Validity of beam propagation characteristics through oceanic turbulence simulated by phase screen method

2020 ◽  
Vol 49 (7) ◽  
pp. 20190452
Author(s):  
牛超君 Chaojun Niu ◽  
王晓斌 Xiaobin Wang ◽  
卢芳 Fang Lu ◽  
韩香娥 Xiang’e Han
Keyword(s):  
Beam Propagation ◽  
Phase Screen ◽  
Propagation Characteristics ◽  
Oceanic Turbulence ◽  
Screen Method

Validity of beam propagation characteristics through oceanic turbulence simulated by phase screen method

2020 ◽  
Vol 49 (7) ◽  
pp. 20190452
Author(s):  
牛超君 Chaojun Niu ◽  
王晓斌 Xiaobin Wang ◽  
卢芳 Fang Lu ◽  
韩香娥 Xiang’e Han
Keyword(s):  
Beam Propagation ◽  
Phase Screen ◽  
Propagation Characteristics ◽  
Oceanic Turbulence ◽  
Screen Method

Propagation Properties of Gaussian Array Beams Transmitted in Oceanic Turbulence Simulated by Phase Screen Method

2018 ◽  
Vol 38 (6) ◽  
pp. 0601004
Author(s):  
牛超君 Niu Chaojun ◽  
卢芳 Lu Fang ◽  
韩香娥 Han Xiang′e
Keyword(s):  
Phase Screen ◽  
Oceanic Turbulence ◽  
Screen Method ◽  
Propagation Properties

scholarly journals An Effective Way for Simulating Oceanic Turbulence Channel on the Beam Carrying Orbital Angular Momentum

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sunxiang Pan ◽  
Le Wang ◽  
Wennai Wang ◽  
Shengmei Zhao
Keyword(s):  
Angular Momentum ◽  
Power Spectrum ◽  
Phase Structure ◽  
Phase Screen ◽  
Inversion Method ◽  
Propagation Characteristics ◽  
Oceanic Turbulence ◽  
Frequency Components ◽  
Screen Model ◽  
Spectrum Inversion

Abstract In this paper, we present an effective way for simulating oceanic turbulence channel on the beam carrying orbital angular momentum (OAM). The influence caused by oceanic turbulence channel on the phase and intensity of the propagation beam is equivalent to that the beam passing through several individual phase screens generated by power spectrum inversion method at regular intervals. A modified subharmonic compensation method is then further balance the phase screen for the losses of lower frequency components in the power spectrum inversion method. The feasibility is verified by the theoretical phase structure function and the propagation characteristics of an OAM beam in underwater environment. The results show that the phase structure function and the propagation characteristics of the OAM beam evaluated by the phase screen model all coincide with those theoretical results at high spatial frequency. Simultaneously, the low frequency components could be effectively compensated by the modified subharmonic method. With the increase of the subharmonic order and sample level, the performance evaluated by the phase screen model are closer to the theoretical ones. It has provided an effective way for simulating oceanic turbulence channel for the underwater optical communications.

Ultra-wide bandwidth wavelength selective couplers based on the all solid multi-core Ge-doped fibre

2014 ◽  
Vol 22 (3) ◽  
Author(s):  
X. Li ◽  
B. Sun ◽  
Y. Yu
Keyword(s):  
Beam Propagation Method ◽  
Fibre Length ◽  
Beam Propagation ◽  
Outer Core ◽  
Central Core ◽  
Propagation Characteristics ◽  
Wide Bandwidth ◽  
Wavelength Division ◽  
Simulation Results

AbstractA novel wavelength selective coupler based on the all solid nine-core Ge-doped fibre has been proposed. The wavelength selective coupler is based on the phenomenon of a multi-core coupling. All the cores are made of Ge-doped silica and the index of central core is larger than the outer core. At the fixed fibre length, the different wavelength can be selected. The performances of coupling and propagation characteristics have been numerically investigated by using a full beam propagation method (BPM). Simulation results show that the all solid nine-core Ge-doped fibre can achieve simultaneous shorter coupler length and wideband filtering characteristics. The 0.763 mm and 0.745 mm wavelength selective coupler are proposed to achieve different wavelength division and the bandwidth is up to the 400 nm, and 300 nm, respectively.

Error analysis of phase screen method in 3-D

1996 ◽  
Vol 23 (14) ◽  
pp. 1841-1844 ◽  
Author(s):  
Ningya Cheng ◽  
Chuen Hon Cheng ◽  
M. Nafi Toksöz
Keyword(s):  
Error Analysis ◽  
Phase Screen ◽  
Screen Method

Phase Screen Method for One-Way Wave Extrapolation

1991 ◽  
Author(s):  
P.A. Costa ◽  
R.-S. Wu ◽  
M.A.B. Botelho
Keyword(s):  
Phase Screen ◽  
Screen Method
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