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  1. Phase retrieval for hard X-ray computed tomography of samples with hybrid compositions

  2. X-ray tomography of samples containing both weakly and strongly absorbing materials are necessary in material and biomedical imaging. Extending the validity of the phase-attenuation duality (PAD) method, the propagation-based phase-contrast computed

  3. 所属分类：其它

    • 发布日期：2021-02-06
    • 文件大小：601088
    • 提供者：weixin_38599518

  1. Exact investigation of the electronic structure and the linear and nonlinear optical properties of conical quantum dots

  2. Intersubband linear and third-order nonlinear optical properties of conical quantum dots with infinite barrier potential are studied. The electronic structure of conical quantum dots through effective mass approximation is determined analytically. Li

  3. 所属分类：其它

    • 发布日期：2021-02-06
    • 文件大小：360448
    • 提供者：weixin_38747818

  1. He-Ne激光穴位照射治疗面神经麻痹

  2. 46 cases of facial paralysis were treated by He-Ne laser light irradiation of acupuncture points with notable curative effects: a curative rate up to 97.83% and an effective rate of 100%.

  3. 所属分类：其它

    • 发布日期：2021-02-06
    • 文件大小：1006592
    • 提供者：weixin_38524472

  1. Multi-spot focusing by using composite spiral zone plates

  2. We present a flexible, simple, and cost effective approach for generating high-quality multiple focal spots in the far field using composite spiral zone plates (SZPs), which serve as a synthesis of two SZPs with different topological charges. By chan

  3. 所属分类：其它

    • 发布日期：2021-02-06
    • 文件大小：1048576
    • 提供者：weixin_38646634

  1. Novel methods for the simulation of impairments in optical network

  2. 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 the proposed method

  3. 所属分类：其它

    • 发布日期：2021-02-06
    • 文件大小：621568
    • 提供者：weixin_38657139

  1. Wavelength-Dependent Transient Characteristics Caused by Gain Saturation in Highly Nonlinear Fiber-Based Raman Amplifier

  2. We have investigated the transient characteristics of discrete Raman Amplifiers and found that the response time caused by gain saturation is dependent upon the wavelength, which corresponds to the effective length of the pump light.

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：908288
    • 提供者：weixin_38698539

  1. Ring microfiber coupler erbium-doped fiber laser analysis

  2. A non-adiabatic microfiber coupler is fabricated by flame brushing technique and then theoretically and experimentally analyzed. The effective length of the microfiber coupler is determined by simulation, and a low-noise laser is demonstrated using v

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：540672
    • 提供者：weixin_38668754

  1. A three-spectrum method for accurate calibration of bi-plate zero-order retarder

  2. A new spectroscopic method is proposed for the characterization of optical zero-order retarders. It is demonstrated that the retardance as well as the variation of the effective fast axis of a bi-plate zero-order quarter retarder (633 nm) can be obta

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：160768
    • 提供者：weixin_38749305

  1. Experimental study of unidirectional excitation of SPPs by binary area-coded nanohole arrays

  2. We present an experimental study on a unidirectional surface plasmon polariton (SPP) launcher based on a compact binary area-coded nanohole array, where the symmetry breaking is realized via effective-index modulation in the binary pattern of the gol

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：1048576
    • 提供者：weixin_38674050

  1. Large mode area and nearly zero flattened dispersion photonic crystal fiber by diminishing the pitch of the innermost ai

  2. In this study, we propose that by diminishing only the pitch of the innermost air-holes-ring of a HF1 photonic crystal fiber, both an effective mode area up to 100 μm2 at 1.55 μm wavelength and nearly zero dispersion of 0.2 ± 1 ps/(km·nm) within a sp

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：626688
    • 提供者：weixin_38725137

  1. Tunable frequency upconversion based on a directly modulated DFB-LD and FP-LD injection

  2. We show a simple, convenient, and cost-effective scheme for tunable frequency upconversion at millimeter-wave band without a local oscillator. By launching a 2.5-Gb/s directly modulated baseband signal into a Fabry–Pérot laser diode (FP-LD), the mode

