The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We demonstrate a new approach to generate microwave arbitrary waveforms by phase modulation and optical carrier processing based on gain-transparent SBS. Triangular waveforms at repetition rates of 5.64 and 7.87 GHz, and rectangular waveforms at repetition rates of 5.04 and 7.01 GHz are generated.
Microwave signal generation using sideband injection locking in a Fabry-Pérot laser diode is studied numerically. The frequency tuning range in frequency doubling and maximum RF output power in frequency doubling, tripling, and quadrupling is compared.
A photonic demultiplexer for radio frequency orbital angular momentum (OAM) signals is proposed and experimentally demonstrated based on an optical fiber loop. RF signals at frequency of 10GHz with OAM topological charges of 0, 1 and 2 are successfully recovered with sidemode suppression ratio of ∼20dB.
We review recent experimental demonstrations on optical mm-wave generation and modulation technologies for high-speed radio-over-fiber communication, including the feasibility studies on delivering vector signals over DSB-SC optical mm-wave, duobinary modulation, and Fabry-Perot subharmonic mm-wave generator.
A novel orthogonal wavelength-division-multiplexed passive optical network with 25-GHz channel spacing has been proposed and experimentally demonstrated for the first time. Error-free transmission over 15-km SMF-28 was achieved for both 25-Gb/s downlink and 12.5-Gb/s uplink.
We propose a novel data remodulation scheme with downstream ASK-DPSK signals and OOK upstream signal using RSOA for WDM-PONs. An experiment on 10-Gb/s DPSK with 1.25-Gb/s ASK downstream signals generation and 1.25-Gb/s upstream signal remodulation is demonstrated, and experimental results show error-free operation can be achieved without dispersion compensation.
We propose and experimentally demonstrate bidirectional transmission of signal in WDM-PON using Amplitude Shift Keying (ASK) modulation based on a novel polarization multiplexing approach. Polarizing beam splitter (PBS) is used for regulating extinction ratio (ER) and achieving good optical signal-to-noise ratio (SNR) for signal transmission.
In this letter, we propose and experimentally demonstrate a novel data remodulation on downstream OFSK signals for upstream transmission in WDM-PONs. The OFSK transmitter generates constant-intensity wavelength shift keying signals based on phase modulation and polarization modulation. We successfully demonstrate the proposed WDM-PONs with 2.5 Gb/s downstream OFSK signals and 2.5 Gb/s upstream ASK...
Photobiomodulation (PBM) is a modulation of monochromatic light or laser irradiation (LI) on biosystems, which stimulates or inhibits biological functions but does not result in irreducible damage. As photonic methods that could potentially initiate regeneration or cell proliferation in articular disease, the PBM of low intensity LI (LIL), ~10 mW/cm2, moderate intensity LI (MIL), 102~3 mW/cm2, and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.