Compact system for high-speed velocimetry using heterodyne techniques

Autor:	W. W. Kuhlow, C. Martinez, T. L. Whitworth, Oliver T. Strand, D. R. Goosman
Rok vydání:	2006
Předmět:	Materials science Optical fiber business.industry Velocimetry Laser law.invention symbols.namesake Fourier transform Optics law Fiber laser visual_art Electronic component symbols visual_art.visual_art_medium Optical circulator Heterodyne detection business Instrumentation
Zdroj:	Review of Scientific Instruments. 77:083108
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.2336749
Popis:	We have built a high-speed velocimeter that has proven to be compact, simple to operate, and fairly inexpensive. This diagnostic is assembled using off-the-shelf components developed for the telecommunications industry. The main components are fiber lasers, high-bandwidth high-sample-rate digitizers, and fiber optic circulators. The laser is a 2W cw fiber laser operating at 1550nm. The digitizers have 8GHz bandwidth and can digitize four channels simultaneously at 20GS∕s. The maximum velocity of this system is ∼5000m∕s and is limited by the bandwidth of the electrical components. For most applications, the recorded beat frequency is analyzed using Fourier transform methods, which determine the time response of the final velocity time history. Using the Fourier transform method of analysis allows multiple velocities to be observed simultaneously. We have obtained high-quality data on many experiments such as explosively driven surfaces and gas gun assemblies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ad1c98cc312d0e97d8c1c060cabaacc8 https://doi.org/10.1063/1.2336749 Zobrazit plný text záznamu