Ofidium Pty Ltd Patent applications |
Patent application number | Title | Published |
20140294393 | OPTICAL OFDM TRANSMISSION - A method for transmitting digital information having a predetermined bit-rate (B) via a nonlinear optical channel includes determining a combination of transmission parameters comprising a number (N) of subcarriers, an information symbol rate (S) for each subcarrier, and a number (b) of bits per symbol on each subcarrier, such that B=NSb. An optical signal is generated comprising the plurality (N) of orthogonal optical subcarriers. Each subcarrier is modulated to carry a proportion (Sb/B) of the total bit-rate (B) of the digital information. The optical signal is then transmitted to a corresponding optical receiver via the nonlinear optical channel. The received signal has a measurable signal quality (Q) which is a function of the transmission parameters (N, S, b). Determining the combination of transmission parameters comprises selecting the parameters such that the associated signal quality is greater than a corresponding quality for a single-carrier transmission, and greater than a corresponding quality employing a larger number (M>N) of subcarriers. | 10-02-2014 |
20140286642 | ELECTRONIC COMPENSATION OF CROSS-PHASE MODULATION - An optical signal ( | 09-25-2014 |
20130195459 | METHOD AND APPARATUS FOR FIBER NON-LINEARITY MITIGATION | 08-01-2013 |
20130156443 | METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS - An equaliser ( | 06-20-2013 |
20120263461 | MULTICHANNEL NONLINEARITY COMPENSATION IN AN OPTICAL COMMUNICATIONS LINK - An apparatus ( | 10-18-2012 |
20110286747 | OPTICAL TRANSMITTER - A method of generating an information-bearing optical signal ( | 11-24-2011 |
20110013914 | METHOD AND APPARATUS FOR IMPROVING RECEPTION OF OPTICAL SIGNALS - A method and apparatus for receiving digital information transmitted via an optical signal over an optical channel wherein the optical signal includes an optical carrier ( | 01-20-2011 |
20100316393 | METHOD AND APPARATUS FOR RECEPTION OF OPTICAL SIGNALS - An apparatus and method are provided for receiving an optical signal having an optical carrier component and at least one information-bearing optical sideband. In general, an optical filter arrangement ( | 12-16-2010 |
20100247099 | NON-LINEARITY COMPENSATION IN AN OPTICAL TRANSMISSION - A method of transmitting information over a non-linear optical channel includes the step ( | 09-30-2010 |
20100142951 | RECEPTION OF SIGNALS TRANSMITTED OVER A DISPERSIVE OPTICAL CHANNEL - A receiver for recovering transmitted information carried by a received optical signal that has been affected by dispersion includes an optical splitter having an input port arranged to receive the received optical signal, and a plurality of output ports. A proportion of optical power at the input port is transmitted to each of the output ports. A plurality of optical detectors is operably connected to respective output ports of the optical splitter, for generating a corresponding plurality of electrical signals. Optical phase shifters are disposed between the output ports of the optical splitter and respective optical detectors. As a result, each optical phase shifter applies a frequency dependent phase shift to an optical signal passing therethrough. An electronic processor includes analog and/or digital electronic components configured to combine two or more of the plurality of electrical signals, or information recovered separately therefrom, in order to provide improved accuracy or reliability of information recovery as compared with detecting and processing only the received optical signal. The receiver is advantageously able to mitigate the effects of frequency-dependent fading which may occur in intensity modulation/direct detection optical transmission systems due to dispersion in optical transmission paths. | 06-10-2010 |
20100034542 | METHODS AND APPARATUS FOR GENERATION AND TRANSMISSION OF OPTICAL SIGNALS - Methods and apparatus ( | 02-11-2010 |