Method and device for broad-spectrum all-optical wavelength conversion outputting colorless

Abstract

The invention discloses a method and a device for broad-spectrum all-optical wavelength conversion outputting colorless. The method comprises: detecting wavelength of target light emitted by a signal source in real time, when the wavelength changes, according to idler beam wavelength which needs conversion, calculating wavelength of pumping light, and adjusting the wavelength by a pumping source, and then making signal light and pumping light pass through a coupler, an amplifier, a polarization controller, and a conversion waveguide in sequence, the conversion waveguide being flat and having low dispersion. When the wavelength of the pumping light changes with the signal light, phase matching conditions can be satisfied, and four-wave mixing effect occurs, to realize wavelength conversion, so that wavelength of the idler beam remains unchanged. The device comprises a feedback loop formed by a pumping source, a signal source, a wavemeter, and an arithmetic unit, and a conversion waveguide with flat and low dispersion, a coupler, an amplifier, and a polarization controller. The method and the device can realize broad-spectrum all-optical wavelength conversion outputting colorless, and the device has no sensibility to pumping, and application range of a all-optical wavelength converter is greatly increased, and cost is reduced.

Description

technical field [0001] The invention belongs to the field of all-optical signal processing, and relates to a method and device for all-optical wavelength conversion, in particular to a method and device for input colorless and wide-spectrum all-optical wavelength conversion based on a flat low-dispersion waveguide. Wide spectrum usually refers to 3dB conversion bandwidth. Background technique [0002] With the rapid development of the current human mobile Internet and the massive popularization of mobile terminals, high-speed, large-capacity communication requirements are put forward for the network, and 3-super (ultra-high-speed, ultra-large-capacity, ultra-long-distance) all-optical communication networks are receiving more and more attention. . However, all-optical signal processing plays a key role in high-speed and large-capacity optical communication, such as optical signal amplification, regeneration, optical pulse shaping, optical switching, wavelength conversion, a...

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Problems solved by technology

[0004] The main technical disadvantage of existing wavelength converters is that they are very sensitive to the pump wavelength: to achieve wide-spectrum and high-efficiency wavelength conversion, the pump wavelength must be fixed (close to zero dispersion point) and cannot be changed by drifting left and right.

When the signal light changes, the converted idler light (target light) also changes. In order to keep the converted target light constant, the pump wavelength must be changed. However, its conversion characteristics will inevitably be greatly reduced, resulting in small application range and low cost. high

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