title: Simultaneous measurement of thermo-optic and thermal expansion coefficients with a single arm double interferometer.
abstract: A low-cost single arm double interferometer was developed for the concurrent measurement of linear thermal expansion (α) and thermo-optic (dn/dT) coefficients of transparent samples with plane and parallel surfaces. Owing to its common-path optical arrangement, the device is compact and stable, and allows the simultaneous measurement of interferences arising from a low-finesse Fabry-Perot etalon and from a Mach-Zehnder-type interferometer. The method was demonstrated with measurements of solid (silica, BK7, SF6) and liquid (water, ethanol and acetone) samples.
authors.forename: Jose Francisco Miras
authors.initials: JF
authors.lastname: Domenegueti
authors.forename: Acacio A
authors.initials: AA
authors.lastname: Andrade
authors.forename: Viviane
authors.initials: V
authors.lastname: Pilla
authors.forename: Sergio Carlos
authors.initials: SC
authors.lastname: Zilio