| 摘要 |
PURPOSE: To enable a superfluorescence fiber source to be stabilized in output wavelength and set optimal in efficiency, by a method wherein a pumping power control device, which stabilizes a pumping light source in output power at a prescribed reference output power level responding to a wide-band and non- wavelength dependent sample, is provided. CONSTITUTION: Pumping monitoring light rays 28 are transmitted from a pumping coupler sample output port 30 to a pumping monitoring detector 74 through a pumping monitoring fiber 72. The pumping monitoring detector 74 generates pumping monitoring signals 76 directly proportional to the output power of the pumping monitoring light rays 28, and the pumping monitoring signals 76 are inputted into a pumping power control device 78 through its terminals 80 and 82. The pumping power control device 78 feeds pumping power control signals 84 or IPMPDRV to a pumping input terminal 16 of a pumping light source 12 responding to the pumping monitoring signals 76 to make the pumping light source 12 constant in output, whereby pumping monitoring light rays 18 are substantially kept constant in optical power. |
