Influence of the Inclination of the Fiber End Surface in Calibration of Coupling Energy of a Pyrometer

The influence of inclination of the fiber end surface to coupling energy of a pyrometer and variation of the accepting angle of the fiber caused by the inclination is calculated. Results show that the inclination of the fiber end surface influences the coupling energy very much. At the same time, the inclination of the fiber end surface makes the accepting angle of the fiber a great deal. Connecting these results with the actual experiment and calibration situation, the influence of inclination of the fiber end surface to calibration is discussed and a more effective calibration technique is proposed.