A fundamental theoretical investigation of laser ignition is reported. Ignition is happened in an explosion bomb which equipped with visualization windows and all aspects of the phenomenon such as plasmas, shock waves, ignition ke

By using a feedback-stabilized fiber Mach-Zehnder interferometer (MZI) with a PZT-based phase shifter, a novel method for measurement of laser coherence length is demonstrated based on pulses interference. Experimental results sho

We theoretically investigate quantum transport of a two-component quantum gas in a disordered potential and predict a unique disorder-induced splitting of a matter wavepacket. We also demonstrate that the splitting of the mobile c

The angular emission spectra of the distributed feedback (DFB) cavity are investigated theoretically and experimentally. An angular emission model of the relationship between the DFB cavity and its angular emission spectra is prop

The effect of optical phase modulation instability on the scale factor (SF) in Sagnac interferometer-type optic-fiber current sensor (OCS) is theoretically analyzed in this letter. The inherent temperature dependence of the optica

A wavefront reconstruction algorithm based on sub-aperture stitching is proposed to reconstruct a phase from its phase differences to improve calculation efficiency. The proposed algorithm is similar to the sub-aperture stitching

Carrier-envelope phase effect of the monochromatic high frequency pulse generation from Thomson backscattering is investigated with an analytical model and verified by one dimensional particle in cell simulations. We show that the

Periodic nanostructures spaced by half of the wavelength can be obtained by the technology of laser-focused atomic deposition. Experimental result with single standing wave layer is presented, with a periodicity of 213 ± 0.1 nm, a

The phase aberrations caused by thermal deformations is one of the main limitations in a beam control system. If left uncorrected, it would significantly reduce the effectiveness of high-power lasers as devices for beaming power o

To resolve the variability of the intensity distribution and the divergence of the laser diode (LD) output beam in a beam shaping system, a diffractive optical element (DOE) array is proposed in LD beam shaping. This DOE array can

A laser micromachining technique for the fabrication of metallic microstructures is proposed. The fabrication of microstructures is done by laser-induced wet etching that adopts an optical fiber as a machining tool. The laser beam

Laser shock processing (LSP) is an innovative surface treatment technique with high peak power, short pulse, and cold hardening for strengthening metal materials. This process induces intensive plastic deformation and deeper compr

We present a wave-front sensor-less adaptive optics (AO) system for a Nd:YAG Zigzag slab amplifier. A 39-element rectangular piezoelectric deformable mirror in combination with a stochastic parallel gradient descent (SPGD) algorit

We demonstrate a passively Q-switched Tm-doped fiber laser with carbon nantubes (CNTs), yielding a maximum output average power of around 82 mW and the corresponding pulse energy of 1.2 \mu J. The laser operates at ~1.985 \mu m wi

5 at.-% Yb3+ doped (La0.10Y0.90)2O3 transparent ceramics are fabricated by using commercial nanopowders in H2 atmosphere. Effect of the heat-treatment on the structure, spectral properties of (Yb0.05La0.10Y0.85)2O3 transparent cer

A method with a simple configuration is demonstrated to narrow the spectrum line-width of the fiber lasers. The configuration consists of one coupler and four fiber Bragg gratings (FBGs). The number of longitudinal modes is decrea

Nd0.02Y1.78La0.2O3 transparent ceramic is fabricated by conventional ceramic sintering process. The transparent ceramic has excellent spectroscopic properties, with the absorption cross section of 1.53×10-20 cm2 and broad full wid

In order to meet high pulse laser output, the laser shock power supply based on insulated gate bipolar transistor (IGBT) inverter technology, constant current-constant voltage charger mode, high voltage pulse spark, and high pulse

A comprehensive physical model describing the dependence of the steering performances on the various physical parameters of a liquid crystal optical phased array (LCOPA) is proposed. Then several typical factors affecting the stee

Dual beam deflection models based on one dimensional liquid crystal optical phased array (LCOPA) are discussed and compared in this letter. The far-field diffraction performance of the models is influenced by various impact factor

