Počet záznamů: 1

Small displacement evaluation by a highly-coherent tunable laser referenced to stabilized femtosecond comb

SYSNO ASEP	0422388
Druh ASEP	A - Abstrakt
Zařazení RIV	Záznam nebyl označen do RIV
Zařazení RIV	Není vybrán druh dokumentu
Název	Small displacement evaluation by a highly-coherent tunable laser referenced to stabilized femtosecond comb
Tvůrce(i)	Číp, Ondřej (UPT-D)_{RID, SAI, ORCID} Šmíd, Radek (UPT-D)_{RID, SAI} Hrabina, Jan (UPT-D)_{RID, ORCID, SAI} Čížek, Martin (UPT-D)_{RID, ORCID, SAI} Hucl, Václav (UPT-D)_{RID, ORCID, SAI} Lešundák, Adam (UPT-D)_{RID, ORCID, SAI} Holá, Miroslava (UPT-D)_{RID, ORCID, SAI} Růžička, Bohdan (UPT-D)_{RID, ORCID} Lazar, Josef (UPT-D)_{RID, ORCID, SAI}
Celkový počet autorů	9
Zdroj.dok.	21th annual International Conference on Advanced Laser Technologies ALT´13. Book of Abstracts. - Budva : University of Montenegro, 2013 S. 51
Poč.str.	1 s.
Forma vydání	Online - E
Akce	ALT´13. Annual International Conference on Advanced Laser Technologies /21./
Datum konání	16.09.2013-20.09.2013
Místo konání	Budva
Země	ME - Černá Hora
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	ME - Černá Hora
Klíč. slova	passive optical resonator ; highly-coherent tunable laser ; femtosecond comb
Vědní obor RIV	BH - Optika, masery a lasery
CEP	GAP102/10/1813 GA ČR - Grantová agentura ČR
	ED0017/01/01 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	EE2.4.31.0016 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UPT-D - RVO:68081731
Anotace	The work describes the method for precise detection of length changes by a passive optical resonator working as a length sensor. The method is based on spectroscopy technique where a highly-coherent tuneable laser working at 1541 nm is locked to a selected mode of the optical resonator comb spectrum. Thus, the length change of the resonator is transformed to change of the optical frequency of the laser during the measuring process. The length of the resonator is kept by a spacer made from an ultra low expansion ceramic. If a temperature cycling of the spacer inserted in a vacuum chamber is done then the inspection of the coefficient of thermal expansion (CTE) of the ceramic is possible. The optical frequency of the tuneable laser identifies the length changes of the spacer during the temperature cycling. A precise detection of the optical frequency of the tuneable laser is required at kHz level. A down conversion processing must be applied to transfer the optical frequency to radiofrequency domain. Measurement of a beat-note signal between this laser and an optical frequency synthesizer - femtosecond comb solves this task well. In this case, the beat-note is detected with a period of repetition rate of the femtosecond comb laser. The described method is able to detect changes of the length in subnanometer level but with the range of micrometers. The work presents measured data of CTE and some records of measured beat-notes during the temperature cycling of the spacer.
Pracoviště	Ústav přístrojové techniky
Kontakt	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Rok sběru	2014

Počet záznamů: 1