A5036324065- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Nonlinear Photonic Systems
- Quantum optics and atomic interactions
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Phase-change materials and chalcogenides
- Nonlinear Optical Materials Studies
- Geochemistry and Geochronology of Asian Mineral Deposits
- Optical Coherence Tomography Applications
- Liquid Crystal Research Advancements
- Advanced Optical Network Technologies
- Digital Holography and Microscopy
Shizuoka University
2016-2025
Mineral Resources
2014-2025
Golmud People's Hospital
2024
Southwest University
2023
Xinjiang Medical University
2022
Powerchina Huadong Engineering Corporation (China)
2022
PowerChina (China)
2022
Northwestern University
2000-2021
McCormick (United States)
2021
Cixian People's Hospital
2020
Eros is a very elongated (34 kilometers by 11 kilometers) asteroid, most of the surface which saturated with craters smaller than 1 kilometer in diameter. The largest crater 5.5 across, but there 10-kilometer saddle-like depression attributes large degraded crater. Surface lineations, both grooves and ridges, are prominent on Eros; some probably exploit planes weakness produced collisions and/or its parent body. Ejecta blocks (30 to 100 meters across) abundant not uniformly distributed over...
On 25 October 2000, the Near Earth Asteroid Rendevous (NEAR)-Shoemaker spacecraft executed a low-altitude flyover of asteroid 433 Eros, making it possible to image surface at resolution about 1 meter per pixel. The images reveal an evolved distinguished by abundance ejecta blocks, dearth small craters, and smooth material infilling some topographic lows. subdued appearance craters different diameters variety blocks degrees their burial suggest that from several impact events blanketed region...
A power-interrogated sensor which allows for simultaneous measurement of temperature and torsion is proposed experimentally demonstrated, based on utilization paired helical long-period fiber gratings (HLPG) with opposite helicities. Unlike most the previous grating-based sensing system, here HLPGs are simultaneously used as both interrogating elements thus bulk high-cost wavelength-interrogating device can be eliminated. Moreover not only but also direction determined simultaneously. The...
A new kind of helical long-period grating (HLPG) written by using a CO2 laser is proposed and experimentally demonstrated, in which sapphire tube (to be used as miniature oven with constant temperature inside) specially utilized place the commonly ZnSe focused-lens. The method allows fabrication HLPG thinned fiber diameter smaller than several tens micrometers. As an application this HLPG, unique sensor that for temperature-insensitive measurement refractive index based on utilization two...
An all-fiber orbital angular momentum (OAM) generator enabling direct turning of the fundamental mode (${{\rm HE}_{11}}$HE11) to second OAM modes (${ l} = {\pm 2}$l=±2) with an efficiency $\sim90\% $∼90% has been proposed and experimentally demonstrated, which is realized based on utilization a second-order helical fiber grating written in few-mode fiber. This first time, best our knowledge, that achieved using only one component, i.e., long-period grating. The method opens new way...
An all-fiber orbital angular momentum (OAM) mode generator enabling simultaneous generation of the second- and third-order OAM modes with conversion efficiencies larger than 95% has been proposed experimentally demonstrated, which is realized by using a high-order helical long-period fiber grating (HLPG) written in thinned four-mode fiber. This first time, to best our knowledge, that two such have simultaneously obtained at wavelengths ranging from 1450 1620 nm only one component, i.e.,...
By employing the surface and bulk micro-electro-mechanical system (MEMS) techniques, we design demonstrate a simple miniature optical Fabry-Perot interferometric pressure sensor, where loaded is gauged by measuring spectrum shift of reflected signal. From simulation results based on multiple cavities interference model, find that response range sensitivity this sensor can be simply altered adjusting size sensing area. The experimental show high linear in 0.2-1.0 Mpa reasonable 10.07 nm/MPa...
In this paper, we review our recent developments in the design and fabrication techniques for high-channel-count fiber Bragg gratings (FBGs). We have presented a theory phase-only sampled FBG demonstrated that of N channels would require radicN/etamiddot times higher maximum reflective index modulation than single-channel FBG. experimentally demonstrate 45- 81-channel linearly chirped nearly whole C-band dispersion compensation, which is fabricated with novel diffraction precompensated phase...
A novel fiber sensor, which enables us to simultaneously measure the torsion, strain, and temperature, is proposed experimentally demonstrated, based on utilization of two successively cascaded helical long-period gratings (TSC-HLPGs). By using approach, crosstalk effects among torsion can totally be discriminated for first time best our knowledge. Moreover, not only angle, but also direction determined simultaneously. Accuracies resolved angle are estimated ~0.8 °C within range 20 °C-100...
