Browsing Over 295 Presentations
MC1.1 - RECENT ADVANCES IN SUBMARINE TRANSMISSION SYSTEMS
Abstract
Abstract
A tutorial on fiber-optic submarine transmission systems is provided. After an introduction to wet plant and cable engineering and giving a perspective on the present and future of this technology, we cover the information theory, signal processing, modeling, and optimization algorithms to architect transoceanic systems.
MC2.1 - NONLINEARITY MITIGATION WITH ADAPTIVE FILTERS
Abstract
Abstract
In this work nonlinear noise caused by interfering WDM channels is discussed. Two adaptive filter techniques are reviewed, fast LMS and generalized filters. Both their individual and combined performance is shown over trans-oceanic transmission distances.
MC2.2 - HYBRID FIBER LINKS USING QUASI-SINGLE-MODE FIBERS
Abstract
Abstract
We compute the optimized fiber splitting ratio of hybrid spans composed of quasi-single-mode (QSM) fibers and single mode fibers using numerical simulations. We show that the optimum ratio increases with the span length, the fiber effective area, and the residual of multipath interference at receiver.
MC2.3 - JOINT LOW-COMPLEXITY OPTO-ELECTRONIC CHROMATIC DISPERSION COMPENSATION FOR SHORT-REACH TRANSMISSION
Abstract
Abstract
A low complexity solution to mitigate chromatic dispersion is proposed for short-reach communications. The technique relies on sharing complexity between optical and electronic domain and shows gains in terms of required receiver SNR for up to 20-km fiber transmission.
MC2.4 - TECHNIQUES FOR OPTICAL PARAMETRIC AMPLIFICATION USING HIGHLY NONLINEAR FIBER
Abstract
Abstract
We review parametric techniques for wideband amplification. Dispersion stable highly nonlinear fibers show operation bandwidth up to 50nm thanks to longitudinal dispersion stability and forth order dispersion close to zero. Quasi phase matching brings flat 20 dB gain by only 1 W order pump power.
MC3.1 - NEXT GENERATION INFRARED TECHNOLOGY
Abstract
Abstract
The imaging technology including materials, detectors, optics and imaging system design have dramatically improved over last decade. In this presentation new directions toward infrared imaging with a future perspective will be discussed.
MC3.2 - Dispersion engineered metasurfaces for broadband achromatic optics
Abstract
Abstract
Chromatic aberrations in lenses are challenging to correct over large bandwidth. We show that dispersion-tailored and polarization-insensitive metasurfaces comprising counterintuitive anisotropic nanofins can correct the chromatic aberrations simple singlet lenses to sophisticated microscope objectives with unprecedented compactness.MC3.3 - WAVELENGTH MODULATION SPECTROSCOPY ENHANCED BY MACHINE LEARNING FOR EARLY FIRE DETECTION
Abstract
Abstract
We proposed and demonstrated a new machine learning algorithm for wavelength modulation spectroscopy to enhance the accuracy of fire detection. The result shows more than 8% of accuracy improvement by analyzing CO/CO2 2f signals.
MC3.4 - BIG DATA ANALYTICS ON FIBER-OPTICAL DISTRIBUTED ACOUSTIC SENSING WITH RAYLEIGH ENHANCEMENTS
- Z. Peng (US) University of Pittsburgh
- J. Jian (US) University of Pittsburgh
- M. Wang (US) University of Pittsburgh
- Q. Wang (US) University of Pittsburgh
- T. Boyer (US) University of Pittsburgh
- H. Wen (CN) Wuhan University of Technology
- H. Liu (CN) Beihang University
- Z. Mao (US) University of Pittsburgh
- K. Chen (US) University of Pittsburgh
Abstract
Abstract
This paper presents a technique to use deep neural network on data analysis of distributed acoustic sensing (DAS) system built by phase-sensitive optical time-domain reflectometry (Φ-OTDR) with Rayleigh enhancement.
MC3.5 - 25 GHZ BANDWIDTH HIGH SPEED PHOTODIODE FOR TWO-MICRON WAVELENGTH APPLICATION
Abstract
Abstract
This work reports a normal incident high speed photodiode operating at two-micron wavelength with InGaAs/GaAsSb type-II multiple quantum wells absorber. A 3dB bandwidth of 25 GHz can be achieved, which is, in our knowledge, the fastest photodiode at 2-micron wavelength.
MC4.1 - HIGH-POWER FLIP-CHIP BONDED PHOTODIODE WORKING AT 1064NM
Abstract
Abstract
We demonstrate back-illuminated flip-chip-bonded modified uni-traveling carrier photodiodes for 1064 nm. The bandwidth is 40 GHz and the RF output power is 23.5 dBm at 25 GHz. The photodiode has responsivity of 0.46 A/W at 1064 nm and dark current of 2 nA at -8 V.
MC4.2 - TYPE-II HYBRID ABSORBER UTC-PDS WITH ENHANCED SPEED AND RESPONSIVITY PERFORMANCES ACROSS 1.3 TO 1.55 μm WAVELENGTHS
Abstract
Abstract
Using type-II GaAs0.5Sb0.5/In0.53Ga0.47As hybrid absorber in UTC-PD, significant enhancement (16.7%) in responsivity across 1.31-1.55μm wavelength is achieved. With top-illuminated structure and large active mesa (25μm), such device exhibits >40(33) GHz O-E bandwidths, good responsivities (0.53 (0.7)A/W), and high saturation currents (>5mA) under 1.55 (1.31)μm wavelength.