Pulsed digital micro-holography of femto-second order by wavelength division multiplexing
| Autor: | Xiaolei Wang, Hongchen Zhai |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
business.industry Holography Physics::Optics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Pulse (physics) Interferometry symbols.namesake Optics Fourier transform law Wavelength-division multiplexing symbols Spatial frequency Electrical and Electronic Engineering Physical and Theoretical Chemistry business Digital holography |
| Zdroj: | Optics Communications. 275:42-45 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2007.03.014 |
| Popis: | Wavelength division multiplexing (WDM) used in a pulsed digital micro-holographic system to record ultra-fast processing of the order of femto-second is reported for the first time, where a BBO crystal is used to generate harmonic wave of the incident laser wave, and both of the basic and the frequency doubled waves are time-delayed and introduced to a Michelson’s interferometer to record two sub-holograms with different spatial frequencies on a single frame of a CCD by WDM. In the experiment, an ultra-fast dynamic process of air ionization induced by a single femto-second laser pulse is holographic recorded by this system, and both of intensity and phase difference images digitally reconstructed are obtained through Fourier transformation and digital filtering, which shows clearly the dynamic process of formation and propagation of the plasma, with a time resolution of the order of femto-second. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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