A novel multifunctional frequency-doubling optoelectronic oscillator (FD-OEO) mainly based on a Mach-Zehnder modulator (MZM) cascaded with phase (PM) and subsequent optical bandpass filter (OBPF) is proposed. We experimentally demonstrate simultaneous operations of frequency-doubled clock (FD-OC) recovery, low-duty-cycle dual-wavelength prescaled OC recovery error-free fourfold time division demultiplexing the proposed OEO injected 4 × 25-Gb/s time-division-multiplexing (OTDM) signal. show...

Bit error rate (BER) versus optical signal to noise ratio (OSNR) characteristics determines the transmission performance for coherent transponder. We have developed a model predict BER OSNR at various receiver power (ROP). The has three parameters, which are related floor, filter mismatching, and value without loading. is applied high baud quadrature amplitude modulation (QAM) transponders. By considering influence of on fitting accurate prediction transponder can be achieved over rates....

A novel method to simultaneously detect power imbalance, modulation strength, and bias drift of coherent IQ transmitter during the initial power-up is presented. This achieved by sweeping gain scaling factor finite impulse filter in a digital domain monitoring combined output power. Furthermore, dithering filter, imbalance measured with live traffic. Those impairments can be compensated accordingly. For example, through adjustment setting radio frequency amplifier. works for multiple...

A fluid model of direct-current (DC) discharge in argon atmosphere between the gaps rod-plane electrode configuration was established, and models two geometrically similar were solved using finite-element method, respectively. The dimension ratio set as 10:1, gas pressure ～133.3 Pa for prototype ～133 scale-down gap; to same DC voltages applied. Voltage-current characteristics, well physical parameters (such electric potential, field, electron density, ion temperature) obtained. Relations...

We propose and demonstrate an improved optoelectronic oscillator based on a dual-parallel Mach-Zehnder modulator for simultaneous low-duty-cycle low-phase-noise clock recovery from NRZ signal wavelength-preserved NRZ-to-RZ format conversion. A 25-GHz optical with 25% duty cycle 22.5-dB extinction ratio is successfully extracted the incident 25-Gb/s signal. Benefiting intrinsic property of oscillator, electrical 174-fs root-mean-square timing jitter (100 Hz-10 MHz) also achieved....

We presented 980-nm oxide-confined vertical-cavity surface-emitting lasers (VCSELs) with a 16-μm oxide aperture. Optical power, voltage, and emission wavelength are measured in an ambient temperature range of 5 °C–80 °C. Measurements combined empirical model used to analyse the power dissipation device physical mechanism contributing thermal rollover phenomenon VCSEL. It is found that carrier leakage induced self-heating active region Joule heating caused by series resistance main sources...

While in the past, silicon, package and system could be designed sequentially, at silicon nodes less than 40nm, interconnects between chip, are becoming limiting factor performance reliability. To better capture warpage fatigue, an improved slice model with much more detail about bumps, microbumps, underfill, fillet etc., was simulated. The interposer array-type Through-Silicon Vias (TSVs) can regarded as a composite material. Hence, effective modulus Coefficient of Thermal Expansion (CTE)...

Quality of optical signal can be severely degraded after a long distance fiber transmission, therefore all-optical 2R (re-amplification, re-shaping) regeneration is required for its low power consumption and good potential high-speed operation. Semiconductor amplifier (SOA) very promising candidate due to relatively nonlinear switching threshold possibility integration. However, speeds the existing schemes based on SOAs are limited by pattern effects introduced carrier recovery time. So far,...

All-optical wavelength-preserved 2R regeneration with simultaneous wavelength conversion of 100-Gb/s OOK signal is experimentally demonstrated based on cross-gain compression in SOAs. Receiving sensitivity improved by more than 1.7 dB the regenerated signal.

In this paper, an active mixing UHF-Band 8 channels digital array module is introduced. Eight independent RF and transceiving are integrated. three-dimensional layout, standardization modularization design adopted. The power supply only 28 V, signal control data transmission go through optical fiber. Good measured results obtained.

A 25-GHz 3-ps optical Gaussian pulse generator using phase modulators is experimentally demonstrated with wavelength tunability over C-band. Error-free 100-km transmission of 100-Gb/s OTDM signal achieved it.

A 25-GHz 1.9-ps optical pulse generator using a phase modulator and Mamyshev reshaper is demonstrated. It further applied to 200-Gb/s OTDM system for 300-km transmission.

This paper studies the trajectory tracking problem of unmanned surface vehicle with sensor deviation faults. Firstly, controller based on model predictive control is designed according to physical characteristics system. Moreover, an event trigger mechanism explored in reduce waste computing resources. Then, a H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</inf> fault estimator accurately estimate value Finally, influence faults analyzed....

Aiming at the electromagnetic interference problem of UHV transmission lines on civil aviation communication, navigation and monitoring stations, article carried out a 1000KV on-site environment test, then used principle space wave propagation to calculate evaluation point based test results Signal field strength. Combined with requirements protection distance for localizers involved in example should not be less than 909.6m, glide beacons 350.9m.

We demonstrated 100-GHz clock recovery from 100-Gb/s RZ-OOK optical signal. Fabry-Perot cavity was used as primary stage, SOA and filter deployed to reduce the amplitude fluctuation 46% 12%.

This paper presents a method of studying electromagnetic field using Simplorer and Maxwell software. The basic principles control are discussed, including excitation power supply, magnetic field, the relationship between electric field. ideas steps establishing research model software introduced. building up coil circuit supply has positive guidance help for application