fhb 中文意思是什麼
fhb
解釋
澄海-
When a collimated - well gaussian laser beam passes through a 27i - phase plate and then focused by a lens, a focused hollow beam ( fhb ) will be generated behind the lens, as a result of the completely ( r = 0 ) and partially ( r 0 ) destructive interference effects around the central region of the beam
當一束準直的高斯光束通過具有2位相分佈的位相片和一個薄透鏡時，這將導致在入射高斯光束中心的完全和部分相消干涉效應，於是在透鏡后就會形成一束聚焦中空光束（ fhb ） 。 -
In the focal plane of z = 0, the smaller the dss of the fhb, the higher the optical potential, and the greater the corresponding optimal detuning 8, which are beneficial to atomic lens because it cannot only be profitable to obtain an atomic lens with a higher resolution, but also helpful to reduce the spontaneous emission and photon scattering effects of atoms in the fhb
在焦平面上，聚焦中空光束的dss越小，光學勢越大，相應的最佳失諧量越大，這對原子透鏡的性能越有利。因為這不僅容易得到高解析度的原子透鏡，而且還可以減少在聚焦中空光束中原子的自發輻射和光子散射效應。 -
In addition, the blue - detuned fhb can also be used cool and trap neutral atoms, even to study the adiabatic compression ( heating ) and expansion ( cooling ) of atoms in the fhb
此外，這一藍失諧的聚焦中空光束還可以用於中性原子的激光冷卻與囚禁，甚至用於研究冷原子在聚焦中空光束中的絕熱壓縮（加熱）和絕熱膨脹（冷卻）過程。 -
Our study shows that two models are in good agreement with the numerical results derived from the fresnel diffraction theory from - r0 to + r0 in the radial position. we discuss some potential applications of the blue - detuned fhb
從這兩種擬合的效果來看，在徑向位置- r _ 0到r _ 0的范圍內，這兩種光束模型與數值計算結果擬合的非常好。 -
From the fresnel diffraction equation, we calculated the intensity distribution of the fhb in free space, and found that there is an interested propagation property of the fhb before the focal plane. that is, with the increase of the propagation distance z, the dark spot size ( dss ) of the fhb is first increased, and then decreased, the dss has the maximum value at the position of z = - f / 2
發現在焦平面之前有一個非常有趣的傳播性質，即隨著傳播距離z的增加，這一聚焦中空光束的暗斑尺寸（ dss ）先從另變大然後再變小，最大的暗斑尺寸的位置在z = f / 2處。
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