980 nm and 830 nm semiconductor lasers were used as the pump source to excite Bismuth/Erbium co-doped optical fiber respectively, and the amplified spontaneous emission spectrum properties of forward and backward pump methods were

A highly birefringent photonic crystal fiber was proposed based on lattice structure of elliptic layer. Properties such as birefringence, confinement loss, and mode area of the proposed photonic crystal fiber were simulated by the

Simultaneous measurement of refractive index and temperature based on an optical fiber cavity sensor was demonstrated, which is a reflective and multi-beam interference based sensor. The sensor head is made up of a normal single m

The spectral characteristics of the single layer optical fiber Bragg grating was analyzed in detail based on single mode effective refractive index of micro-nano optical fiber dispersion equation and the resonance equation of the

The theory and method for generating partially coherent beam based on liquid-crystal spatial light modulator were given. The method was optimized by using partition convolution, the generation of partially coherent beam was parall

Phase-shift method based on domain analysis is not suitable for measuring step-changed object and always causes the accumulation of phase errors .Symmetric and asymmetric dual stair phase structure light coding methods for absolut

Based on the relationship between infinite points and camera intrinsic parameters, a calibration method for camera intrinsic parameters and image distortion was proposed, which can realize a decoupled calibration among intrinsic p

A precision measuring system for tube support plate of steam generator was built, and a parameter measurement method based on edge restriction condition was proposed. Firstly, two-dimensional discrete points were obtained by image

A contrast test measurement system of minimum resolvable was built. For the low illumination MTV-1881-EX CCD and the super low illumination NOCTURN XL CMOS imaging system, the minimum resolvable contrast was measured and discussed

A random fiber laser with stimulated Brillouin scattering (SBS) and erbium-doped fiber (EDF) as hybrid gains was proposed and experimently investigated. Two spools of 20 km long single-mode fibers were used to form a full-open cav

The expansion and contraction of cavitation bubble in liquids with different ambient pressure were investigated experimentally, which are compared with the analyses based on Rayleigh-Plesset equation. In the experimental study, ca

In order to measure the laser induced damage threshold to film quickly, accurately, and quantitatively, the measurement system of flattop laser induced damage threshold to film was designed. The principle and method of damage thre

The collision relaxation of reaction products ground state to the excited state HF molecules is the key reason to reduce the non-chain pulsed HF laser energy. To solve this problem, the possibility of 3A type molecular sieve to el

Aiming at design difficulty of small volume and light weight for small caliber ammunition with pulsed laser circumferential detection system, on the basis of comprehensive analysis of pulsed laser circumferential detection system,

Based on the Stokes, the changes of the polarized light transmission characteristics were studied after the lasers of different incident polarizations transmit through the different concentrations of oil mist by measuring the degr

In order to solve the problem of the thermal effect of the laser gain media, a configuration named “immersed thin-disk oscillator”solid laser cooled directly with flow was proposed. Under the repeated pumping frequency of 10Hz，a m

A dual-wavelength tunable spacing all fiber thulium-doped laser is reported and demonstrated.The conventional ring cavity is used in this fiber laser, 1 565 nm pump source can achieve maximum output power 33 dBm, and a segment of

Using 940 nm diode laser as pumping source, a passively Q-switched Yb:YAG thin disk laser by Cr4+:YAG was realized. The Yb:YAG disk with 500 μm thickness was employed，the Yb3+ atom fraction is 10%.The distribution of temperature i

A method based on the iterative inversion estimation of transport mean free path and the minimum source-detector distance determination was proposed. The method utilizes the idea of iterative estimation and adaptively changes the

As a single photon state, the correlated photon is often applied to quantum communication and optics metrology domain. The study of the spectral radiation and intensity distribution of the photon has a great significance for the b

In order to explore the properties of photoniccrystals, the finite element method was introduced to calculate the band structure of lossy and dispersive photonic crystals with triangular lattice. By using this method, the calculat

Based on the aberration theory of plane symmetric optical systems, the expressions of each type of wave aberration of fisheye lens were formulated. The autocorrelation integral was used to calculate the modulation transfer functio

Integral imaging 3D display has a small field of view range, and the stray light between the microlens will cause degradation of reconstructed images. In view of these problems, this paper presents a pinhole/ microlens array struc

Considering a coupled cavity system composed of two sub-systems, which are constituted by the cavity modes and qubits. Combing the quantum theory and numerical calculation, the amount was described to transfer message and the unce

Two different measures of entanglement, concurrence and negativity, were used to study the evolution of the two Jaynes-Cummings atoms and the transfer of the entanglement between the subsystems. The effect of the initial entanglem

The fidelity in a system composed of a moving two-level atom interacting with an intermediate number-phase state was studied by means of the fully quantum theory. The influences of the atomic initial state, the largest number of p

In this paper, a semi-supervised learning method called semi-supervised sparse multi-manifold embedding (S3MME) was proposed for the classification of hyperspectral image. S3 MME exploits both labeled and unlabeled samples to adap

In order to satisfy the needs of testing the performance of the low-light level night vision device indoor, the spectrums of sunny sky full moon and clear night sky stars were simulated. First of all, the spectral range of low-lig

To solve the problem that the overall and local characteristics of the curves of spectrum are difficultly described by the Gaussian radial basis function and the spectral similarity measurement kernel simultaneously in a hyperspec