in micro-electro-mechanical systems (MEMSs) because of their non-contact, whole-field, remote-sensing and high-resolution characteristics. Microscope has been widely employed to measure micro engineering objects. Scanning white-light interferometer (SWLI) is a fast and high vertical resolution instrument to measure three-dimensional (3D) shape of engineering objects of high aspect ratio. In the past, Mirau SWLI was popularly adopted in microscopic systems due to its modularized objective lens. Since a Linnik SWLI does not need any optical components in front of the objective lens, higher numerical aperture can then be achieved. In addition, Linnik SWLI has higher lateral resolution than that of Mirau SWLI.

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Polarization-independent liquid crystal lens arrays fabricated with self-aligned dual hole-patterned electrodes is demonstrated. A middle glass substrate with self-aligned hole-patterned electrodes on both surfaces combines two other glass substrates to form a composite lens array composed of two orthogonal homogeneous liquid crystal cells. The fabricated LC lens arrays show electro-optical features of tunable focuses and polarization-independence.

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By combining the multiphoton excitation mechanism and temporal focusing technique, temporal focusing multiphoton microscopy has widefield optical sectioning ability and already demonstrates the potential for widely applications. However, temporal profile distortions reduce excitation efficiency and degrade image quality. In order to compensate the distortions, a wavefront sensorless adaptive optics system (AOS) was integrated. With the AOS correction, not only the axial excitation symmetrically is refocused, but the axial resolution with two-photon excited fluorescence (TPEF) intensity is also maintained.

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In this study, we optimize the planar micro-optic concentrator by the optical simulation. The half acceptance angle of the planar micro-optic concentrator with a 300X concentration is 0.115 degrees and 0.275 degrees, and the optical efficiency is 81.23% and 71.92%, respectively.

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In this paper, we propose a free-space plasmonic filter based a 1D I-shaped metallic structure. The I-shaped structure supports three localized surface plasmon resonance modes which locate at the wavelength close to the three primary colors. The three resonance modes present omnidiretional resonance properties due to the localized nature.

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A stereo-endoscope system with the angle of field 60°, which includes a single lens is proposed in this study. This system can simultaneously acquire images with both left and right angle of view, record such image pair on the camera lens, and proceed image post-processing to acquire a stereo image with depth.

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It is expected that white LED will become popular in the future. However, the influence of discomfort glare of LED hasn’t be clarified yet. The aim of this study is to clarify degrees of visual comfort and visual fatigue between polarized LED and unpolarized LED under different experimental conditions.

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We discuss the performances of multi-chip white light LED packages with a proposed green-emitting Ce6Tb0.33MgAl11O19:Ce,Tb (CTMAOCT) phosphor. We find that an appropriate combination of yellow phosphor Y3Al5O12:Ce3+ (YAG:Ce) and green phosphor CTMAOCT can bring the significant effects on angular color uniformity and luminous flux.

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It is proposed that a new pupil lens module ( PLM ) is used for optoelectronic integrated circuits testing. The proposed PLM is with high transmission rate, and which can accomplish the illumination on the tested integrated circuits to be less than 2% in uniformity deviation.

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It is proposed that a new LED light is used for fishing and working on fishing boat.The proposed LED light is witha specially designed secondary lens to achieve therequired asymmetric light intensitydistribution. The fishing/working LED light can accomplish the same illumination distributionas thetraditionallyused discharging lamps on fishing boat, but with much less electrical power.

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This PSBP liquid crystal phase grating is made of hybrid PSBPs with two Kerr constants. Owing to the non-patterned electrode and the optical isotropy of PSBP, the diffraction effect can be switched off when the voltage is absent. The diffraction intensity increases when electrical field induces phase difference in PSBP.

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As the trend of energy saving and carbon reduction, interior lighting design is an important direction to research. The research includes energy saving, environmental friendly, diverse lamp. It helps to create a healthy and comfortable living environment.

