Abstract
The resonant frequency in a piezoelectric crystal is strongly temperature dependent. This physical property may be exploited to measure small overheating of the material induced by a weak optical absorption. A sample of congruent LiNbO/sub 3/ is exposed to a laser beam, with a wavelength /spl lambda/ chosen inside the transparency window. One of the piezoelectric resonances is selected and used as an internal thermal probe to record both dynamical and steady state overheating induced by the residual absorption k of the material. A bolometer-type equation describing the time dependence of the sample temperature is used to determine k accurately, the capacitance-rather than frequency-being the temperature-sensitive electrical parameter of the resonance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
