Patent ID: 7715720
Filing Date: 2010-05-11
Classification: G02B,H04B,H04J

Abstract:
1. An optical device for receiving and demodulating of a pulsed incoming optical signal transmitted through an optical link, comprising: a 90-degrees optical hybrid having a first and a second inputs, a first, a second, a third and a fourth outputs, receiving the pulsed incoming optical signal with a pulse rate P; a pulsed local oscillator having the same pulse rate P with a duration of each optical pulse equal to T four balanced photodetectors, connected to the first, the second, the third and the fourth outputs of the 90-degrees optical hybrid, the balanced photodetectors having electrical outputs, a digital signal processing (DSP) unit connected to the electrical outputs of the balanced photodetectors, the DSP unit recovering data from the incoming optical signal, wherein the 90-degrees optical hybrid is adapted to mix a pulse of the local oscillator with the duration T