A novel closed-form expression for average capacity is derived for free-space optical (FSO) links over Gamma-Gamma turbulence channels by considering the effect of misalignment (pointing errors). The simulation results show that t

Lower tropospheric water vapor measurements are performed at nighttime using the mobile atmosphere monitoring lidar-2 (AML-2) which is operated by the Anhui Institute of Optics and Fine Mechanics. In this lidar system, a 354.7-nm

The relations between scattering angle (SA) and the degree of polarization (DOP) of skylights are studied. Measurements under different sky conditions demonstrate that all relation curves between SA and DOP can be described as par

An experiment on measuring the magnetic field in Ramsey interaction region of the atomic fountain clock by detecting the Zeeman frequency shift of ⁸⁷Rb hyperfine transition is presented. By mu-metal shielding and coils

The wave packet dynamics of the photodetachment of H^- near dielectric surface are studied by using the wave packet evolution and the autocorrelation function. The results show that the evolutions of the autocorrelation

Using the effective medium theory and the waveguide eigenvalue equation, we design a multimode planar periodic waveguide. When a plane wave illuminates the grating at the designed angle and wavelength, more than one leaky modes ar

A novel structure for ultra long span optical transmission systems is proposed. In the scheme, the inverse fast Fourier trans form (IFFT) is used as a way of inverse multiplexing. A 40-Gb/s (total effective capacity) system based

Stray light analysis of a three-mirror spatial optical system is presented. The entrance pupil diameter (EPD) of the system is 320 mm, the e?ective focal length (EFL) is 2809 mm, and the field of view (FOV) is 1°×0.5°. Its walls a

Harris corner detector is a classic tool to extract feature. It is stable to illumination change and rotation but unstable to more complicated transform. In order to register images with different viewpoints, we extend Harris corn

A novel personal recognition system utilizing palm vein patterns and a novel technique to analyze these vein patterns is presented. The technique utilizes the curvelet transform to extract features from vein patterns to facilitate

A multi-parameter fusion algorithm (MPFA) for auto-focus (AF) is discussed. The image sharpness evaluation algorithm (ISEA) and zoom tracking method (ZTM) are combined for AF. The zoom motor position (z) and background complexity

Light propagation through a metal/nonlinear dielectric material/metal (M-NL-M) structure is numerically studied. The design parameters of the M-NL-M structure are found with the waveguide theory so that the structure only supports

We investigate a theoretical model to accurately predict the output performances of slab laser amplifiers, which is one of the key issues in the study of space-based lasers. The realistic absorbed pump energy density, which induce

High-power vertical-cavity surface-emitting lasers (VCSELs) are processed using a wet thermal-selective oxidation technique. The VCSEL chips are packaged by employing three different bonding methods of silver solder, In-Sn solder,

The method of fitting damage probability curves of laser-induced damage is introduced to investigate the laser-conditioning mechanism of ZrO2/SiO2 high re°ection (HR) films. The laser-induced damage thresholds (LIDTs) of the sampl

A practical method for evaluating the three-dimensional (3D) position and velocity of a moving object used in the parabolic flight experiment is developed by using the binocular stereo vision measurement theory. The camera calibra

AlPO4 mesoporous glass doped with perylene orange (PO) is prepared using two steps. The effects of dipping time and PO concentration on the fluorescent properties and molecular formation are investigated through absorption spectra

Phase mismatching for third-harmonic generation (THG) in barium metaborate (BBO) crystal is investigated in detail. Upon using BBO crystal in the Type I (oo→e) scheme, in the two independent planes (principal section of the crysta

The influence of laser conditioning on defects of HfO2 monolayer films prepared by electron beam evaporation (EBE) is investigated utilizing the spot-size effect of the laser-induced damage. It is found that the laser-induced dama

A TiO2/porous silicon (PS) composite system is prepared by chemical vapor deposition. The crystal form with anatase phase of the samples is evaluated by X-ray diffraction and ultraviolet-visible (UV-vis) absorbance spectra, and th

High performance optical coating requires excellent uniformity of thin-film. Keeping the surface of evaporation material flat is propitious for the stability of vapor plume, and can improve the uniformity of thin-film. Based on th

The optical performance of thin film polarizers is highly sensitive to the layer thicknesses of thin film. The thicknesses of the sensitive layers are optimized in order to gain broader polarizing zone in such case when the total

We use the three-dimensional finite-difference time-domain (3D-FDTD) method to model silica tapermicrofiber structures integrated on substrates. The dependence of the transmission on the length of the microfiber is investigated fo

A new-style silica planar lightwave circuit (PLC) hybrid integrated triplexer, which can demultiplex 1490-nm download data and 1550-nm download analog signals, as well as transmit 1310-nm upload data, is presented. It combines SiO

A reflection-mode photoacoustic microscope (PAM) for rat brain imaging in vivo is constructed. A pulsed laser is used as an excitation source, and a focused ultrasound transducer is adopted to collect the photoacoustic signal. Ras