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Chin. Opt. Lett.
 Home  List of Issues    Issue 10 , Vol. 06 , 2008    One-dimensional Doppler laser collimation of chromium beam with a novel pre-collimating scheme


One-dimensional Doppler laser collimation of chromium beam with a novel pre-collimating scheme
Baowu Zhang, Tongbao Li, Yan Ma
Department of Physics, [Tongji University], Shanghai 200092

Chin. Opt. Lett., 2008, 06(10): pp.782-784-3

DOI:
Topic:Atomic and molecular physics
Keywords(OCIS Code): 020.3320  140.3320  020.7010  140.7010  

Abstract
A novel pre-collimating scheme in laser-focused chromium (Cr) atomic deposition is presented. It consists of three apertures, which are one main pre-collimating aperture at centre and two probing apertures with uniform dimension at both sides of the central one. The calculations show that the Cr atomic beam is divided into three parts accordingly after going through this scheme, and the full-width at half-maximum (FWHM) of each part decreases while the peak value increases after one-dimensional (1D) Doppler laser collimation, subsequently. Compared with that before laser collimation, the central part does not have displacement, but each part of the other two has the same displacement to the centre after laser collimation. These phenomena which are agreed with experiment prove that the novel pre-collimating scheme is a feasible means to solve the problem which we cannot observe the collimation of Cr atomic beam after substrate in laser-focused deposition with a pre-collimating scheme of only one aperture, because the atoms will be obstructed completely by the substrate.

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Received:2008/5/5
Accepted:1949/10/1
Posted online:1949/10/1

Get Citation: Baowu Zhang, Tongbao Li, Yan Ma, "One-dimensional Doppler laser collimation of chromium beam with a novel pre-collimating scheme," Chin. Opt. Lett. 06(10), 782-784-3(2008)

Note: This work was supported by the National Technology Support Program of China under Grant No.2006BAF06B08. B. Zhang's e-mail address is zhangbaowu@126.com.



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