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 experimentally demonstrate Dual Polarization 64 QAM at 100 GBaud performing below the 20% soft FEC threshold of 4×10−2 over 300 km of ultra large effective area fiber at a record line rate of 1.2-Tbit/s.
Enabled by an integrated InP membrane cascaded aperture optical receiver with flexibly-designed light collection aperture and >67 GHz bandwidth, the record-breaking 200 Gbps (5λ×40 Gbps) OOK data transmission is achieved over a 2 meter indoor optical wireless link.
We demonstrate a 218-Gb/s direct detection receiver using Kramers-Kronig optical phase reconstruction and chromatic dispersion compensation based on a single photodiode and achieve single-span transmission over 125 km of standard singlemode fiber at 1550 nm.
We experimentally compare the performance of probabilistically-shaped 64QAM (PS64QAM), 64APSK, 64QAM and 32QAM in terms of both SNR and mutual information for transoceanic distances. We show that PS64QAM outperforms all other formats.
We demonstrate high-bitrate coherent optical OFDM transmission utilizing low-noise Kerr frequency comb as multi-channel laser source. 4QAM-OFDM data with total bitrate of 136.0 Gb/s are successfully transmitted over a 100 km fiber link.
Compact electrooptical modulators are demonstrated on thin-film lithium niobate on silicon with half-wave voltage-length product of 3.1 to 6.5 V.cm (from DC up to 50 GHz), 18 dB extinction ratio, and 33GHz 3-dB electrical bandwidth.
A QSFP-packaged 100Gb/s CWDM4 transceiver is demonstrated by a hybrid assembly of a commercial silicon photonics chip containing modulators and electronics, a silica based mux/demux PLC, and a MEMS carrier with four InP lasers.
Free-space optical communications has been of interest for many years, however, there remain theoretical and algorithmic challenges in its implementation. In this paper, I describe recent trends and results from our research in advancing the modelling and information theory for free-space optical channels in space and in scattering environments.
A 10Gbps/5GHz 16-QAM-OFDM underwater wireless laser transmission system based on light injection and optoelectronic feedback techniques is proposed and demonstrated. Good bit error rate performance and constellation map are achieved over a 10-m underwater link.
A compact 8 lane Integrated ROSA with low optical loss 1:8 Optical de-multiplexer is developed. The package size is 22.3 mm × 12.0 mm × 5.3 mm. The total optical insertion loss is estimated to be 1.0dB.
We report on the development of optical engines based upon multi-channel Extended C-Band tunable InP PICs operating up to 44Gbaud, 16-QAM for a total capacity of 4.9 Tb/s.
In this paper, coupling efficiency between free-space-optical beam and few-mode fibers under atmosphere turbulence is investigated when adaptive optics (AO) is used for compensating wave-front aberrations. The experimental results show that, the coupling efficiency of SMF, two mode fiber and four mode fiber is improved by 16 dB, 11 dB and 10 dB with AO under moderate turbulence.
Owing to the breakthrough of Ge/Si avalanche photodiode, we developed a cost effective 25G APD TO-can solution for various 100G applications including 100G-PON, 5G wireless, and data center applications with PAM4 and DMT modulations.
Nearly half the world population, greater than three billion in total, has either no access or fairly poor access to the internet. Facebook, through its internet.org partnership intends to provide internet access to the developing countries of the world. The required data-rate to provide internet service to those online simultaneously in these countries is estimated at well over 100 Tbps; a staggering...
We report a polarization-multiplexed 320 Gbaud, 64 QAM coherent optical Nyquist pulse transmission with a frequency-stabilized mode-locked laser. Single-channel 3.84 Tbit/s data were successfully transmitted over 150 km with a spectral efficiency of 10.6 bit/s/Hz.
With joint LUT-based pre-distortion and DBP-based post-compensation to mitigate the opto-electronic components and fiber nonlinearity impairments, we demonstrate the unrepeatered transmission of 1.6Tb/s based on 4-lane 400G single-carrier PDM-16QAM over 205-km SSMF without distributed amplifier.
We propose and experimentally demonstrate the adaptive physical-layer network coding to boost throughput of VLC-based two-way relay networks. Experimental results show that the network capacity can be improved by 100% with ∼2.5-dB SNR penalty.
We present a novel optical quantization technique based on intensity-to-frequency conversion using frequency chirp in a quantum-dot semiconductor optical amplifier. A four-level signal at 10-GSamples/s is successfully achieved for photonic analog-to-digital conversions.
A tunable optical channel slicing and stitching scheme is experimentally demonstrated in QPSK/16QAM systems. Its application to dynamic bandwidth allocation in WDM channels brings >6dB OSNR improvement at 1e-3 BER comparing to direct channel insertion.
We summarized the latest progress on enabling technologies for high speed VLC system beyond Gigabit/s including advanced modulation formats, software and hardware pre-equalization, advanced coding and nonlinear compensation.
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.