Research on the Abnormal Distortion and Controlof Gaussian Beam in Circular Aperture Diffraction

2021 ◽  
Author(s):  
qizhen wang ◽  
Xia P
Keyword(s):  
Gaussian Beam ◽  
Circular Aperture ◽  
Aperture Diffraction

Far-field Divergence for Collimated Gaussian Beam Diffracted by a Circular Aperture

2015 ◽  
Vol 44 (11) ◽  
pp. 1105001
Author(s):  
王超 WANG Chao ◽  
江伦 JIANG Lun ◽  
董科研 DONG Ke-yan ◽  
安岩 AN Yan ◽  
姜会林 JIANG Hui-lin
Keyword(s):  
Gaussian Beam ◽  
Far Field ◽  
Circular Aperture

scholarly journals Thin Light Tube Formation by Tightly Focused Azimuthally Polarized Light Beams

ISRN Optics ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Svetlana N. Khonina ◽  
Andrey V. Ustinov
Keyword(s):  
Numerical Aperture ◽  
Polarized Light ◽  
Transmission Function ◽  
Tube Formation ◽  
Destructive Interference ◽  
Circular Aperture ◽  
Theoretical And Numerical Analysis ◽  
Diffractive Axicon ◽  
Aperture Diffraction ◽  
Light Beams

Theoretical and numerical analysis of the transmission function of the focusing system with high numerical aperture was conducted. The purpose of the study was to form a thin light tube in a focal area using the azimuthally polarized radiation. It was analytically shown that, due to destructive interference of two beams formed by two narrow rings, it is possible to overcome not only the full aperture diffraction limit but also the circular aperture limit. In this case, however, the intensity at the center of the focal plane is significantly reduced, which practically leads to the tube rupture. It was numerically shown that long thin one-piece tubes may be formed through the aperture apodization with diffractive axicon phase function or with complex transmission function of Laguerre-Gaussian or Airy-Gaussian beams.

Transmission of a Gaussian beam through a circular aperture

1986 ◽  
Vol 25 (24) ◽  
pp. 4514 ◽  
Author(s):  
Kiyoji Uehara ◽  
Hisashi Kikuchi
Keyword(s):  
Gaussian Beam ◽  
Circular Aperture

scholarly journals KAJIAN KOMPUTASI NUMERIK MODEL INTEGRATIF PADA DIFRAKSI CELAH LINGKARAN MENGGUNAKAN METODE PENDEKATAN SIMPSON 1/3

2019 ◽  
Vol 4 (2) ◽  
pp. 131-141
Author(s):  
Freinademetz Anggur ◽  
Ali Warsito ◽  
Albert Zicko Johannes ◽  
Andreas Christian Louk
Keyword(s):  
Light Intensity ◽  
Numerical Computation ◽  
Maximum Intensity ◽  
Circular Aperture ◽  
Integration Approach ◽  
Circular Slit ◽  
Calculation Results ◽  
Approach Method ◽  
Aperture Diffraction ◽  
Second Peak

