Measurement of the Second-Order Degree of Coherence by Means of a Wavefront Shearing Interferometer

1971 ◽  
Vol 10 (7) ◽  
pp. 1567 ◽  
Author(s):  
D. N. Grimes
Keyword(s):  
Second Order ◽  
Degree Of Coherence ◽  
Order Degree

Experimental Investigation of the Second-order Degree of Coherence for the Various Light Fields

2014 ◽  
Vol 20 (1) ◽  
pp. 1-7
Author(s):  
刁文婷 DIAO Wen-ting ◽  
何军 HE Jun ◽  
刘贝 LIU Bei ◽  
王杰英 WANG Jie-ying ◽  
王军民 WANG Jun-min
Keyword(s):  
Experimental Investigation ◽  
Second Order ◽  
Light Fields ◽  
Degree Of Coherence ◽  
Order Degree

Correction of the second-order degree of coherence measurement

2016 ◽  
Vol 14 (7) ◽  
pp. 072701-72704 ◽  
Author(s):  
Congcong Li Congcong Li ◽  
Xiangdong Chen Xiangdong Chen ◽  
Shen Li Shen Li ◽  
and Fangwen Sun and Fangwen Sun
Keyword(s):  
Second Order ◽  
Degree Of Coherence ◽  
Order Degree ◽  
Coherence Measurement

scholarly journals Photon number distribution and second-order degree of coherence of a chaotic laser: analysis and experimental investigation

2017 ◽  
Vol 66 (12) ◽  
pp. 120502
Author(s):  
Lan Dou-Dou ◽  
Guo Xiao-Min ◽  
Peng Chun-Sheng ◽  
Ji Yu-Lin ◽  
Liu Xiang-Lian ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Photon Number ◽  
Second Order ◽  
Number Distribution ◽  
Degree Of Coherence ◽  
Chaotic Laser ◽  
Order Degree ◽  
Laser Analysis ◽  
Photon Number Distribution

III Ieasurement of the Second Order Degree of Coherence

1967 ◽  
pp. 71-104 ◽  
Author(s):  
M. Françlon ◽  
S. Mallick
Keyword(s):  
Second Order ◽  
Degree Of Coherence ◽  
Order Degree

Thermo vacuum state for Gaussian-enhanced chaotic light

2017 ◽  
Vol 31 (13) ◽  
pp. 1750151
Author(s):  
Wei-Feng Wu ◽  
Hong-Yi Fan
Keyword(s):  
Density Operator ◽  
Quantum Fluctuation ◽  
Photon Number ◽  
Vacuum State ◽  
Second Order ◽  
Normalization Constant ◽  
Partial Trace ◽  
Degree Of Coherence ◽  
Order Degree ◽  
Thermo Vacuum State

In nature, there exists superposition of Gaussian light and chaotic light, so we introduce the density operator for describing the Gaussian-enhanced chaotic light (GECL). By virtue of the method of integration within ordered product (IWOP) of operators, we derive its normalization constant. Then, by virtue of the partial trace method, we derive its thermo vacuum state and this may greatly simplify the calculation of photon number average and quantum fluctuation in GECL. It is demonstrated that the second-order degree of coherence of GECL is larger than 2.

On second order degree of graphs

2011 ◽  
Vol 28 (1) ◽  
pp. 171-182
Author(s):  
Gabriela Araujo-Pardo ◽  
Camino Balbuena ◽  
Mika Olsen ◽  
Pilar Valencia
Keyword(s):  
Second Order ◽  
Order Degree

Disappearance Voltage Determinations Using a Convergent Beam

1971 ◽  
Vol 29 ◽  
pp. 184-185
Author(s):  
W. L. Bell
Keyword(s):  
Second Order ◽  
Objective Method ◽  
Uniform Thickness ◽  
Rocking Curve ◽  
Crystal Perfection ◽  
Kikuchi Line ◽  
Central Maximum ◽  
Diffraction Patterns ◽  
Convergent Beam ◽  
Beam Technique

Disappearance voltages for second order reflections can be determined experimentally in a variety of ways. The more subjective methods, such as Kikuchi line disappearance and bend contour imaging, involve comparing a series of diffraction patterns or micrographs taken at intervals throughout the disappearance range and selecting that voltage which gives the strongest disappearance effect. The estimated accuracies of these methods are both to within 10 kV, or about 2-4%, of the true disappearance voltage, which is quite sufficient for using these voltages in further calculations. However, it is the necessity of determining this information by comparisons of exposed plates rather than while operating the microscope that detracts from the immediate usefulness of these methods if there is reason to perform experiments at an unknown disappearance voltage.The convergent beam technique for determining the disappearance voltage has been found to be a highly objective method when it is applicable, i.e. when reasonable crystal perfection exists and an area of uniform thickness can be found. The criterion for determining this voltage is that the central maximum disappear from the rocking curve for the second order spot.

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