Device and method for generating frequency doubling single side band optical carrier millimeter waves

Abstract

The invention discloses a device and a method for generating frequency doubling single side band optical carrier millimeter waves in the field of optical communication. The device comprises an adjustable optical source, a radio frequency signal source, an electric amplifier, an electric shunt, a phase shifter and a nested Mach-Zehnder modulator, wherein the output end of the adjustable optical source is connected with the optical input end of the nested Mach-Zehnder modulator; the output end of the radio frequency signal source is connected with the input end of the electric amplifier; the output end of the electric amplifier is connected with the input end of the electric shunt; two output ports of the electric shunt are connected with a radio-frequency driving port of an upper arm sub-modulator of the nested Mach-Zehnder modulator and an input port of the phase shifter respectively; and the output end of the phase shifter is connected with a radio-frequency driving port of a lower arm sub-modulator of the nested Mach-Zehnder modulator. The method comprises the steps of: regulating the phase shift amount of the phase shifter, and arranging the main bias voltage of the nested Mach-Zehnder modulator and the bias voltage of the upper arm and lower arm sub-modulators reasonably. By the device and the method, a structure of a system is simplified, and the tenability and expansibility of the system are improved.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a device and method for generating double-frequency single-sideband optical-carried millimeter waves. Background technique [0002] Optical fiber-wireless communication technology uses optical fiber links to transmit radio signals, and organically combines the characteristics of broadband wireless communication such as mobility and point-to-multipoint access with the ultra-bandwidth and high reliability of optical fiber communication to provide large-capacity, low-cost Wired transmission of radio signals and ultra-broadband wireless access exceeding Gbit / s provide an ideal solution. For fiber-optic wireless systems, generating high-quality optical-carrying millimeter waves is one of the key technologies to realize system communication. In recent years, researchers at home and abroad have proposed many optical millimeter wave generation schemes, including double-sideband opti...

AI Technical Summary

Problems solved by technology

However, the device uses more optical external components, resulting in a large insertion loss of the entire system

On the other hand, since the device uses an optical band-pass filter to filter out one of the second-order sidebands, the range of the central wavelength and passband frequency of the optical band-pass filter must be able to The frequency change is adjusted, the tunability of the whole device is poor, especially it is not easy to extend to the wavelength division multiplexing system

Images