first core combined with a second core, by projecting it, by feeding back the projected light to a laser light source, and by enabling control of the oscillation wavelength. CONSTITUTION:Light (a) from a laser light source 5 enters a first core 2 of a two-core fiber type optical divider 4 and is optically combined with a second core 3 through the core 2. Light (c) outgoing from the core 3 is transduced to an electrical signal through a photodetector 8, and the electrical signal is operated by a computing element 9. The operation result is fed back to a wavelength control circuit of a laser light source 5 and controlled to stabilize an oscillation wavelength of the laser light source 5. Thereby, it is possible to realize a small and simple measurement system and to control a wavelength stably. |