A subwavelength plasmonic waveguide filter with symmetric grating distribution is proposed by using the metal-insulator-metal (MIM) structure. By cascading two gratings with different widths in a period, we can increase the number

Polarization-shift keying (PolSK), which is performed based on two orthogonal polarization states, is investigated in detail by experimental and numerical simulation for data rates of 10 and 40 Gb/s. Using a general Mach-Zehnder i

The 10-Gb/s non-return-to-zero (NRZ) on-off-keying (OOK) data transmission over a 100-km transmission fiber link employing an all fiber 1.55-\mu m single longitudinal mode (SLM) distributed Bragg reflector (DBR) fiber laser as the

A new approach for an all-fiber coherent beam combining by active phasing a fiber combiner is presented, and effect of fill factor of the fiber combiner on the all-fiber coherent combining is also numerical analyzed. Experimental

Harmonic imbalance and phase deviation affect the linearity and sensitivity of fiber-optic current sensor (FOCS). The effects of these two factors are theoretically analyzed. Both the harmonic imbalance and phase deviation must be

A fiber-based precision synchronization triggering system using fiber pulse stacker combined with high-speed electronics processing technology is presented. The relative timing jitter between two laser pulses achieved with this sy

To solve the problem of calibrating the polarimeter module, we design a vector projection (VP) method which is based on the theorem of vector projection and the principle of calibration. The calibration matrix can be calculated by

The practical and effective methods to implement the impairments in optical network are put forward and applied in testing the equipment reliability and transmission quality under the condition of bit errors. The results show that

Low-density parity-check (LDPC) codes combined with polarization scramblers are used to mitigate polarization mode dispersion (PMD) in 40-Gb/s optical fiber system. The simulations are performed to compare the correction performan

A novel hollow core photonic crystal fiber (HCPCF) temperature sensor that is based on intensity modulation and metal-organic-coordinated Co-cage supramolecular material filled in the air holes of the fiber is introduced. Temperat

Photon scattering from a strongly driven many-particle system is investigated. The second-order correlation function for light emitted from a strongly and near-resonantly driven dilute cloud of atoms is discussed. It is shown that

We propose a novel scheme for trapping ultracold rubidium and ytterbium atoms in a three-dimensional (3D) optical lattice simultaneously, in which the two species of atoms locate on two staggered lattices with the same spatial per

A combination of transmission electron microscopy (TEM) and laser-assisted three-dimensional atom probe (3DAP) is employed to study the nanostructure of Dy-doped CeO2, which is a promising ionic conductor. Segregation of Dy atoms

Introducing the finite difference time domain method and perfect match layer absorbing boundary condition, the electro-tunable localized modes in two-dimensional (2D) nematic-liquid-crystal photonic crystal with a point defect (1P

The self-assembled type-II GaSb quantum dots (QDs) are successfully grown on semi-insulting GaAs (100) matrix by liquid phase epitaxy technique. The topography of QDs with high growth temperature is characterized by atomic force m

The effects of Nd3+ concentration on the visible fluorescence spectroscopic properties of Nd:(Y0.9La0.1)2O3 transparent ceramics are investigated. Under 270 nm excitation, three emission peaks are observed at 396, 426, and 633 nm.

The influence of technique parameters on the temperature coefficient of resistance (TCR) of reduced graphene oxide (RGO) films is studied. These technique parameters include the ultrasonic time, solution concentration, and heat tr

An athermal design for Solc-type filter based on periodically poled KTP (PPKTP) is proposed. The athermal static phase retardation (ASPR) direction in KTP along which the quasi-phase-matched (QPM) condition is insensitive to the t

The initial carrier-envelope phase dependence of dynamic process for an ultrashort laser pulse propagating non-resonantly in para-nitroaniline (pNA) molecule medium is investigated theoretically, by solving the full Maxwell-Bloch

Frequency doubled diode oscillator and fiber amplifier (DOFA) is frequency-stabilized to a hyperfine line of molecular iodine for calcium spectroscopy. The frequency doubling of DOFA is demonstrated using an Mg-doped periodically

