Title :
Reduction of residual signals in interferometric fiber sensors
Author :
Avtabi, D. ; Buller, B. ; Tur, M.
Author_Institution :
Fac. of Eng., Tel Aviv Univ., Israel
Abstract :
We have introduced a novel technique to reduce the influence of internal backreflections on the sensitivity of interferometric fiber sensors based on frequency modulation of the source. The technique was experimentally tested and showed a reduction of 30 dB of the residual signal in the case of a single backreflection. It also appears that multiple backreflections can be dealt with by a multiplicity of modulation frequencies.
Keywords :
Michelson interferometers; fibre optic sensors; frequency modulation; optical modulation; phase noise; Michelson interferometer; frequency modulation; heterodyne frequency shift; heterodyne sensor; interferometric fiber sensors; internal backreflections; optical path difference; phase induced noise level; residual signals reduction; source optical field; Frequency modulation; Interferometers; Optical fiber sensors; Optical interferometry; Optical mixing; Optical modulation; Optical noise; Optical sensors; Phase detection; Phase noise;
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
DOI :
10.1109/OFS.2002.1000641
