Analog differential-phase detection in optical coherence reflectometer.
A novel differential-phase optical coherence reflectometer (DP-OCR) was proposed using a low-coherence source, integrating it with an analog differential-phase decoding method. In the experiment, the DP-OCR performed a localized surface profile measurement of an optical grating (1200 lp/mm) and demonstrated its ability to measure the translation speed of a tilted mirror. Experimentally, the resolution of the axial displacement of proposed DP-OCR at 185 pm was demonstrated.
Huang
Huan-Jang
HJ
Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei 112, Taiwan.
Hsieh
Tsung-Yu
TY
Chou
Li-Dek
LD
Kuo
Wen-Chuan
WC
Chou
Chien
C
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008422:Materials Testing / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D013499:Surface Properties; D041623:Tomography, Optical Coherence / Q000295:instrumentation*