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Position sensing with standing wave detection within a passive Fabry-Perot cavity
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SYSNO ASEP 0422390 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Position sensing with standing wave detection within a passive Fabry-Perot cavity Author(s) Holá, Miroslava (UPT-D) RID, ORCID, SAI
Hrabina, Jan (UPT-D) RID, ORCID, SAI
Číp, Ondřej (UPT-D) RID, SAI, ORCID
Oulehla, Jindřich (UPT-D) RID, ORCID, SAI
Lazar, Josef (UPT-D) RID, ORCID, SAINumber of authors 5 Source Title 21th annual International Conference on Advanced Laser Technologies ALT´13. Book of Abstracts. - Budva : University of Montenegro, 2013
S. 148Number of pages 1 s. Publication form Online - E Action ALT´13. Annual International Conference on Advanced Laser Technologies /21./ Event date 16.09.2013-20.09.2013 VEvent location Budva Country ME - Montenegro Event type WRD Language eng - English Country ME - Montenegro Keywords position sensing ; standing wave detection ; Fabry-Perot cavity Subject RIV BH - Optics, Masers, Lasers R&D Projects GPP102/11/P820 GA ČR - Czech Science Foundation (CSF) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.4.31.0016 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) TA02010711 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) TE01020233 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UPT-D - RVO:68081731 Annotation We present a measuring technique for displacement and position sensing over a limited range with detection of standing-wave pattern inside of a passive Fabry-Perot cavity. The concept considers locking of the laser optical frequency and the length of the Fabry-Perot cavity in resonance. Fixing the length of the cavity to e.g. a highly stable mechanical reference allows to stabilize wavelength of the laser in air and thus to eliminate especially the faster fluctuations of refractive index of air due to air flow and inhomogeneities. Sensing of the interference maxima and minima within the cavity along the beam axis has been tested and proven with a low loss photoresistive photodetector based on a thin polycrystalline silicon layer. Reduction of losses was achieved thanks to a design as an optimized set of interference layers acting as an antireflection coating. The principle is demonstrated on an experimental setup. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2014
Number of the records: 1