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This research is proposed to go proceeding rapid diagnostic of eyes via a 3D ophthalmoscopy with visible and near infrared spectrum. Optical design of this 3D ophthalmoscopy is demonstrated in this experiment.

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We demonstrate a III-VI chalcogenide, polycrystalline gama-In2Se3, which simultaneously possesses the capabilities of thickness-dependent optical gaps and wide-energy-range absorption existed in the polycrystalline layers of gama-In2Se3. The amorphous effect of medium-range order (MRO) renders a structural-phase transition of gama to alpha occurred inside the gama-In2Se3 layer with a heat treatment of about 700 degree C.

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A single-mode Cr-doped crystalline core fiber (SMCDCCF) cladded by high-index glass with gross gain of 2.7 dB and net gain of 0.7 dB at wavelength of 1400 nm is demonstrated for the first time, leading to the possibility of functioning as 300-nm broadband amplifiers.

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We use azobenzene to change the phase of liquid crystal in holographic photopolymer dispersed liquid crystals, and control the transmittance and diffraction efficiency under violet LED (365 nm) and green laser (532 nm) exposure. The tunable range of transmittance and diffraction efficiency is about 50%, and so is diffraction intensity.

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An optical matrix is based on two light bars, which are engraved with microstructures on their surface. In operation, infrared laser incidents into one end of the light guide plate and gradually emits from the surface of light bar. The output beams can be used as the detection beam for an optical matrix.

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In this article, we demonstrate an easy method to fabricate liquid crystal (LC) Fresnel zone lens (FZL). By applying extra electric field, the lens can become electrically switchable. This lens was also made polarization-independent by twisted nematic (TN) alignment and manifested 25.75% diffraction efficiency at the focal point of 26Vpp.

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While standard x-ray diffraction (XRD) and electron diffraction are great techniques to investigate the microstructure, residual strain, phase and texture transformation in a laboratory environment, some research questions demand large scale research facilities especially neutron and synchrotron diffraction experiments. At the beginning of this talk, we will present several scenarios in which neutron diffraction enabled us to solve advanced problems in Ni-Mn-Ga magnetic shape-memory alloy (MSMA) research. The three examples given will be the investigation of the grain orientation and distribution throughout a MSMA foam, the changing martensite modulation within a MSMA single crystal ingot as well as an advanced analysis of twinning in a MSMA sample. Furthermore, we will present cases in which synchrotron diffraction has a great advantage in thin films research over standard XRD, for example in texture transformation and thin film stress analysis. Finally, we will show that the use of complementary characterization methods (small and large scale) will result in the most comprehensive understanding of materials science and engineering questions.

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We study the guided-mode resonance in a silicon photonic crystal slab with background index 1.1. Using the finite-difference time-domain method, we design a near- infrared filter featuring a 3dB-bandwidth of 20 nm at normal incidence.

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Based on the different locations and rotations of the pyramid textures, we study three different gallium-nitride (GaN) based light emitting diode (LED), relationship between light extraction efficiency (LEE) and rotation angle of pyramid texture. Most of the escaped photon flux propagated in the seven escape paths were proposed in the simulation of the LEDs.

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Conventional Shack-Hartmann wavefront sensor always consists of lens array and relay optics. The relay optics would induce additional aberrations into system and increase measurement uncertainties. In this paper, the system without relay optics is constructed. Furthermore, removing the alignment error through analytical method is available because of the simpler system.

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We have successfully used a goniometer system to measure the liquid crystal refractive indices at infrared band via the total internal reflection (TIR) technique. By fitting angular-dependent reflectance curves, the individual extraordinary (ne) and ordinary (no) refractive indices can be accurately measured.

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In this paper, a 100-Gb/s optical transceiver module is designed in accordance with 100GBASE-SR4 standard. Clock and data recovery (CDR) chips are used in the module to improve the performance of input and output signals. The printed circuit board (PCB) and optical engine of the module are also designed.

