Eurekalert April 8, 2019 The successful development of Space-Division-Multiplexing (SDM) amplifiers is crucial for commercial realization of SDM technologies. Researchers in Japan developed a 19-core Erbium-doped-fiber amplifier utilizing cladding-pumping technology in order to share electrical power between the large number of spatial channels. The amplifier was integrated into a transmission test bed of for a record transmission demonstration. Fully decoded optical data transmission of 715 Tb/s was achieved over 2,009 km using coded polarization division multiplexed (PDM) -16 quadrature-amplitude modulation (QAM) of 345 carriers over the C and L band in a re-circulating transmission loop. The research enables development of […]
Tag Archives: Data transmission
Recovering scattered data from twisted light via ‘scattering-matrix-assisted retrieval technique (SMART)’
Phys.org March 14, 2019 Multiplexing multiple orbital angular momentum (OAM) channels enables high-capacity optical communication but decreases the orthogonality between OAM channels for demultiplexing and eventually increases crosstalk in communication. To overcome this an international team of researchers (China, USA – Caltech, Howard Hughes Medical Institute, the Netherlands, France) developed scattering-matrix-assisted retrieval technique (SMART) to demultiplex OAM channels from highly scattered optical fields and achieve an experimental crosstalk of –13.8 dB in the parallel sorting of 24 OAM channels after passing through a scattering medium. They demonstrated high-fidelity transmission of images under scattering conditions at an error rate of <0.08%. using […]
Data transfer by controlled noise
Phys.org March 1, 2019 Researchers in Switzerland used double-slit experiment to show that correlations indicate how well one can predict, for instance, the oscillatory phase of one light wave if one knows the phase of the other wave. Even if both phases are noisy they can still do so in a more or less synchronized fashion. They have demonstrated that correlations exist between pairs of light waves, which means that the number of those correlations does not increase linearly with the number of light waves, but roughly quadratically. In principle, therefore, it should be possible to transmit six bits of […]
Data-transmitting light signal gets power boost from nanosized amplifier
Nanowerk February 5, 2019 Atomic layer deposition method has been used mainly in electronic applications. An international team of researchers (Finland, France, UK) reports ultra-high on-chip optical gain in erbium-based hybrid slot waveguides with a monolithic, CMOS-compatible and scalable atomic-layer deposition process. They have demonstrated up to 20.1 ± 7.31 dB/cm and at least 52.4 ± 13.8 dB/cm net modal and material gain per unit length, respectively. The study showed that a light signal can be potentially boosted regarless of the structure of the microchip. The results indicate that atomic layer deposition is a promising method for developing microchip photonic processes…read more. Open Access TECHNICAL ARTICLE