Keyword: pcb board, PCB, PCB designing, PCB technique
Increase fiber optic capacity PCB in existing networks by 10-times just by switching to a new kind of transmitter -- that's the claim of a research group at EPFL (École Polytechnique Fédérale de Lausanne, Switzerland). Using sinc-shaped Nyquist pulses, information can be encoded on pulses that overlap in the time domain PCB and use a minimum of spectral bandwidth, thus maximizing optical capacity, according to the EPFL research team of Camille Brès and Luc Thévenaz.
Other groups have tried to produce Nyquist sinc pulses to minimize inter-symbol interference, but had to resort to complex signal generators. Brès and Thévenaz claim their spectral synthesis PCB technique works better, plus is the only one PCB that will be easy to implement for commercial optical transmitters.
"We synthesize a spectrum that gives the perfect pulse shape. We do it by using a simple intensity modulator to generate a set of spectral lines, regularly spaced and showing exactly the same amplitude and the same phase. This gives automatically in the time domain the sinc pulse shape," Thévenaz told us. PCB "This is very simple and straightforward, but nobody thought to do it this way before."
Artists conception of Nyquist pulses encoding PCB 10-times more information (Source: (C) Jamani Caillet / EPFL)
Artists conception of Nyquist pulses encoding 10-times more information (Source: © Jamani Caillet / EPFL)PCB
The EPFL team claims that in the lab a laser and a modulator -- to produce wide-spectrum pulses -- are all that's needed to generate Nyquist pulses that are 99 percent perfect.
The researchers claim that PCB designing a transmitter chip that realizes their encoding technique should be a straightforward exercise for optical chipmakers, and would include "the modulators required to generate the square shaped spectrum and a set of short delay lines and modulators to generate data sequences and to PCB interleave them in the temporal sequence, to increase the data rate," said Thévenaz.
EPFL research team of PCB Luc Thevenaz and Camille Bres claim to pack 10-times as much information in conventional optical fibers.
EPFL research team of Luc Thévenaz and Camille Brès claim to pack 10-times as much information in conventional optical fibers PCB.
The spectral synthesis technique -- which produces a rectangular-shaped, PCB phase-locked frequency comb -- could also be useful in other fields, according to the researchers, including PCB microwave photonics, light storage, and all-optical sampling PCB.