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We discuss the performances of multi-chip white light LED packages with a proposed green-emitting Ce6Tb0.33MgAl11O19:Ce,Tb (CTMAOCT) phosphor. We find that an appropriate combination of yellow phosphor Y3Al5O12:Ce3+ (YAG:Ce) and green phosphor CTMAOCT can bring the significant improvement on angular color uniformity and luminous flux.

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In this paper, we discuss the performance of the multi-chip white light LED packages with the proposed silicon dioxides (SiO2) structures. Through the research results, it is suggested that the hybrid SiO2 structure with its size around 1µm can be suitable for obtaining higher color uniformity.

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The pressure-dependent Raman phonon behaviors of 6H-SiC bulk material were studied up to 20 GPa with a diamond anvil cell (DAC). The frequencies of LO(Γ) and TO(Γ) Raman modes and LO-TO splitting increases with increasing pressures. The mode-Grüneisen parameters for Raman modes of 6H-SiC are determined experimentally.

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In this paper, we used geometrical optics and dispersion theory to calculate the relation between dispersion angle, rotation angle and vertex angle. We get the formula of dispersion angle; then we use an optical simulation software SPEOS to verify the formula. The results shows that when the vertex angle is 50° and ration angle is +15°, the maximum dispersion angle is 4.803°.

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Recent year, embedded lamp has been used widely in interior lighting. But it has some problem about low light range and low illuminance uniformity. This paper uses turned reflective mirror and LED to improve the problem. We discovery that the light reflecting from turning reflective mirror can increase the wall light illumination area. Results show that the illuminance ratio can be improved by 71.65%.

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In this paper, we design a 12-channel optical transceiver module at 10-Gb/s/ch and its evaluation board (EVB) based on 100GBASE-SR10 with CXP interface. The structure of the module was created through Solidworks, and the printed circuit board layouts of the module and EVB were designed through Altium Designer.

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We proposed the angle deviation method combing with common-path heterodyne interferometry to measure the small displacement within a distance range of 1000μm and 0.1μm resolution.

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an out-plane pie electrode for a liquid crystal lens has been investigated and compared with in-plane pie electrode. The high resistivity material is developed for generating smooth electrical fields over the lens aperture. This study makes several noteworthy characteristics such as low driving voltage and a 2D/3D multi-adjustable lens.

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In this paper, we propose a multi-channel imaging system which combines the principles of insect's compound eyes and optical zoom. The proposed optical system could reduce the total track length of imaging device to achieve miniaturization. The optical zoom is used to adjust distance between two single lenses to change effective focal length of the optical zoom system and multi-channel structure is achieved by a curve microlens array. The zoom ratio of the design is 3x. Focal lengths of the system are 2.08 mm, 4.05 mm and 6.05 mm and total track lengths are 2.756 mm, 4.81 mm and 5.43 mm respectively.

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In the process of subaperture stitching algorithm, each subaperture has to be placed at a corresponding position, but there will be a natural position uncertainty. This paper provides an iterative method to correct the subaperture position and reduce the stitching error in aspheric testing.

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Modeling, experiment, and analysis of the optical sub-assembly (OSA), which are the key factors of the embedded optical time domain reflectometer(OTDR) for the real-time optical fiber monitoring system, were conducted. On comparing between the result of the experiment and the modeling feature of the module, the average matching rate was more than 90 %.

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A novel single-mode square-core-fiber (SMSCF) is proposed and fabricated. 10-Gb/s high speed transmission was demonstrated with negligible power-penalty when compared with standard-single-mode-fiber (SSMF). Owing to higher optical-confinement-factor, SMSCF shows lower bending loss with compared with SSMF.

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In this research, we integrated a novel hydrogen peroxide sensor into heterodyne interferometry to determine the concentration of hydrogen peroxide with measuring the phase variation. The results showed that the precision measurement can be achieved by proposed method.

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An optimization process to control the aberration of a concave grating is developed. The approach has a dramatic reduction in aberration and great improvement in spectral resolution.

