Partially coherent polarized atmospheric transmission characteristics and application technology research
2014
Based on partially coherent polarized light transmission characteristics of the atmosphere, an intensity expression of
completely coherent flashing light is derived from Andrews scale modulation method. According to the generalized
Huygens-Fresnel principle and Rytov theory, the phase fluctuation structure function is obtained on condition that the
refractive index profile in the atmosphere meet Von Karman spectrum, then get the arrival Angle fluctuation variance.
Through the RMS beam width of gaussian beams in turbulent atmosphere, deviation angle formula of fully coherent
gaussian beams in turbulence atmosphere is attained, then get the RMS beam width of partially coherent and derivation
angle expression of GSM beam in turbulent atmosphere. Combined with transmission properties of radial polarized laser
beam, cross spectral density matrix of partially coherent radially polarized light can be gained by using generalized
huygens-fresnel principle. And light intensity and polarization after transmission can be known according to the unity of
coherence and polarization theory. On the basis of the analysis model and numerical simulation, the simulation results
show that: the light spot caused by atmospheric turbulence of partially coherent polarization will be superior to
completely polarized light.Taking advantage of this feature, designed a new wireless suppression technology of
atmospheric turbulence, that is the optimization criterion of initial degree of coherent light beam. The optimal initial
degree of coherent light beam will change along with the change of atmospheric turbulence conditions,make control the
beam’s initial degree of coherence to realize the initial degree of coherence of light beam in real time and dynamic
control. A spatial phase screen before emission aperture of fully coherent light is to generate the partially coherent light,
liquid crystal spatial light modulator is is a preferable way to realize the dynamic random phase. Finally look future of
the application research of partially coherent light.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
1
References
1
Citations
NaN
KQI