The farfield beam patterns after the magnetic fluid sample are simulated. The scheme for realizing the thresholdtunable optical limiters is proposed. The relationship between the output power and the incident power at several di

The principle of optical dualbalanced coherent receive is deduced using Jones matrix, the IQ signal is obtained that contains all the optical information,and the signal processing algorithm based on the IQ signal to demodulate op

An intracavity frequencytripling of a diodeedgepumped passively Qswitched 1 064 nm Nd∶YAG laser is presented to generate high power 355 nm UV laser. Several essential technologies are put forward to achieve the best beam quali

Based on systems of semiconductor lasers with two mutual timedelayed couplings and three mutual timedelayed couplings, the influence of coupling delays and coupling strength to isochronal chaos synchronization was numerically st

Tm3+ single doped and Tm3+/Yb3+ codoped tellurite glasses with the composition of TeO2ZnONa2O were prepared by meltquenching method. The intensity parameters Ωt(t=2, 4, 6), spontaneous radiative transition rates A, fluorescence

Nanostructured WO3 mixed with chloroplatinic acid was prepared by solgel method. Fiber Bragg grating was coated with the hybrid material. The asprepared powder was mixed with different ratio of chloroplatinic acid and annealed a

Environment temperature changes and vibration will cause the random change of phase difference between two arms in the MachZehnder interferometer (MZI), resulting in the instability of interferometer outputs. In this paper, the e

The UV atmospheric transmission theory and the nonline of sight single scattering channel model were introduced. According to the model, the transmission loss caused by atmospheric channel under different structure design was qua

A telescope fiber coupling system using aspheric lens for coupling freespace optical field into singlemode fiber in allfiber lidar is devised. Its layout is designed and optimized for coupling efficiency into singlemode fiber

In order to calibrate the sensitivity of fiber grating hydrophone, a calibration technique of fiber grating hydrophone was studied. In this paper, the working principle of fiber grating hydrophone was introduced firstly. Secondly,

An improved block density fast algorithm for steadying shaking image was presented. The jitter of camera system was measured by gyro, while the local motion vectors was estimated by the small area fast blockmatching algorithm, an

The dynamic performance of a PZT driver which contains an operational amplifier was studied according to the specific requirements of the image quality compensator in a lithographic objective. Firstly, the impact of the inherent f

Optical properties of trap pit morphology of multicrystalline silicon (weaklyetched, normaletched and heavyetched) were simulated by solving the Maxwell and material equations, using RF MODULE of COMSOL Multiphysics version 3.5a.

According to the differences between the white LED spectrum and the visible light spectrum, the feasibility of using optical coating to improve the spectrum is discussed. Meanwhile, a novel method is proposed to eliminate blue ban

SnO2/Ag/SnO2 trilayer thin films were prepared on glass substrates by RF magnetron sputtering of SnO2 with different O2/Ar ratio and DC magnetron sputtering of Ag. Several analytical tools such as Hall measurements, fourpoint pr

Xray crystal characteristic parameters are the bases of identification of Xray crystal species and class, kinds of Xray crystal spectrometer fabrication, Xray lines intensity quantitative measurement and Xray monochromatic im

A new method to measure the three dimensional (3D) shape is proposed. In the measurement, the elliptic fringe pattern was projected to the surface of the object and the 3D shape of the object can be reconstructed by this method ba

The squeezing effect and atomic population of the binomial field interacting with a cascade three level atom are calculated accurately without rotatingwave approximation(without RWA) by using the complete quantum theory. The infl

Two coupled cavities each containing one twolevel atom are considered, which interacts with cavity via a twophoton hopping. The evolution of the state vector of the system is given when the total excitation number equals two. Th

Quantum satellite communication can meet the requirement of quantum mobile communication among sailing, aviation field with longdistance and extensiveness communications, and onboard switching is one of the key techniques in quan

The false alarm probability of eavesdropping checks on both AliceBob quantum channel and AliceCharlie quantum channel in the controllable quantum secret sharing protocol using GreenbergerHorneZeilinger states proposed by Y. Su

Curvelet transform, as a method of multiscale geometric analysis, is more suitable for image processing than wavelet, and more appropriate for analyzing the image edge characteristics of curve and line, which has better approximat

With multiplicative noise present, SAR image segmentation becomes difficult to implement.In this paper, a new energy functional model in introduced which is based on nonconvex regularization. This new model combines the regions as

In electronic speckle pattern interferometry (ESPI), the true phase is generally extracted by the phasestepping method, which can only get the wrapped phase. Before the phase can be used to provide quantitative information, the w