scholarly journals The far-field divergence angle and the far-field radiant intensity distribution of Gaussian Schell-model array beams

2009 ◽  
Vol 58 (7) ◽  
pp. 4624
Author(s):  
Ji Xiao-Ling ◽  
Li Xiao-Qing
Keyword(s):  
Intensity Distribution ◽  
Divergence Angle ◽  
Far Field ◽  
Radiant Intensity

Investigation of beam pointing stability, far-field divergence angle and power density distribution of a high-power CO2 laser

1996 ◽  
Author(s):  
Ruediger Maestle ◽  
Wilfried Plass ◽  
J. Chen ◽  
Christian Hembd-Soellner ◽  
Adolf Giesen ◽  
...  
Keyword(s):  
Density Distribution ◽  
Power Density ◽  
High Power ◽  
Divergence Angle ◽  
Far Field ◽  
Power Density Distribution

Spatial Distribution of Radiant Intensity from Primary Sources for Atomic Absorption Spectrometry. Part I: Hollow Cathode Lamps

1995 ◽  
Vol 49 (4) ◽  
pp. 413-424 ◽  
Author(s):  
Albert Kh. Gilmutdinov ◽  
Bernard Radziuk ◽  
Michael Sperling ◽  
Bernhard Welz ◽  
Konstantin Yu. Nagulin
Keyword(s):  
Spatial Distribution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Intensity Distribution ◽  
Hollow Cathode ◽  
Imaging System ◽  
Absorption Spectrometry ◽  
Operating Conditions ◽  
Radiant Intensity ◽  
Warm Up

The spatial distribution of radiant intensity from hollow cathode lamps used as radiation sources in atomic absorption spectrometry is investigated with a digital photodiode array imaging system. Intensity distribution over the cross section of each lamp is measured for both atomic and ionic lines of the analyte and the filler gas. The shape of the distribution is strongly dependent on the hollow cathode diameter. In small cathodes the distribution has the shape of a paraboloid with maximum intensity at the hollow cathode axis for all of the recorded lines. The intensity distributions of lines emitted from large cathodes are nonparaboloid and in some cases have a minimum at the cathode axis and a maximum concentric to the cathode walls. It is shown that the intensity distribution for a given lamp has practically the same shape for all currents applied. Data on the evolution of the intensity distribution during warm-up of the lamps and under various operating conditions are presented.

scholarly journals Research on the development of a method of spatially temporary smoothing of a high-power laser beam

1999 ◽  
Vol 17 (4) ◽  
pp. 603-611 ◽  
Author(s):  
V.N. DERKACH ◽  
S.V. BONDARENKO ◽  
S.G. GARANIN ◽  
A.I. GROMOV ◽  
S.J. GUS'KOV ◽  
...  
Keyword(s):  
Intensity Distribution ◽  
Transport Process ◽  
Energy Transport ◽  
Plasma Layer ◽  
Phase Plate ◽  
Transverse Displacement ◽  
Far Field ◽  
Power Laser ◽  
Spatial Size ◽  
Phase Distortions

The investigations of the influence of various types of wavefront distortions, varying in time, on the intensity distribution on the surface of a target are carried out. It is shown that distortions of a wavefront, equivalent to transverse displacement in time of a beam in far field at an angle of approximately 10 diffraction angles, results in practically full smoothing of a specl-structure of intensity distribution. Creation of phase distortions of a beam assigned as running in a cross section wave with an amplitude of more than 3 radian and with a spatial size exceeding 20–30 times the size of the kinoform phase plate element, permits us to reduce the depth of modulation in distribution of intensity in far field also. The capability of application is considered as a smoothing device of the dynamic plasma layer, based on the volume-structured medium. The model of energy transport process in such media is developed. Matching of calculation and experimental results is conducted.

Reduction of the Far-Field Divergence Angle of an 850 nm Multi-Leaf Holey Vertical Cavity Surface Emitting Laser

2011 ◽  
Vol 28 (8) ◽  
pp. 084209 ◽  
Author(s):  
Kang Zhou ◽  
Chen Xu ◽  
Yi-Yang Xie ◽  
Zhen-Bo Zhao ◽  
Fa Liu ◽  
...  
Keyword(s):  
Divergence Angle ◽  
Cavity Surface ◽  
Far Field ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

scholarly journals Single-Mode Vertical-Cavity Surface-Emitting Laser Array With High Power and Narrow Far-Field Divergence Angle

2013 ◽  
Vol 5 (6) ◽  
pp. 1502508-1502508 ◽  
Author(s):  
Jin-Wei Shi ◽  
Kai-Lun Chi ◽  
Jin-Hao Chang ◽  
Zhi-Rui Wei ◽  
Jia-Wei Jiang ◽  
...  
Keyword(s):  
High Power ◽  
Single Mode ◽  
Divergence Angle ◽  
Cavity Surface ◽  
Far Field ◽  
Laser Array ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity
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