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：488448
    • 提供者：weixin_38652147

  1. Laser-induced damage tests based on a marker-based watershed algorithm with gray control

  2. An effective damage test method based on a marker-based watershed algorithm with gray control (MWGC) is proposed to study the properties of damage induced by near-field laser irradiation for large-aperture laser facilities. Damage tests were performe

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：770048
    • 提供者：weixin_38658085

  1. Perovskite-based low-cost and high-efficiency hybrid halide solar cells

  2. A cost-effective and high-throughput material named perovskite has proven to be capable of converting 15.9% of the solar energy to electricity, compared to an efficiency of 3.8% that was obtained only four years ago. It has already outperformed most

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：898048
    • 提供者：weixin_38664612

  1. Energy enhancement in mode-locked fiber lasers by using multiple nonlinear optical fiber loop mirrors

  2. We propose a method of cascading multiple nonlinear optical loop mirrors (NOLMs) in the laser cavity to enhance the single pulse energy in mode-locked fiber lasers. A geometrical descr iption is used to engineer the transmittance curve of the effecti

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：1048576
    • 提供者：weixin_38605801

  1. Spectral technique for measuring phase retardation of a wave plate

  2. We present a technique and algorithm for measuring the phase retardation of a wave plate based on spectral transmission curve. Through accurately extracting the intersection points' wavelengths from the spectral transmission curve, the effective phas

  3. 所属分类：其它

    • 发布日期：2021-02-05
    • 文件大小：1048576
    • 提供者：weixin_38636763

  1. Carrier phase estimation scheme for faster-than-Nyquist optical coherent communication systems

  2. We propose a modified-Viterbi and Viterbi phase estimation (VVPE) carrier phase recovery scheme that shows an effective capability of reducing the frequent and accumulated cycle slips induced by inter-symbol interference (ISI) in a faster-than-Nyquis

  3. 所属分类：其它

    • 发布日期：2021-02-04
    • 文件大小：1048576
    • 提供者：weixin_38610513

  1. Mode selective coupler for optical vortices generation (Invited Paper)

  2. In this Letter, an effective method using a mode selective coupler (MSC), which is composed of a three-core fiber is presented to generate optical vortices (OVs). The conversions of OVs with different topological charges, 0→±1 and 0→±3, are simulated

  3. 所属分类：其它

    • 发布日期：2021-02-04
    • 文件大小：747520
    • 提供者：weixin_38709139

  1. Multipoint fiber-optic laser–ultrasound generation along a fiber based on the core-offset splicing of fibers

  2. Fiber-optic laser–ultrasound generation is being used in an increasing number of applications, including medical diagnosis, material characterization, and structural health monitoring. However, most currently used fiber-optic ultrasonic transducers a

  3. 所属分类：其它

    • 发布日期：2021-02-04
    • 文件大小：1048576
    • 提供者：weixin_38660327

  1. Large-range displacement measurement using sinusoidal phase-modulating laser diode interferometer

  2. A signal processing method of realizing a large-range displacement measurement in a sinusoidal phase-modulating laser diode interferometer is proposed. The method of obtaining the dynamic value of the effective sinusoidal phase-modulating depth is de

  3. 所属分类：其它

    • 发布日期：2021-02-04
    • 文件大小：875520
    • 提供者：weixin_38610573

  1. Minimizing the effects of unmodulated light and uneven intensity profile on the holographic images reconstructed by pixe

  2. A simple and effective approach is proposed to minimize the effect of unmodulated light and uneven intensity caused by the pixelated structure of the spatial light modulator in a holographic display. A more uniform image is produced by purposely shif

  3. 所属分类：其它

    • 发布日期：2021-02-04
    • 文件大小：476160
    • 提供者：weixin_38640242
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