| 摘要 |
<p>PURPOSE:To prevent sensitivity from being differently measured in the longitudinal direction of an optical fiber by measuring temperature by utilizing the temperature dependency of emission spectrum generated by exciting phosphors in an optical fiber with laser beams. CONSTITUTION:Laser beams from an exciting semiconductor laser 2 are made incident upon the optical fiber 1 doped with rare earth elements through a fiber coupler 3. At this time, light emission is isotropically generated from the fiber 1. Out of the light beams, the light radiating to the backward is made incident upon a spectro-scope 4 again through the fiber coupler 3 and the light intensity is detected by a detector 5 to measure the emission spectrum of the fiber 1. Since the phosphors are excited and light is emitted in this measuring method, the emission intensity of light is not attenuated even at the leading position of the fiber 1 in its longitudinal direction.</p> |
