Abstract:
A coherent transceiver for an optical network is provided, comprising a laser (101) that is connected to a modulation branch and to a local signal processing branch. Also, an optical device and a communication system comprising at least one such optical device are suggested.
Abstract:
A method and a device for data processing in an UDWDM network are provided, wherein one of at least two OLTs communicates with at least one ONU, wherein the at least one ONU is connected to a splitter that is connected to each of said at least two OLTs, wherein the at least two OLTs are active, and wherein the at least two OLTs provide protection switching and/or load sharing. Furthermore, a communication system is suggested comprising said device.
Abstract:
A method and an optical network component for data processing in an optical network are provided, wherein a first signal and a second signal are influenced by a tunable element, wherein the first signal is an incoming optical signal, wherein the second signal is a local oscillator signal generated by a laser and wherein said laser comprises an optical gain element that is tuned by the tunable element. Furthermore, a communication system is suggested comprising said optical network component, which can be associated with an ONU and/or with an OLT. Suitable for coherent Ultra-Dense Wavelength Division Multiplex (UDWDM) networks.
Abstract:
An optical multi carrier generator is suggested based on an acousto optic modulator with integrated partially reflective mirrors so that a multitude of optical wavelengths at a spectral distance can be created out of a single continuous wave light whereas the created optical lightwaves are separated spatial such that they can be modulated individually.
Abstract:
A method and a device are provided for adjusting a tunable laser of an optical network element, wherein a wavelength of the tunable laser is adjusted by varying a current driving the tunable laser; and wherein the wavelength of the tunable laser is adjusted by varying a temperature of the tunable laser or at least a portion thereof relative to an environmental temperature.
Abstract:
A method and a device for operating a laser in an optical component are provided, wherein the laser is a local oscillator of the optical component; and wherein a linewidth of the laser is broadened. Furthermore, an optical communication system is suggested comprising said optical component.
Abstract:
Bidirectional data signals are exchanged between a central unit and a plurality of network terminals. A modulator unit (MOD_OLT) of the central unit modulates data signals (DSl - DSlO) onto subcarriers (ω 1 - ω 10 ), generates two optical sin- gle sideband signals (LSB) and (USB) and combines both sideband signals with 180° phase shifted carrier signals (CW, CWI). The optical network units select their associated downstream signal and generate an associated upstream signal. The frequencies of the downstream and upstream signals are chosen that reflections do not interfere with the selected signal at the optical network unit and not with the received upstream signals at the central unit.
Abstract:
A method for an optical network system and an optical network system comprising a first optical network unit a second optical network unit including a receiver and a transmitter, wherein the first optical network unit is coupled with the receiver and the transmitter via an asymmetric optical coupling device.
Abstract:
A collimator for a laser assembly including a first electrostatically controllable liquid lense having a first optical axis and a second electrostatically controllable liquid lense having a second optical axis aligned with the first optical axis, a laser comprising such a collimator, and a transmitter using said laser for optical data transmission.
Abstract:
A method and a device for adjusting a laser in an optical network are provided, wherein at least one alive message is transmitted from a first optical component towards a second optical component; and wherein a confirmation message is transmitted from the second optical component to the first optical component determining the wavelength of the laser to be used based on the alive message received by the second optical component. Furthermore, an optical communication system is suggested comprising said optical element.