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The paper proposed the study of industrial standard measuring technology and methodology for beam size. ISO 11146 is adopted for this study. There are four popular methods, Laser Beam Profile-based system, slit, knife-edge and pinhole scanners, for measuring the beam size in industry.

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We present an ultra-wide 3X zoom lens for a 3 mega mobile camera. We inserted the right-angle prism in front of the lens. This configuration resulted with a horizontal thickness of 6 mm. The zoom lens has an f-number of 2.8 to 5.13 and the field of view is 80°.

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Relative illumination is usually low in wide angle lens. We increase image numerical aperture ratio of the half viewing angle of 80 degree to 0 degree and decrease the chief angle in the image plane to increase the relative illumination. The relative illumination is greater than 83% in this design.

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Originally developed as a classical analogue of quantum OCT, intensity-interferometric spectral-domain (SD) optical coherence tomography (OCT) enables scanless cross-sectional imaging with resolution improvement and dispersion cancellation. In this paper, we demonstrate theoretically and experimentally that such OCT can be realized on the basis of a conventional SD-OCT setup.

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The measurement system includes a control system and a storage system. In control system, one can set parameters to measure two-dimensional spectra. In spectroscopic measuring, the resulting waveform can be zoomed for further analysis. Through these functions, Raman spectra of specimen can be measured in the two-dimensional scanning automatically, and the data can be got quickly and accurately.

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A simple method for fabricating a polarization- independent liquid crystal Fresnel lens (LCFL) is proposed by using the phase grating and Azo-dye photoalignment method. The LCFL was made polarization-independent by radially planar alignment, and it had a diffraction efficiency of ∼ 12% at a low driving voltage of ∼ 3.0 V.

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In this work we demonstrated a photo-stimulated luminescence imaging plate readout system without moving components. The digital micro-mirror device and a silicon photomultiplier module used in this design that made this type of system scaled down to portable scale.

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Abstract—We utilize 3D printing technology for manufacturing a hand-held probe in optical coherence microscopy system. The portable OCM system can provide both axial and lateral resolution better than 1 micron. .

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Mosquitoes are the media of carrying many infectious diseases. 365nm and 395nm UV LEDs are used to attract the mosquitos in the study. It is proposed that a new optomechanical system is used to trap the mosquitos. The proposed system consists of UV LED source and electrical fans, and which is demonstrated to attract and kill mosquitos with high efficiency.

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As polymer optical fibers (POF) become mainstream of short distance communications cable, traditional POF communication standards just allow one wavelength transmission in a single optical fiber. In order to send more message, wavelength division Multiplexing (WDM) is needed. This paper describes how to use the optical simulation software to design WDM system by using concave grating in the structure of Rowland Circle spectrometer.

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In this work, trapping of the micron-sized particles with different refractive index is investigated using the vortex-beam optical tweezers system. The results show that the manipulation of particles of the vortex-beam optical tweezers is significantly affected by the q-value of a q-plate. The smaller the q-value is, the longer distance of the particle can be moved and trapped by the tweezers.

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In this study, highly sensitive total-internal-reflection (TIR) phase-shifting-interferometry for measuring the full-field refractive index of a transparent substance was proposed. High and tunable sensitivity, the proposed approach also provides the advantage of high stability due to it common-path configuration.The resolution of 2.03×10-5 RIU was achievable.

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This study is to investigate the effects of different angle of knife edge for MTF measurement. Analyzing the results and discussed.

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This paper focuses on the effect of LED alignment with a tapered thin LGP (light guide plate), which causes the variation of coupling efficiency. The simulation results with software “Optisworks” shows that the position of LED can be optimized to enhance the efficiency more than 2% and the uniformity can be increased as well.

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The KTP birefringent sensor is proposed for the applications of the optical liquid concentration measurements based on a homodyne interferometer. The experimental results show that it can be used as fluidic optical sensor by prompt flowing cell designs. The measurement resolution of 0.04% is achievable for the flowing salt-mixed water.