High quality z-cut LiNbO3 nonlinear photonic crystals with two-dimensional (2D) dodecagonal and fractal superlattices are successfully fabricated by applying the high voltage pulses. By collinear quasi-phase matching technique, se

The issue of the letter is focused on the RB-SiC aspherical mirror high frequency surface quality which is fabricated with the different type fixed abrasive pellets. The two-dimensional (2D) surface roughness of the mirror is simu

A new approach is proposed to extract the rectangular building footprints from single high-resolution synthetic aperture radar (SAR) image by combining region-based information with edge-based information. We build multiscale auto

A modified method of image denoising based on multi-scale mathematical morphology is proposed to be used in the earthquake ruin scene. A new morphological arithmetic operator is desiged according to the basic operations in the mat

We establish an accurate and prompt intraoperative sentinel lymph node (SLN) diagnostic system using in laparoscopy for gastric cancer. The system consists of a near infrared (NIR) laser, a near infrared camera, a spectroscope, tw

The resolution of astronomical imaging from large optical telescopes is usually limited by the blurring effects of refractive index fluctuations in the Earth’s atmosphere. In this letter, we develop a lucky imaging system to resto

This letter presents a correlation tracking algorithm based on edge detection, in allusion to the phenomenon that the target is susceptible to interference in long-wave infrared image. Firstly, the collected imageis processed by m

The optical characteristics of the magnetic metamaterial (MM) composed of the ferrite rods are theoretically investigated. Firstly, a photonic band-gap (PBG) resulting from the magnetic surface plasmon (MSP) resonance is recognize

Through finding the derivatives of the group delay and transmittance of the coupled double-ring resonators (CDRRs) with respect to different structure parameters, the dispersion and filtering characteristics of CDRRs varying with

Modal filtering in nulling interferometer is based on the capability of single-mode waveguides to transmit only one complex amplitude function to eliminate virtually any perturbation of the interfering wavefronts. In this letter,

A novel inorganic-organic hybrid polymer polysiloxane-liquid (PSQ-L) is introduced for defining waveguides. The PSQ-L polymer film shows good optical properties and high thermal stability. The all polymer microring resonator is fa

In order to achieve the goal of the autonomous landing of fixed-wing unmanned aerial vehicles (UAVs), a new method is put forward for using the monocular camera on board to provide the information, which is need for landing. It is

Terahertz wave detecting method based on multi-reflection optical lever with nano-scale displacement measuring precision is presented. Multi-reflection optical lever is composed of a pair of plane micro-mirrors, and detecting mate

A novel microring resonator sensor coated with a single negative metamaterial (SNM) layer is proposed. The dispersion relation of hollow cylindrical dielectric waveguide covered with a SNM layer is derived, and resonant frequencie

We present a downhole seismic monitoring system and the field test results using a fiber laser seismometer (FLS). The distributed feedback fiber laser is used as the sensing element of the seismometer. Using the interferometric de

A novel method to measure droplet size and complex refractive index simultaneously by rainbow detecting is presented. A new mathematic model for rainbow pattern of absorbing droplet is built. Based on this model, a series of new f

According to the X-ray fluorescence (XRF) spectral characteristics of heavy metals in soil, the application of XRF spectra de-noising using biorthogonal wavelet packet transform technology is analyzed. Wavelet pack decomposition a

We present a numerical study on the evolution of the intense femtosecond pulse propagation in argon by solving the extended nonlinear Schr¨odinger equation which includes the beam diffraction, group velocity dispersion, self focus

The optical data which collected in situ in inshore and offshore of Daya Bay in July 26, 2 010 is presented. The data is collected by using the instrument, which synchronously measured the volume scattering function in seven direc

Thermal atomic layer deposited (ALD) Al2O3 films are applied at the front and rear sides of PERC-type c-Si solar cells. At the front side, Al2O3/SiNx as a double-layer antireflection coating reduces the reflection loss, and at the

Wired local network is used widely in a vehicle. It brings the benefits of sharing information and controlling automatically as well as causes negative reaction and a troublesome problem to vehicle such as weight, cost, electromag