Abstract: Proposed is an optical data transmission device for an optical access network that comprises a laser transmission unit, which generates an optical transmission signal, and a driving unit, which controls the laser transmission unit for modulating the transmission signal. The device comprises an optical reception unit that converts the received optical signal into an electrical measurement signal. For this, the reception unit contains a photo-diode and an electrical amplifier. The optical reception unit is separate from the laser transmission unit. A control unit controls the laser transmission unit, such that the optical transmission signal is modulated in dependence on a measurement signal. The control unit measures multiple electrical measurement signals during a measurement interval and determines an averaged received electrical measurement signal.

Abstract: Proposed is a method of estimating a reflection profile of an optical channel. The method comprises different steps. A measured reflection profile of the optical channel is provided. One or more reflection peaks are estimated within the measured reflection profile. A residual reflection profile is determined, by removing the estimated reflection peaks from the measured reflection profile. Furthermore, a modified residual reflection profile is determined, by modifying one or more estimated crosstalk frequency components within the residual reflection profile. Finally, the estimated reflection profile is determined, by superposing the estimated reflection peaks and the modified residual reflection profile.

Abstract: Proposed is an optical data transmission device for an optical access network that comprises a laser transmission unit, which generates an optical transmission signal, and a driving unit, which controls the laser transmission unit for modulating the transmission signal. The device comprises an optical reception unit that converts the received optical signal into an electrical measurement signal. For this, the reception unit contains a photo-diode and an electrical amplifier. The optical reception unit is separate from the laser transmission unit. A control unit controls the laser transmission unit, such that the optical transmission signal is modulated in dependence on a measurement signal. The control unit measures multiple electrical measurement signals during a measurement interval and determines an averaged received electrical measurement signal.