Study on optical communications from deep space interim progress report, 7 nov. 1962 - 7 jan. 1963DEEP SPACEOPTICAL COMMUNICATIONCOMMUNICATIONDEEP SPACEOptical communications from deep spaceBrinkman, K. LNASA (non Center Specific)
We have performed a study on telecommunication systems for a hypothetical mission to Mars. The objective of the study was to evaluate and compare the benefits that microwave -- X-band (8.4 GHz) and Ka-band (32 GHz) and optical communications technologies afford to future missions. The telecomm...
A theoretical study is made on the steady-state self-focusing and self-defocusing of a circularly-polarized laser beam, occurring in an atomic vapor mixed with a buffer gas at a relatively high pressure. The presence of the buffer gas removes the theoretical difficulties arising from hole-burning...
Systematic Study on Nonlinear Optical Chromophores with Improved Electro-Optic Activity by Introducing 3,5-Bis(trifluoromethyl)benzene Derivative Isolation Groups into the Bridge. Molecules. 2023; 28(2):488. https://doi.org/10.3390/molecules28020488 Chicago/Turabian Style Liu, Tongtong, Fuyang Huo, ...
The stability of AuCu, Au2Cu, AuCu2, Au2Cu2, and Au3Cu clusters on the CeO2(110) surface is related to the favourable interaction between theAu and Cu d-orbitals of the clusters with theO p-orbitals on the CeO2(110) surface. On the most stable AuCu/CeO2(110) systems, two surface...
This paper presents an approximate calculation method on the transmissivities and heat loss coefficients of polycarbonate panel and window glass,and compares them with the experimental data.The results show that the transmitivity of west east channel panel is larger than that of north south channel ...
High-aperture binary axicons for the formation of the longitudinal electric field component on the optical axis for linear and circular polarizations of th... Journal of Experimental & Theoretical PhysicsS. N. Khonina and D. A. Savelyev, “High-aperture binary axicons for the formation of the...
The change in optical properties can be used as a read out for assessing the effect of the environment on the probe, enabling qualitative and quantitative measurements. Some fluorophores interact more actively with DNA and RNA than others. Nuclear magnetic resonance (NMR) studies of dsDNA with ...
In order to use non-diffracting beams to extend the depth-of-field of optical imaging systems,the variation rules of the central spot of non-diffracting beams were investigated.Based on the theory of Fresnel diffraction,the diffraction patterns were analyzed when the point source was placed in fr...
In this paper the effect of atmospheric turbulence on free space optical (FSO) communications is investigated experimentally by designing a turbulence simulation chamber. The distributions of bits '0' and '1' levels are measured with and without turbulence. The bit error rate (BER) is then obtain...