An optical device equips a piece of communication equipment of an optical wireless communication network, and includes a monolithic optical element including at least one ruled optical surface having a curved generatrix selected to present an orientation that varies harmonically as a function of angular position, so as to spatially orient a radiation pattern for transmission and/or a radiation pattern for reception of light waves.

Network elements and methods of use, including a transmitter comprising a client-side input, signal and clock conditioning blocks, a modulation block, and antennas. The client-side input receives baseband signals having client data. The signal conditioning block adjusts signal characteristics of the baseband signals to generate intermediate signals. The clock conditioning block receives a first clock signal having a first clock frequency and adjusts signal characteristics of the first clock signal to generate a second clock signal having a harmonic frequency of the first clock frequency. The modulation block modulates the intermediate signals onto the second clock signal to generate antenna feed signals. The antennas generate radiated signals based on the antenna feed signals and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection with a transmission frequency in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz).

Network elements and methods of use, including a transmitter comprising a client-side input, signal and clock conditioning blocks, a modulation block, and antennas. The client-side input receives baseband signals having client data. The signal conditioning block adjusts signal characteristics of the baseband signals to generate intermediate signals. The clock conditioning block receives a first clock signal having a first clock frequency and adjusts signal characteristics of the first clock signal to generate a second clock signal having a harmonic frequency of the first clock frequency. The modulation block modulates the intermediate signals onto the second clock signal to generate antenna feed signals. The antennas generate radiated signals based on the antenna feed signals and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection with a transmission frequency in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz).

Provided are an optical amplification circuit, an optical amplification method, and an optical circuit for amplifying an unpolarized optical signal. The optical amplification circuit may include an input interface, a pair of optical amplifiers having Polarization-Dependent Gain (PDG) profiles, and an output interface. The input interface receives the unpolarized optical signal. The input interface outputs a first polarization component and a second polarization component based on the received unpolarized optical signal. The pair of optical amplifiers may amplify the first polarization component and the second polarization component based on the PDG profiles. The output interface may output an amplified version of the unpolarized optical signal based on the amplified first polarization component and the amplified second polarization component.

Provided are an optical amplification circuit, an optical amplification method, and an optical circuit for amplifying an unpolarized optical signal. The optical amplification circuit may include an input interface, a pair of optical amplifiers having Polarization-Dependent Gain (PDG) profiles, and an output interface. The input interface receives the unpolarized optical signal. The input interface outputs a first polarization component and a second polarization component based on the received unpolarized optical signal. The pair of optical amplifiers may amplify the first polarization component and the second polarization component based on the PDG profiles. The output interface may output an amplified version of the unpolarized optical signal based on the amplified first polarization component and the amplified second polarization component.

An optical transmission device is configured to receive and process an optical signal received via an optical transmission line, the optical transmission device including: an output unit configured to output information concerning deviation of an amplitude characteristic of the received optical signal; a tunable optical filter (TOF) configured to filter the received optical signal; a controller configured to control a setting of the TOF based on the information concerning the deviation of the amplitude characteristic.

An optical transmission device is configured to receive and process an optical signal received via an optical transmission line, the optical transmission device including: an output unit configured to output information concerning deviation of an amplitude characteristic of the received optical signal; a tunable optical filter (TOF) configured to filter the received optical signal; a controller configured to control a setting of the TOF based on the information concerning the deviation of the amplitude characteristic.