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This paper proposes the concept of future semiconductor chip based radio-over-fiber (RoF) system. The microcavity based optical frequency comb for replacing with laser diodes to transmit the data is introduced. Preliminary results and specifications of the microcavity are demonstrated.

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We experimentally investigated the optical and physical properties of different thickness of silver film grown on a silicon substrate. By adjusting the film thickness and annealing temperature, the size of silver nanoparticles can be manipulated. Enhancing these nanoparticles can help to improve the conversion efficiency of solar cells.

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This paper proposes compensation method with liquid lens as field lens in 9x zoom lens intermediate optics. Comparing with original 9x zoom without field lens technology, the maximum the spherical aberration (SA), the tangential coma (TCO), the tangential astigmatism (TAS), the transverse chromatic aberration (TCA) and the petzval surface curvature (PTZ), and modulation transfer function (MTF) improved by 42.8%, 87.5%, 92.5%, 77.8%, 9.06% and 2877%.

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This paper applies the ray tracing method to evaluate the transform function of a lens. An algorithm is developed to demonstrate the simulation of point spread function (PSF). The Modulation transfer function (MTF) is evaluated after the fast Fourier transform (FFT) of the PSF.

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The mounting mechanics is found to be a key issue to dramatically affect the optical performance in optical systems. This investigation indicates that the external stresses will increase the wavefront errors, especially in the terms of astigmatism.

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To enlarge the applicability of digital holography, this research first employs digital holography to detect V and W displacements of a sample simultaneously. The optical setup which contains two objects is placed on the y-z plane, waves and a reference wave, and it takes two holograms before sample deformation.

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This paper proposes a new measurement system. The combination of Linnik microscope interferometer and a particular phase demodulation module.Use single CCD camera can capture four different phase-shifted interograms simultaneously, and using the theory of phase-shifting interferometry (PSI) to obtain interferometric phase, and then calculate the physical property of the test object.

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This study presents an achromatic phase shifter based on an optical delay line. The proposed device is more effective than a conventional phase shifter for complex spectral domain optical coherence tomography to suppress mirror-image terms.

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This thesis developed a set of single-frequency laser interferometer rangefinder, which includes a light source, a Maike Sen interferometer, and a phase demodulation module. Among them, the phase demodulation module includes a quarter-wave plate, a two-dimensional grating, four-quadrant analysis board, and four quadrant sensor. Interference from the interferometer beam after the quarter-wave plate and a two-dimensional grating, is divided into four bundles; After four quadrants which are four-quadrant assay plate, resulting in four phase difference of the interference signal by 90 degrees; After four interference signals received four quadrant sensor sensor, interferometric phase interference of light can be parsed out.

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There are 26 sunlight concentrators to guide the sunlight into the light box. The light box is a hollow rectangular structure. There are 6800 white LEDs arranged around the light box. The 95% reflectivity is applied on the inside surface to make uniform sunlight and white LEDs hybrid light.

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In this article we add two prism arrays in front of single lens camera to produce a stereo image pair and correct chromatic aberration. Finally we use lens optimization to reduce distortion.

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A compact in-situ ellipsometer using liquid crystal retarder can be applied to monitoring the dynamic process. To characterize the accuracy of ellipsometric parameters, we study the system errors induced by the liquid crystal retarder and the theoretical analysis has been demonstrated.

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In this study, the fiber sensor is made of plastic fiber and side-grinded by side-polished system as a sensing area. By using spin coating method, the ultraviolet (UV) gel is coated on sensing area of fiber sensor, and then exposed under ultraviolet light through a grating mask to form a periodic structure of on sensing area. Finally, light intensity measurement system is employed with high-power light-emitting diode (LED) and the fiber sensor to measure the sucrose solution of refractive index. Therefore, the effect of thickness and period of ultraviolet gel film grating on side-polished fiber sensor are analyzed in terms of sensing slope, signal stability, and sensor resolution.

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