In this study, a nano-displacement measurement system is proposed and demonstrated both theoretically experimentally, which was based on modified Mach-Zehnder (M-Z) interferometer using two conjugated orbital angular momentum (OAM) beams. contrast to the previous M-Z-based OAM interferometer, reflection module inserted into reference arm instead of simple mirror. As result, effect transverse position-dependence phase-shift caused by dove prism can be clearly eliminated stable robust...
Binary and multilevel phase-only sampling functions are proposed for the sampled fiber Bragg gratings (FBGs) with high channel count, which require significantly less refractive-index modulation than that does grating amplitude sampling. The design using new simulated quenching optimization temperature rescaling results in uniformity minimum energy out-of-band channels. technique can be applied to FBGs very count. A five-channel nonlinearly chirped FBG tunable chromatic dispersion...
Chromatic dispersion management and tunable compensation are essential features of 40-Gb/s wavelength-division-multiplexed (WDM) systems. In this paper, we demonstrate both single multi channel using nonlinearly chirped FBGs (NC-FBGs). For compensation, show that the NC-FBG can be tuned over a moderate range (/spl sim/400 ps/nm) with tolerable third-order (<200 ps/nm/sup 2/) within channel's data bandwidth (intrachannel dispersion). multichannel systems, 4/spl times/40-Gb/s sampled NC-FBGs...
We propose and demonstrate a novel method to produce flat-top band-rejection filter, which is realized by successively cascading two helical long-period fiber gratings (HLPG) with opposite helicities. Unlike most of the other LPG-based filters obtained date, proposed HLPGs have no complex apodization in grating's amplitude, only relatively shorter length (less than 4.6 cm) needed, thus making this kind easily particularly suitable be fabricated using CO2 laser technique. As an example,...
A miniature temperature-independent curvature sensor was proposed and prepared by using a phase-shifted long-period fiber grating (LPG) fabricated from deeply tapered conventional single-mode fibers (SMFs). As typical example, made (PS-DTLPG) with length of 3.4 mm maximum sensitivity 12.05 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−1</sup> successfully demonstrated. The is has features high sensitivity, reliability, size, low cost,...
Fiber Bragg gratings with phase-only superstructure ("sampling") are shown to greatly increase the reflectivity of large channel count designs. Grating fabrication is facilitated by standard mask side-writing technique, where entire sampling pattern included in phase mask. A novel design based on binary Dammann as well continuous functions demonstrated and exhibits excellent channel-to-channel uniformity.
We propose a novel method for the implementation of tunable multi-channel notch filter based on thermally induced phase-shift phase-only sampled fiber Bragg grating (FBG). The proposed is numerically and experimentally demonstrated. A 51-channel with bandwidth (FWHM) 0.026 nm tuning range 0.6 has been achieved. This technique offers potential applications to multiwavelength laser all optical logic devices.
In this study, a broadband flat-top second-order orbital angular momentum mode (OAM) converter is proposed and demonstrated using phase-modulated helical long-period fiber grating (HLPG). The HLPG designed to be inscribed in thinned four-mode operated at wavelengths near the dispersion turning point (DTP). contrast most of HLPG-based OAM generators reported date, where high-order have rarely been achieved simultaneously, OAM(OAM-2) with bandwidth 113 nm @ -20 dB (ranging from 1530—1643 nm)...
Orbital-angular-momentum (OAM) beams-based interferometers have recently been attracted significant interest and found various applications in the field of optical precision measurement. Whereas all-fiber OAM featured with superior characteristics compact size, low cost, extremely-low insertion-loss, inherent compatibility other fiber devices, less studied especially demonstrated experiment. In this study, we proposed experimentally an interferometer, where two conjugated beams generated by...
A polarization-independent dual-peak narrow-band filter is proposed and demonstrated theoretically experimentally, which realized by using a helical long-period fiber grating (HLPG) but with period small down to tens of micrometers. Unlike those excessively tilted gratings (Ex-TFGs) or the conventional (LPGs) micrometers where generated pairs (DPPs) are all strong polarization-dependence, DPPs obtained in this study polarization-independent, first time, best our knowledge, that underlying...
Abstract Orbital‐angular‐momentum (OAM) beams‐based interferometer has been found various applications in high‐precision metrology. However, most of its reported to date are limited 1D ones, and the simultaneous measurements for multidimensional displacement have rarely explored. Here an angular momentum superposition is first proposed demonstrated, which phases‐changes induced by rotational linear displacements, independently carried (SOAMS) beam containing different spin orbital momenta,...