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OIL SPILL AISA+ HYPERSPECTRAL DATA DETECTION BASED ON DIFFERENT SEA SURFACE GLINT SUPPRESSION METHODS
Oil Spill Detection Hyperspectral Data Glint Suppression Wavelet Transform Enhanced Lee Filter
2018/5/16
The marine oil spill is a sudden event, and the airborne hyperspectral means to detect the oil spill is an important part of the rapid response. Sun glint, the specular reflection of sun light from wa...
This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling technique for the first time, to the author’s best knowledge. The 4-Gb/s OFDM signal using 16-QAM format modu...
Generation of optical millimeter-wave (mm-wave) signal using a Mach–Zehnder modulator (MZM) based on double-sideband (DSB), single-sideband (SSB), and double-sideband with carrier suppression (DSBCS) ...
RADIO-OVER-FIBER (ROF) systems have attracted much interest for potential use in future broadband wireless communications. Essential to ROF systems is the ability to generate and transmit optical radi...
Noise Suppression for Fiber Radio Transmission on Spectrum-Sliced WDM-PONs Employing Interferometric Structures
Fiber optics communications Radio frequency photonics
2015/5/26
We propose a novel noise-suppression scheme in spectrum-sliced WDM-PONs.Experimentally, low-noise windows can be created in which the noise is reduced by more than 20dB and the performance of vector s...
Semiconductor Laser White Noise Suppression by Optical Filtering with Ultra-Narrowband FBG
Semiconductor lasers Fiber Bragg gratings
2015/5/21
The white frequency noise of semiconductor lasers is attenuated significantly by optical filtering with an ultra-narrowband fiber Bragg grating. This noise reduction will improve carrier phase estimat...
Signal Chirp Design for Suppression of Nonlinear Polarization Scattering in DP-QPSK Transmission
Signal Chirp Design Suppression Nonlinear Polarization Scattering DP-QPSK Transmission
2015/5/21
We analyze chirp techniques for suppression of nonlinear effects in DP-QPSK transmission. Simulations reveal that a significant reduction in nonlinear polarization scattering can be achieved by proper...
Suppression of SBS in a photonic crystal fiber with periodically-varied core diameter
Suppression SBS photonic crystal fiber periodically-varied core diameter
2015/5/20
We experimentally demonstrate 7dB improvement in Brillouin suppression in a photonic crystal fiber by periodically varying the size of the air-hole-structure by only 7% amplitude while keeping a low a...
Exponential suppression of thermal conductance using coherent transport and heterostructures
Exponential suppression thermal conductance coherent transport heterostructures
2015/8/10
We consider coherent thermal conductance through multilayer photonic crystal heterostructures, consisting of a series of cascaded nonidentical photonic crystals. We show that thermal conductance can b...
Novel Thermal Drift Suppression Method in Channel Switching of Mode-hop-free Tunable Laser Array
Semiconductor Lasers Lasers tunable
2015/6/10
A switching time of less than 40 μs has been achieved for a TDA-DFB laser array with a thermal drift suppression technique using the tuning regions of non-lasing lasers as heaters for temperature comp...
Experimental verification of higher-order mode suppression in a bent large-mode-area multi-cladding fiber
Fiber design and fabrication iber properties
2015/6/9
A novel technique to suppress the higher-order mode in a bent large-mode-area triple-cladding fiber is experimentally presented. 3-dB suppression of LP 02 mode is observed on a fabricated triple-cladd...
Optical Carrier Suppression and Balanced Coherent Heterodyne Detection for Improved Performance in Wide-band Microwave Photonic Links
Optical Carrier Suppression Balanced Coherent Heterodyne Detection Improved Performance Wide-band Microwave Photonic Links
2015/6/8
We demonstrate a wide-band microwave photonic link with high gain and dynamic range, low noise figure, and dispersion-free propagation using double sideband suppressed carrier modulation, optical ampl...
M-PSK Versatile Modulation using a Single-electrode Straight-line Phase Modulator and Digital Signal Processing for ISI-suppression
Coherent communications Fiber optics communications
2015/6/5
BPSK, QPSK, and 8-PSK modulation/demodulation was experimentally demonstrated using only a single-electrode straight-line phase modulator for the first time. ISI caused by the modulation was compensat...
In-Band SBS Suppression for Optical High Power Transmitter
Fiber optics optical communications
2015/6/4
No observable implementation loss is demonstrated with an in-band carrier frequency dithering technique to suppress stimulated Brillouin scattering (SBS) in a 50-W optical BPPM transmitter, contrast t...
Simple suppression technique for higher-order mode amplification in bent large mode area triple-cladding fibers
Fiber design fabrication iber properties
2015/6/4
A novel technique to suppress the higher-order mode in bent LMA triple-cladding fibers is proposed. It is shown that the higher-order mode can be coupled to a cladding mode with only an adjustment of ...