We experimentally demonstrate for the first time, to best of our knowledge, an all-fiber passively mode-locked laser operation based on nonlinear multimode interference step-index fiber. Such a structure couples light in and out fiber via single-mode fibers, its physical mechanisms saturable absorption have been analyzed theoretically third-order Kerr effect Using with 48.8 mm length fiber, modulation depth has measured be ∼5%. The output pulses central wavelength 1596.66 nm, bandwidth...

Hollow-core fibers have demonstrated record performance in applications such as high-power pulse delivery, quantum computing, and sensing. However, their routine use is yet to become reality. A major obstacle the ability maintain polarization state of light over a broad range wavelengths, while also ensuring low attenuation single-mode guidance. Here we simulated, fabricated characterized polarization-maintaining anti-resonant hollow-core fiber. The birefringence was achieved by introducing...

We investigate the performance of surface plasmon and Fabry-Perot modes formed between two closely spaced layers. The motivation for this study is twofold: first, to look that may be excited at lower incident angles compared usual Kretschmann configuration with similar or superior refractive index responsivity and, second, develop a simple applicable method these structures over wide range separations without recourse construction ad hoc structures. Using back focal plane observation...

The response of the optical microfiber sensor has a big difference due to slight change in fiber structure, which greatly reduces reliability sensors and limits its practical applications. To avoid nonlinear influences deformation individual differences on sensing performance, backpropagation neural network (BPNN) is proposed for concentration prediction based biconical (BMF) sensors. Microfiber diameter, cone angle, relative intensity are key input parameters detecting chlorophyll-a (from...

The linear brushless doubly-fed machine (LBDFM) as a novel type of has attracted extensive attention in recent years. Due to the complex magnetic fields and end effect, there is rich low-frequency thrust ripple LBDFM. In order make physical process clear, effect on winding magnetomotive force (MMF) studied. Firstly, shifted slot vector affected by obtained. Then, negative sequence motive analyzed with certain configuration. Finally, generation explained. analysis results are verified finite...

For massive multiple-input multiple-output (MIMO) detection, minimum mean square error (MMSE) method can achieve close-to-optimal performance. However, its computational complexity is proportional to the third power of antenna elements due inevitable matrix inversion operation. Especially when number transmitting antennas very large, exact MMSE detection becomes disabled owing excessive complexity. In this paper, an adaptive damped Jacobi (DJ) proposed firstly iteratively realize performance...

This paper presents a design concept and prototype of polyimide-coated Fibre Bragg Grating (FBG) thermal sensor system based on fast scan tunable laser source (up to 1 kHz sensing frequency). was deployed perform comprehensive 2-D real-time radial axial profiling an electromagnetic coil - the short duty cycle electric machine (EM) windings. The measurements were performed using equivalent consisting FBG interrogator, multi-FBG string temperature sensor, power resistors (thermal objects),...

Spatial modulation (SM), a scheme that maps transmitted information onto the antenna parameter, appears as an attractive option for emerging large-scale multiple-input multiple-output (MIMO) systems. Due to reduced inter-channel interference (ICI) and signal processing complexity, SM has attracted vast attention motivate further vigorous research, one of which is Huffman-based SM. To decrease bit error rate (BER) with acceptable overhead complexity power assumption, new combining BCH coding...

A monolithic, chip-based spectrometer based on the novel concept of a series electrically addressable high-Q resonators coupled to ridge waveguide is presented. discrete monolithic InP-based chip has been designed detect wavelengths spanning 10nm range in near-infrared region functioning as sensor. This approach number advantages over traditional spectrometers. As well being solid state and having no moving parts, co-location wavelength dispersion detection offers advantageous spectral...

This paper reviewed the evolution of Passive Optical Network (PON) and discussed viable way implementation next generation optical network, i.e., wavelength-division-multiplexing passive networks (WDM-PON). It also presented designs components for WDM-PON.

This paper presents the optimal simulation and design results for arrayed waveguide gratings (AWGs) devices with channel spacing of 0.4 nm 0.8 nm, which are suitable Dense Wavelength Division Multiplexing (DWDM) Coarse (CWDM) applications.

In this paper, a novel multilayer substrate integrated waveguide (SIW) four-way out-of-phase power divider is proposed. It realized by 3D mode coupling, on substrates. The structure consists of vertical Y-junction, lateral T-junction SIW and Y-junction half-mode SIW. advantages the proposed are its low cost ease fabrication. Also, it can be easily with other planar circuits such as microstrip circuits. An experimental circuit designed fabricated using traditional printed board technology....

This paper presents a design for label free Si photonic wire "lab on chip" arrayed biosensor with 8 sensing and reference channels. It provides an advanced means the detection of target molecules, affinity binding analysis time domain real-time monitoring parallel solutions, gases, or reactions near channel surface. The sensitivity device is at highest level among all other methods, which least 10-100 times more sensitive than that currently commercial available devices instruments....

A Ho³⁺-doped photonic crystal fiber laser with output wavelength of 2077nm has been demonstrated using a 1992nm Tm³⁺-doped as pump source. And the optical- optical conversion slope efficiency is 41.3%. In order to optimize power laser, simple quasi-three level system theoretical modeling developed in condition Stark-splitted energy diagram holmium ion. We obtain 43.5%, which higher than experimental Furthermore, relative deviation η 5%, shows data good agreement...

This dataset contains data supporting the results presented in paper Birefringent Anti-resonant Hollow-core Fiber and supplementary material. It includes used to plot each figure (in .xlsx format), together with simulated obtained using COMSOL. Hollow-core fibres have demonstrated record performance applications such as high-power pulse delivery, quantum computing, sensing. However, their routine use is yet become reality. A major obstacle ability maintain polarisation state of light...

We previously demonstrated light guiding in fiber-on-glass (FOG) dielectric waveguides using fluoro-tellurite glasses. These were fabricated by mechanically pressing a fiber onto polished planar glass substrate of lower refractive index above the transition temperatures. However, two handling constraints have been discovered this approach. In practice, for novel inorganic compound glasses, minimum dimension that can be handled is preferably around 30μm. The difference between and reliably...

We developed a prototype of Fibre Bragg Grating (FBG) thermal sensor system and deployed it in real-time radial profiling electric machine (EM) copper windings. Two EM duty type regimes were simulated using an experimental motorette framework. The tests performed setup consisting FBG interrogator, temperature sensors, frame with embedded windings, power supply. constructed lumped parameter network (LPTN) model the used for analysis measurement compared them results performance validation....

This paper reports a novel wideband two-way power divider with improved out-of-band rejection based on substrate integrated waveguide (SIW) technology. Periodic radial line slots are etched the bottom side of SIW to achieve band-stop characteristic. The band-pass response is achieved by combing characteristic and high-pass SIW. An experimental circuit fabricated traditional printed board measured results show that has advantages (about 42.8% center frequency 7 GHz for Return Loss > 10 dB)...

This paper presents a novel design of "Sensor on Chip" spectrometer, based silicon silica (SOI) material. It employs series micro-ring resonators with varied diameters whose resonance wavelengths evenly space out across the CO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> emission spectrum range. provides resonators-based detection platform for observation Earth's atmospheric levels, as well monitoring air quality related level and car...