Optical detection of ultrasound with a microchip laser

Autor:	D. C. Hurley, D. F. Fobare, Christopher P. Yakymyshyn, A. R. Duggal
Rok vydání:	1994
Předmět:	Distributed feedback laser Materials science Physics::Instrumentation and Detectors business.industry Detector Physics::Optics Laser Atomic and Molecular Physics and Optics law.invention Amplitude Optics Modulation law Ultrasonic sensor business Phase modulation Frequency modulation
Zdroj:	Optics Letters. 19:755
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.19.000755
Popis:	A novel optical ultrasonic detector that relies on frequency modulation of a microchip laser is proposed and demonstrated. When the laser is placed in a time-varying acoustic field, the microchip laser cavity length is periodically modulated, creating a frequency-modulated optical output in which the frequency shift is linearly proportional to the acoustic-wave amplitude. With a confocal Fabry-Perot slope filter and a Nd:YAG microchip laser operating at 1.06 microm, a detector response of 7.5 MHz/kPa was measured at an acoustic frequency of 7.75 MHz. A one-dimensional acoustic model is developed to explain the observed detector performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbc2c6a8616a7302469cc958e1e88707 https://doi.org/10.1364/ol.19.000755 Zobrazit plný text záznamu