Abstrak  Telah dilakukan penelitian tentang   komputasi numerik model integratif pada difraksi celah lingkaran dengan tujuan untuk menerapkan metode simpson 1/3 untuk mencari solusi kasus difraksi celah lingkaran, menghitung nilai integrasi bessel menggunakan metode simpson 1/3, menentukan jarak antara dua intensitas pada pita terang, memperoleh grafik pola intensitas cahaya terhadap jarak pada kasus difraksi celah berbentuk lingkaran. Hasil integrasi yang diperoleh dengan metode simpson 1/3  pada tiga titik puncak intensitas  yaitu 0.14352548, -0.3342371, 0.27050545 Dari hasil perhitungan pada puncak pertama untuk intensitas maksimum pada terang pusat yang berada pada jarak 0.3 cm dengan nilai intensitas 0.91553621, puncak kedua pada jarak 5.1 cm dengan nilai intensitas 0.01718022 dan pucak ketiga pada jarak 8.6 cm dengan nilai intensitas 0.00395745. Dari hasil perhitungan diperoleh grafik antara jarak dengan intensitas sehingga terdapat pola yang membentuk cincin gelap terang semakin besar panjang gelombang sumber maka semakin besar pula jarak antara suatu titik intensitas dari intensitas maksimum. Hasil perhitungan menunjukkan bahwa pendekatan integrasi simpson 1/3 hampir mendekati hasil yang telah diperoleh secara analitik. Dari hasil ini dapat dihitung nilai error dari program terhadap nilai eksak secara analitik dan diperoleh nilai pendekatan yang kecil yaitu -7.95 x 10-6, -6.07 x 10-6, 2.25 x 10-6. Sehingga hasil pendekatan dengan metode Simpson dapat diterima serta dapat dikatakan bahwa program yang dibuat telah berfungsi dengan baik.  Kata kunci: Bessel; metode Simpson 1/3; difraksi celah lingkaran.   Abstract  [Numerical Computation Study Of Integrative Models In The Circular Aperture Diffraction With Simpson 1/3 Approach Method] Research on numerical computation of integrative models on the circular aperture diffraction with the aim to apply the Simpson 1/3 method to find a solution to the circular aperture diffraction case, calculate the integration value of the Bessel using the Simpson 1/3 method, determine the distance between two intensities on the bright band, obtain graph of the pattern of light intensity versus distance in the case of circular slit diffraction. The integration results obtained by the Simpson method at three intensity peaks are 0.14352548, -0.3342371, 0.27050545 From the results of the calculation at the first peak for maximum intensity at the center of light at a distance of 0.3 cm with an intensity value of 0.91553621, the second peak at a distance of 5.1 cm with an intensity value of 0.01718022 and a third peak at a distance of 8.6 cm with an intensity value of 0.00395745. From the calculation results obtained by the graph between the distance with intensity so that there is a pattern that forms a dark ring of light the greater the source wavelength, the greater the distance between an intensity point from the maximum intensity. The calculation results show that the Simpson 1/3 integration approach is almost close to the results that have been obtained analytically. From these results, an error value from the program can be calculated analytically and the exact value of the approach obtained is -7.95 x 10-6, -6.07 x 10-6, 2.25 x 10-6. So the results of the approach with the Simpson 1/3 method can be accepted and it can be said that the program created has functioned well.  Keywords: Bessel;  Simpson 1/3methods;  circular aperture diffraction.

Near-field behavior from circular aperture antenna and tunable gain of a super-Gaussian beam

2011 ◽  
Vol 58 (12) ◽  
pp. 1041-1050
Author(s):  
Xinrong Shi ◽  
Yuan'an Liu ◽  
Fang Liu ◽  
Kaiming Liu ◽  
Gang Xie
Keyword(s):  
Gaussian Beam ◽  
Near Field ◽  
Circular Aperture ◽  
Aperture Antenna ◽  
Field Behavior

Field of a Truncated Gaussian Beam as Given by the Boundary-Diffraction-Wave Theory

1972 ◽  
Vol 50 (3) ◽  
pp. 259-263 ◽  
Author(s):  
Russell Boulay ◽  
John W. Y. Lit
Keyword(s):  
Gaussian Beam ◽  
Incident Wave ◽  
Wave Theory ◽  
Numerical Results ◽  
Circular Aperture ◽  
Diffraction Wave ◽  
Kirchhoff Integral ◽  
Truncated Gaussian ◽  
Good Agreement

The field of an incident wave with a Gaussian irradiance distribution diffracted by a circular aperture has been evaluated by using the boundary-diffraction-wave theory. Numerical results of the irradiance distributions, both along the axis and in transverse planes, are compared with those given by the Kirchhoff integral. Good agreement is obtained in all cases over wide regions of the diffracted field.

Crossover from spherical particle Mie scattering to circular aperture diffraction

2014 ◽  
Vol 31 (11) ◽  
pp. 2362 ◽  
Author(s):  
William R. Heinson ◽  
Amitabha Chakrabarti ◽  
Christopher M. Sorensen
Keyword(s):  
Spherical Particle ◽  
Mie Scattering ◽  
Circular Aperture ◽  
Aperture Diffraction
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