| LUXDYNE OY Patent applications |
| Patent application number | Title | Published |
|---|
| 20110318014 | NOISE SUPPRESSION IN AN OPTICAL APPARATUS - Apparatus for processing an optical signal carrying symbols. Modulation conversion means converts the optical signal from a first format, wherein each symbol has a unique nominal phase, to a second format, wherein each symbol has a unique combination of nominal phase and nominal amplitude. The modulation conversion means includes a signal splitter for splitting the optical input signal into two optical partial signals, which are directed to respective optical paths. Delay elements cause a mutual temporal difference between the two optical partial signals, which are processed in at least one non-linear regenerator having at least two ports and a gain which depends on the combined signal power directed to the at least two ports. The apparatus directs the optical partial signals from the modulation conversion means to an internal or external photo detector stage in the second format. | 12-29-2011 |
| 20090060525 | ALL-OPTICAL POLARIZATION-INDEPENDENT CLOCK RECOVERY - Simultaneous recovery of several different clock signals is based on coupling an optical input signal into an optical resonator matched with at least four spectral peaks of the input signal. The input signal having arbitrary polarization is divided by a polarizing splitter into a first signal having horizontal polarization and a second signal having vertical polarization. The polarization of the first signal is rotated 90 degrees such that the polarization of the first signal is parallel to the vertical polarization second signal. Both vertically polarized signals are passed through the same optical resonator in opposite directions, and they are combined after passing through the resonator in order to form an output signal. The spectral separation between the first peak and the second peak is equal to a first clock frequency, and the spectral separation between the third peak and the fourth peak is equal to a second clock frequency. The resonator stores optical energy and provides an output also when the input signal is zero. Thus, the output signal includes a first recovered clock signal which exhibits continuous beat at the first clock frequency, and a second recovered clock signal which exhibits continuous beat at the first clock frequency. Only vertically polarized light is passed through the resonator. Thus, variations in the polarization of the input signal do not require continuous re-adjustment of the resonator. | 03-05-2009 |
| 20090016738 | COMPACT ALL-OPTICAL CLOCK RECOVERY DEVICE - A clock recovery device adapted to recover at least one clock signal from an optical input signal. The input signal includes at least one data signal. The clock recovery device-includes a first waveguide, a first optical resonator coupled to the first waveguide, a second optical resonator coupled to the first waveguide, and a combiner to combine signals provided by the first optical resonator and the second optical resonator in order to provide an output signal. A passband of the first optical resonator is matched with a first spectral peak of the input signal, and a passband of the second optical resonator is matched with a second spectral peak of the input signal such that the spectral separation between the first and the second peaks is equal to a clock frequency associated with a first data signal. The optical resonators store optical energy and provide an output also when the data signal is zero. Thus, the output signal includes a first recovered clock signal which exhibits continuous beat at the first clock frequency. The optical resonators are coupled to the same waveguide by evanescent coupling. A high coupling efficiency may be achieved and the use of further optical splitters may be avoided. | 01-15-2009 |
