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High longitudinal selectivity of shifting multiplexing in volume holograms |
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| Authors: | Ching-Cherng Sun You-Nian Lin Shih-Po Yeh Wei-Chia Su Yuh Ouyang |
| Affiliation: | a Institute of Optical Sciences, National Central University, 32054, Chung-Li 320, Taiwan b Graduate Program of Electro-Optical Engineering, Tatung University, Taipei 104, Taiwan c Department of Physics, Chinese Military Academy, Fengshan Kaohsiung 830, Taiwan |
| Abstract: | High longitudinal selectivity of the shifting multiplexing with spherical reference wave is proposed and demonstrated. A simplified method based on wave optics is used for calculating the selectivity, and the result fits well the experimental measurement. Under the paraxial condition, a simple formula for the longitudinal selectivity is introduced. With use of an object lens with effective NA=0.817, we obtain that an FWHM of selectivity is as small as 1 μm. |
| Keywords: | Shifting sensitivity Holography storage Volume hologram Photorefractive crystal Confocal microscope |
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