University of California, San Diego
OVERCOMING KERR-INDUCED CAPACITY LIMIT
We have solved the long standing conundrum about the inability of reversing the Kerr-induced nonlinear cross-talk in fiber optic transmission, thereby breaking the key barriers that limit the distance information can travel in fiber optic cables and still be accurately deciphered by a receiver. This advance has the potential to increase the data transmission rates for the fiber optic cables that serve as the backbone of the Internet, cable, wireless and landline networks. The research is published in the June 26, 2015 issue of the journal Science.
ULTRAFAST LIGHT CONTROL BY THREE PHOTONS
We demonstrate all-optical light control by few photons with 500 GHz speed. The method relies on pump depletion in the dispersion engineered parametric fiber mixer. Mixer dispersion design ensures the enhanced energy exchange among the interacting waves, thus allowing the control of the Watt-strong pump wave by three-photon signal. The research is published in the June 19 2014 issue of the journal Science.
FLEX-GRID COMPATIBLE ULTRA WIDE FREQUENCY COMB SOURCE
We have demonstrated the first FlexGrid compatible C+L band (75 nm) parametric frequency comb with 6.25 GHz pitch. The comb source was used for 31.8 Tb/s coherent transmission of 1520 Nyquist UDWDM channels.
This work is a post-deadline publication from Optical Fiber Conference (OFC) 2014.
Breaking the light barrier link
"Combing" Through Light May Give Us Faster, More Powerful Internet link
Frequency combs smooth out optical-fibre signals link
An Advance May Double the Capabilities of Fiber Optics link
Engineers break power and distance barriers for fiber optic communication link
Engineers Just Broke the Capacity Limit For Fiber Optic Transmission link
Researchers have broken the capacity limits of fiber optic networks link
Photon Switch Called the Fastest of its Kind link
500 GHz photon switch is based on subnanometer-scale-engineered optical fiber link
Physicists build first 500 GHz photon switch link
Toward the control of light with light link
Easing the Fiber Capacity Crunch link
The Photonic Systems Laboratory currently supports multiple research thrusts in signal processing, sensing, and communications. The group has developed a new class of parametric devices and used them to achieve records in terabit-scale signal processing, analog-to-digital signal conversion, and high-quality wide-band frequency combs. The core capability of the laboratory, nanometer-scale mixer synthesis, is enabled by a unique facility developed over a half-decade period. The new technology is currently used to construct new classes of agile oscillators and signal processors capable of establishing new records in signal speed, fidelity, and dissipation.
In the second thrust, the laboratory hosts research on communication and sensing in bandwidth constrained physical channels. This technology has led to record spectral efficiencies in optical and free-space links and is currently being developed in both optical and RF domains.
PHOTONIC SYSTEMS GROUP, UNIVERSITY OF CALIFORNIA, SAN DIEGO. ALL RIGHTS RESERVED.