The idea of feedback to actively control of quantum systems is introduced into quantum feedback control theory, which becomes more and more important part in quantum optics, atomic physics and quantum information theory. In consid

Super-resolution near-field structure （Super-RENS） is a newly developed technology based on traditional super-resolution optical disk and near-field optics. The principle of super- RENS and its applications in nano-photolithograph

The measuring system for chlorine utilization was built on a minitype jet singlet oxygen generator （JSOG）. The influence of light-source bandwidth, gas temperature, water vapor content and other gas components on the chlorine util

Based on the second-order moment of the power density, the beam width,far-field divergence angle and M2 factor of nonparaxial truncated cosh-Gaussian （ChG） beams are studied. It is found that the M^2 factor of nonparaxial truncate

Laser techniques is surging with LD-pumped solid-state laser. But, the stability, model and beam quality of the laser are strongly affected by the thermal lens effect at high power. A few estimated equations of the thermal lens fo

A new switching power supply with the function of constant-voltage and restricted- current for middle power pulse laser is presented. The operation principle and control principle of the power is analyzed, and the implement circui

Rb atoms were excited to the 5P3/2 level using a single-mode laser diode. The 5P3/2 state atom density was measured bv the absorption of line from a Rb hollow-cathode lamp. The excited atom density is combined with measured fluore

The expressions of the quantum key bit rate are given for free-space quantum key distribution by introducing the quantum channel transmission, the single-photon acquisition probability, the detection factor and the sifting factor.

An approach to constructing an artificial quantum associative memory based on entanglement （QuEAM） is discussed. The QuEAM is an exponential increase in the capacity of the memory when compared to classical associative memories su

The characteristics of switching and self-trapping of two Bose-Einstein condensate （BEC） solitons trapped in the cigar-shaped harmonic traps are investigated by the variational approach. The effects of the cigar-shaped traps on th

The band gap structure and filter properties in one dimensional photonic crystals with quasiperiods were studied. The transmission spectra were calculated in photonic crystal with quasiperiodic structure arranged alternatingly by

One kind of polarization splitter using two-dimensional photonic crystals is shown in this study. Both finite-difference time-domain simulations and equi-frequency contour plots in the first Brillouin zone are used to demonstrate

The atomic entropy squeezing in Raman transition is studied by means of quantum information entropy theory. The influences of the initial parameters of the system on the atomic information entropy squeezing are presented. It is sh

By making use of thermo-field dynamics （TFD）, the quantum fluctuations of current of the mesoscopic lossless transmission line in the vacuum state, the coherent states and the squeezed states with thermal noise have been studied.

The time evolution of a quantum state of mesoscopic LC circuit are studied in detail by using thermo-field dynamics （TFD） at a finite temperature. The result indicates that the quantum state of a mesoscopic LC circuit evolves from

Self-triggering pulsed laser ranging, a novel pulsed laser ranging method, can solve the dilemma between ranging precision and measuring speed in the traditional laser ranging technique. The ranging precision and measuring speed a

Machanism of laser altimeter energy attenuation in atmosphere is analyzed, and using data of USA standard atmospheric mode middle latitude zone in fine and foggy days, slantwise transmissivities of 1.064μm and 0.86 μm relating to

GaAs/AlAs heterojunction has been widely used in practice for various devices. Band offsets at semiconductor heterojunctions are fundamental parameters which govern the transport properties to miroelectronic devices. Recent theore

The dynamical localization of an exciton in asymmetric double quantum dot molecule with an alternating-current field is studied. The phenomenon of localization of an excition in the quantum system is analyled with two-level system

With microelectronics plane technology, electron beam evaporation is used to deposit metal Au on the surface of n-4H-SiC to form Schottkv contact, alloys Ti, Ni, Ag used to form Ohmic contact on the n＋ backside, the Schottkv barri

The fundamental space filling mode of photonic crystal fibers can be designated HE11 mode following conventional mode classification. A comparison is made between the vectorial method and the scalar method when identical parameter

The theoretical studies of the upper state population inversion ratio for erbiumdoped tellurite-based fiber amplifier（EDTFA） are presented, and its distribution curves with the activated fiber length, each channel signal input pow

The evolution equations for the parameters of the optical Gaussian-shaped pulse in optical fibers are derived by means of variational method from the MNLS equation. Then three important restricted relations between amplitude and w

A fiber Bragg grating current sensing configuration is introduced and experimented. High-current is conversed to low-voltage by Rogowski coil. Based on magnetostrictive effect of piezoelectric ceramic low-voltage is conversed into

A novel temperature sensor has been performed, which is based on the cascaded long-period fiber gratings. When only the temperature of the fiber between the LPGs is increased, the interferometric peaks will theoretically shift to

We measured the angle scattering coefficient of near ground atmosphere to 532nm laser bv experiment. The angle scattering coefficient of aerosol were calculated using both the Junge or Deirmendjian distribution. The calculated cur