衍射极限

用四波混频产生高效率衍射极限输出的染料激光

High efficiency and diffraction-limited dye laser beam generated by four-wave mixing

单瓣近衍射极限输出的带外腔半导体激光器

Single-Lobed Nearly Diffraction-Limited Output from a Laser Diode with External Cavity

衍射极限倍数N与匀强平面波源相干长度有确定的关系。

There 's determined relation between times of diffraction limit N and coherent length of a source with homogeneous intensity .

XeCl激光泵浦高压氢的衍射极限SRS斯托克斯光输出

Diffraction-limited SRS Stokes output from high pressure hydrogen pumped by XeCl laser

本论文的研究工作和成果如下：1.利用近场扫描光学显微镜（ScanningNear-FieldOpticalMicroscopy，SNOM）在偶氮聚合物薄膜表面成功的记录了突破光学衍射极限的记录点。

Dots beyond optical diffraction limit were successfully recorded on the azo-polymer films by using Scanning Near-field Optical Microscopy ( SNOM ) .

COS光束的超衍射极限传输

Super-Diffraction Limiting Propagation of cos Beams

但对高斯光束而言，应该用高斯衍射极限倍数M来代替N，以有效地说明光束的相干性。

For a beam with a Gaussian section N must be replaced by M , which we call Gaussian limit times , in order to explain the coherence of the beam .

以最高输出光束亮度为目标就其腔参数进行了优化研究和设计。f在20mm.口径钕玻璃激光介质上采用这种腔结构进行了实验研究，获得了数十焦耳近衍射极限的高亮度激光输出。

Its cavity parameters have been designed for getting optimum laser brightness and its output characterization has been investigated experimentally at Φ 20 mm Nd : glass laser .

该系统经红外传递函数测试仪测试，得出的实际MTF值也基本接近衍射极限。

The optical system has been tested by Ealing that the tested value of MTF is closely approximate to the diffracted one .

改进系统并保持原系统光学性能参数，在空间频率20lp/mm处，光学传递函数（MTF）保持在0.78以上，接近衍射极限，成像质量高而稳定。

The theoretical polychromatic modulation transfer function ( MTF ) is above 0.78 at space frequency of 20 lp / mm and is near to the diffraction-limitation .

具有单片紧凑波导结构的激光器可以获得超过10W的激光输出，获得近衍射极限的激光束。

10 W and more near diffraction-limited laser output can be obtained from lasers with compact waveguides of monolithic structure .

由于太赫兹（THz）电磁辐射的波长较长，探测的空间分辨率受到衍射极限的限制。

Because the central wavelength of terahertz ( THz ) pulse is long , the spatial resolution of the THz detection is limited to sub-millimeter due to the diffraction effect .

该改进后的系统设计结果为：当截止频率为11mm/p时，四个视场的MTF曲线均接近等于0.7，接近衍射极限。

The result of the improved system design is : when cut-off frequency is llmm / lp , curves of four fields almost equal to 0.7 approaching diffraction limit .

并在半导体激光器列阵的外腔实验研究中获得上述理论的验证，得到了远场分布光瓣宽度（FWHM）为0.46°，相应于光束质量为1.12倍衍射极限的激光输出。

With this kind of setup , a laser beam with 0.46 ° far field divergence angle ( FWHM ), which corresponding to 1.12 times diffraction limit is obtained .

光子扫描隧道显微镜（PSTM）是一种特殊的光学显微镜，它利用全内反射产生的隐失场成像，打破了传统光学显微镜衍射极限的限制，实现了纳米水平的分辨率。

Photon Scanning Tunneling Microscope ( PSTM ), which detected evanescent wave through frustrated total internal reflection , is one kind of special optical microscope .

最终获得了重复频率40Hz、单脉冲能量大于400mJ、近衍射极限的高光束质量激光输出。

More than 400 mJ , 40 Hz output laser with near diffraction limited beam quality was obtained .

本文提出采用共振增强四波混频的相反传播的泵浦光束泵浦若丹明6G酒精溶液，获得高效率衍射极限输出激光束的方法。

In this paper a way of generating high efficiency and diffraction-limited dye laser beam is proposed . In this dye laser , Rhodamine 6G solution in alcohol is pumped by counterpropagating pumping beams in four-wave mixing .

DPSSL以其效率高，频率稳定性高好，线宽窄，达到衍射极限光束，光束质量高，使用寿命长等特点，具有广阔的应用领域。

DPSSL has wide applications because of its high efficiency , high frequency stability , narrow line width , high beam quality , long service life and the diffraction limit of laser beam .

扫描近场光学显微镜（SNOM）是基于非辐射场的产生和探测，能够实现超衍射极限分辨率的光学成像。

Scanning near-field optical microscopy ( SNOM ), based on the formation and detection of non-propagating wave , is capable of optical imaging with the resolution far beyond the diffraction limit of conventional far-field optics .

给出了放电型高增益非稳腔KrF激光器具有衍射极限的激光模式建立的时间与非稳腔放大率和腔长之间的关系。

The relationship between the magnification and cavity length to the set up time of the laser mode with diffraction limited divergence in high gain KrF laser is given , and its effect on the output beam is studied .

光学衍射极限是光束在有限孔径下所能达到的最小发散度，此时波面具有大约0.3l的波面相差。

The optical diffractional limitation is the minimum divergence of a laser beam through a finite aperture . In this circumstance , the wavefront has approximately 0.3l of optical phase difference against a planar wavefront .

扫描近场光学显微术（SNOM）是一种新型纳米尺度结构和信息研究的强有力的光电子学工具，它打破了传统光学衍射极限的限制，分辨率可达到纳米量级。

Scanning near-field optical microscopy ( SNOM ) is a novel photoelectrical tool for the research down to the nanometer scale . It uses the evanescent field confined at the tiny aperture to provide images of rough surfaces with a resolution beyond the classical optical diffraction limit .

在要求远场的一倍衍射极限区域的积分能量分布达到理想情况下的90%的条件下，对于含有口径为40cm、脉宽为0.1~10ps脉冲的系统进行分析并分别得到了各种误差的容限。

With the criterion that the encircled energy in one times diffraction limit should be kept more than 90 % of the ideal case , a design is carried out for a 1 ps pulse with a size of 40 cm and the tolerances of every alignment error are obtained .

千瓦级3倍衍射极限的高功率热容激光器

Kilowatt High Power Heat Capacity Laser with 3 Times Diffraction Limit

本文报导一种以掺钕钇铝石榴石为工作物质的激光器，其输出光束达衍射极限。

A Nd : YAG laser with diffraction limited output is reported .

理想成像系统的分辨率受经典衍射极限限制。

In an ideal imaging system it is determined by diffraction limit .

现在问题变成：这个是不是衍射极限的作用？

The obvious question becomes : is this diffraction limited or not ?

存贮面积达到衍射极限。

The area of storage has been reduced to diffraction limited size .

利用具有奇异非线性光学特性的纳米粒子突破光学衍射极限

Breaking the Diffraction Limit Using Silica Nanoparticles with Exotic Nonlinear Optical Properties

近衍射极限半导体激光束波面检测

Measuring Near the Diffraction-Limited Wavefront of Semiconductor Laser Beam