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We characterize a low-phase-noise Kerr frequency comb for carrying data channels. Results show pump wavelength detuning region grows slightly at higher pump power and the phase noise stays relatively unchanged over pump wavelength detuning region.
A multiple-layer-overlay (MLO) modulation format is employed for a 14-km optical fiber link and an enhanced spectral efficiency of 2.36 bits/s/Hz is achieved by multiplexing 3-layer signals with each layer carrying a 2-Gbit/s QPSK signal.
We experimentally demonstrate a 400-Gbit/s free-space optical communications link over 120 meters on the building roof by multiplexing four orbital angular momentum (OAM) modes (OAM l = ±1, ±3) each carrying a 100-Gbit/s data channel.
This paper reports an experimental demonstration of a 16 Gbit/s millimeter-wave communication link using MIMO processing of 2 OAM modes on each of two transmitter/receiver antenna apertures. Two groups of multiplexed OAM beams, each containing OAM beams of ℓ =1 and +3 are generated and transmitted through two transmitter apertures respectively. The two transmitter apertures are separated with a certain...
We experimentally demonstrate free-space optical transmission using two multiplexed OAM-carrying Bessel beams under obstructed path conditions. An OSNR penalty < 2.5 dB is observed when the obstruction is placed in the beam center.
We experimentally demonstrate an apodized aperture for receiving OAM beams carrying 50-Gbaud QPSK channels. The performance in terms of power in desired mode and leakage to neighboring modes is compared with a hard aperture.
Multiplexing/demultiplexing of 1008 data channels using orbital angular momentum (OAM) mode-division-multiplexing combined with wavelength-division-multiplexing is demonstrated. 24 OAM modes, each carrying 42 wavelengths, and each wavelength transporting a 100 Gbit/s QPSK signal, are multiplexed, with an aggregated capacity of 100.8 Tbit/s.
We propose reconfigurable optical add/drop multiplexing in a data link using orbital angular momentum (OAM) mode division multiplexing. Adding/dropping of one OAM mode from three multiplexed OAM modes, each carrying 100 Gbit/s QPSK data is demonstrated, with an OSNR penalty of <; 2dB.
We demonstrate OAM-based reconfigurable optical switching functions among multiple OAM modes. Three-pair OAM modes exchange shows 3.6-dB conversion efficiency and selective data exchange among three 100-Gb/s QPSK OAM channels has a 2.1-dB OSNR penalty.
We demonstrate generation/multiplexing/demultiplexing of polarization-multiplexed (pol-muxed) multiple orbital-angular-momentum (OAM) modes. High spectral efficiency of 25.6-bit/s/Hz is implemented using 10.7-Gbaud 16-QAM signals over pol-muxed four OAM modes. An OSNR penalty less than 3.5 dB is observed.
We demonstrate an approach of four-mode multiplexing/demultiplexing using orthogonal Laguerre-Gaussian modes carrying orbital angular momenta. High spectral efficiency of 12.8-bit/s/Hz is achieved using 10.7-Gbaud 16-QAM signals over four Laguerre-Gaussian modes. Crosstalk <-20 dB and OSNR penalty <2.4 dB are achieved.
Electrostatic detection signals are often corrupted by high frequency noise, power line interference and zero excursion. In order to extract and identify the characteristic points of electrostatic signal correctly, an algorithm combining empirical mode decomposition (EMD) and wavelet threshold de-noising was proposed. Based on the analysis of EMD results, this method applied wavelet threshold de-noising...
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