Session Index

In this paper, the regular pulses generated by the pure optoelectronic feedback and
the hybrid system are demonstrated and compared in simulation. By applying optical injection
combined with the negative optoelectronics feedback system, the unwanted side peaks of the
regular pulses are effectively suppressed. Moreover, the detailed characteristics of the pulses
generated in different operational parameters are also discussed.

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The optical trapping of gold nanoclusters on a polystyrene bead include by the linear polarized Gaussian beam is studied. The 3D streamline of optical force shows the trapping behaviors on the frontside of the nanostructures. The Brownian-motion disturbance range shows the trapping ability of the stagnation point.

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A neural network pre-distorter without significantly altering the transmitted powers of subcarriers is proposed to eliminate nonlinear distortion in DML-based OFDM transmission. Without nonlinear post-compensation, the data rate is increased by 37.7% after 100-km SMF.

 

Due to the great demand on data transfer, silicon photonics is considered to be a platform to solve the encountered problems. But, Joule heating is serious along component size become miniature. Heat dissipation is an important issue need to be resolved. Because the circuit, electrical components and optoelectronic components are integrated on the Si photonics circuit, the demand for heat dissipation is higher than the previous Si one. The research integrated the heat dissipation module into the silicon photonic coherent transceiver. And, the research measured three cases for placed metal pad and TE cooler.

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We proposed a graphene-based high-contrast grating (HCG) structure by using the surface plasmon polaritons (SPPs) generated from transverse magnetic (TM) polarized emission. The newly-designed HCG comprises a silicon dioxide substrate and a periodic grating that is constructed of alternated layers of silicon and monolayer graphene. The pair of silicon/graphene features a large contrast in refractive index with its surroundings. Moreover, the permittivity of graphene can be modulated by adjusting the Fermi levels to further enhance the contrast.

 

A bound state in the continuum (BIC) is a non-radiative state. It perfectly confines an electromagnetic wave and can exist within a continuous spectrum. We proposed symmetry-protected BICs and Friedrich-Wintgen BICs on the periodic metallic grating to realize zero linewidth and infinite quality factor. Finally, we can change the filling factor to realize the optical cavity of a BIC laser featuring adjustable incident angles.

 

The color of silicon wafers varies with the growth of silicon dioxide with different thicknesses. In this study, we found that the color temperature and CIE color coordinates from a reflected light can be used to determine the thickness of silicon dioxide. At a tilt angle of 30°, for example, the bare wafer showed a color temperature of 5,290K, while 4,190K with a silicon dioxide of 200nm
and 4,990K with 500nm. In terms of CIE color coordinates, the respective coordinates were (0.337,0.345) for the bare wafer, while (0.373,0.372) for that with a silicon dioxide of 200nm and (0.345,0.352) for 500nm.

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In this article, through the polarized optical feedback system (POF) and the traditional optical feedback system (OF), the polarized optical feedback system is based on the traditional optical feedback system by adding an optical polarization system, so that the feedback light is polarized and interacts with the laser itself. The output light form polarized optical feedback system , effectively increasing bandwidth and narrowing the line width.Adjusting appropriate injection strength and delay time, the period one which 3-dB linewidth reduction to about 10-40 kHz are observed in polarized optical feedback system, and chaos states energy is more distributed on each frequency.

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We propose fronthaul link with 7-GHz IM-DD channels and 1/64 Nyquist-sampling-rate ADC to support 64 signals for 100-GHz Ma-MIMO beamforming. The corresponding CPRI-based capacity is 393.6374Gb/s. After fiber and wireless transmission, the EVMs are <8%.

 

In this paper, the regular pulses generated by the pure optoelectronic feedback and the hybrid system are demonstrated and compared experimentally. By applying optical injection combined with the optoelectronics feedback system, the unwanted side peaks of the regular pulses are effectively suppressed. Moreover, the single sideband (SSB) phase noise of the pulses generated is also discussed and compared.

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A main purpose of this system is to improve the operation of the light transmission in the international signal communication. This system with high-brightness, LED, image processing and human-machine interface is to reduce the power consumption on the ship, to achieve remote operation, intelligent track and identification of light signals. There will be no more necessary about signal received and translated operations in signalman during the communication process, thereby improving the shortcomings caused by human factors.



 

We present an avalanche photodetector integrated in ultra-thin Si-padded Si3N4 waveguide structure. This photodetector can monitor waveguide power with very small optical absorption.

 

We use a collimator to measure the radiation power of second order fiber Bragg gratings. The polar plots of the radiation for FBGs show that at wavelength of 1541.06 nm, we obtain a maximum radiated power of -26.6 dBm at the radiation angle of 90°, with a 2.8° beam divergence.

 

We report the simulation of simple-structured one-dimensional (1D) GMR gratings with non-polarizing resonance properties under normal incidence. The TE and TM resonance peaks are at different wavelengths, with a slight difference of 3.3 nm, as seen in the spectra of the GMR grating. After simulate Hfo2-coated with a thickness of 40nm that the grating nearly completely displays the nonpolarizing GMR effect.

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We design two directional couplers, one tapered and one cubically bent. Both couplers are adiabatic and show good robustness to wavelength changes and fabrication errors. We then further evaluate the device performances under different length and verify beam propagation simulations using coupled mode theory.

 

Dispersion relations of surface plasmon polaritons (SPPs) of various modes, propagating in a metallic nanowire, are studied analytically by solving a transcendental equation. The SPPs of higher-order modes carry orbital angular momentum. The surface plasmon resonances of a nanorod are induced by standing wave of two SPPs of mode 1 propagating in opposite direction at specific frequencies, excited by two pairs of electric crossed bi-dipoles.

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In this study, we successfully fabricate a high-speed of the guard-ring-free planar InAlAs avalanche photodiode (APD). The surface is treated with a thick SiO2 dielectric layer to reduce surface leakage current, the capacitance value down to 0.18 pF, and increase the speed of response. In terms of eye diagrams, this is a clear indication at a bit rate of 12.5 Gb/s. It means that it is operable beyond 10 Gb/s and ideally suited to OC-192 optical fiber communication applications. We obtained a maximum f3dB of 10.96 GHz and the gain-bandwidth product of 95 GHz.

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This work proposes the technique of optical shaping to reduce the required analog bandwidth of low-sampling-rate digital-to-analog converter (DAC) in the ONUs of a delay-division-multiplexing (DDM) OFDM PON. The ONUs successfully employ a low-bandwidth (3.75 GHz) and sub-Nyquist-sampling (7.5 GS/s; one-half of the Nyquist rate) DAC to transmit the 7.5-GHz 16-QAM OFDM data to the central office.

 

In this paper, we demonstrate a silicon ring resonator with OAM emission by adding silica holes along the centers of ring resonator.

 

We first demonstrate a fiber- and free space optical (FSO)-based wavelength-division-multiplexing passive optical network (TWDM-PON) with star-ring architecture to achieve the self-protected operation against fiber fault. The presented PON accomplishes bidirectional 40 Gbps downstream and 10 Gbps upstream transmissions through 50 km fiber and a 2 m FSO connections.

 

The spectrum and extinction ratio analysis of a 2×2 grating coupler directional waveguide with asymmetric Mach-Zehnder interferometers for wave division multiplexing are demonstrated. The targeting wavelength is around 1330 nm, and the extinction ratio is up to 10.97 dB at 1328 nm.