Tunable three-dimensional intensity distribution by a pure phase-shifting apodizer
Applied Optics, Vol. 44, Issue 23, pp. 4870-4873 (2005)
http://dx.doi.org/10.1364/AO.44.004870
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Abstract
The three-dimensional distribution of light intensity that is modulated by a pure phase-shifting apodizer is studied. Results show that the Strehl ratio can be altered by the proposed apodizer and by the waist width of incident Gaussian beams. By changing geometrical parameters of the proposed apodizer, we can increase the focal depth to several times that of the original system. The proposed apodizer can also be used to realize focal splitting and local minimum of intensity, which may be advantageous for constructing an optical trap. Furthermore, the local minimum of intensity number is tunable by changing the parameters of the apodizer.
© 2005 Optical Society of America
OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1970) Diffraction and gratings : Diffractive optics
(050.5080) Diffraction and gratings : Phase shift
(140.7010) Lasers and laser optics : Laser trapping
(220.1230) Optical design and fabrication : Apodization
(220.2560) Optical design and fabrication : Propagating methods
Citation
Xiumin Gao, Zhou Fei, Wendong Xu, and Fuxi Gan, "Tunable three-dimensional intensity distribution by a pure phase-shifting apodizer," Appl. Opt. 44, 4870-4873 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-23-4870
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