Title :
A method for measuring central position of an ultra-short pulsed laser with a novel photoelectric sensor
Author :
Xinmei, Wang ; Wei, Shi ; Lei, Hou ; Sifeng, Wu
Author_Institution :
Fac. of Autom. & Inf. Eng., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
A method is presented to accurately and rapidly measure the spot central position of a Gaussian pulsed laser, especially for an ultra-short pulsed laser. The measurement system consists of a translation stage, a wide-band oscilloscope, a power source and a novel photoelectric sensor with a cross-liked slit in its anode. By moving the photoelectric sensor the spot center is positioned where the photocurrent peak reaches the maximum. Finally how to improve the sensitivity of sensor is discussed and the optimal width of the cross-liked slit is calculated.
Keywords :
high-speed optical techniques; laser variables measurement; photodetectors; position measurement; Gaussian pulsed laser; central position measurement; photocurrent; photoelectric sensor; power source; spot central position; ultrashort pulsed laser; wide band oscilloscope; Lasers; Measurement by laser beam; Optical pulse generation; Photoconductivity; Pulse measurements; Semiconductor device measurement; Sensitivity; laser; measurement; photoconductive sensor;
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Ningbo
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6066508
