Full-optical-wavelength conversion simplifying device and full-optical-wavelength conversion simplifying method of polarization multiplexing system without polarization crosstalk

Abstract

The invention discloses a full-optical-wavelength conversion simplifying device and a full-optical-wavelength conversion simplifying method of a polarization multiplexing system without polarization crosstalk. A wavelength conversion structure of polarization diversity is adopted and two polarization beam splitters are used for respectively dividing signal light and pump light into two groups of mutually-orthorhombic polarization films; two baseband data signals are respectively modulated to two mutually-orthorhombic polarization modes of the signal light to form a modulating signal; the modulating signal and the pump light in the same polarization direction are coupled and then are respectively transmitted into two semiconductor optical amplifiers (SOA); and each SOA independently realizes the wavelength conversion in the same polarization direction. According to the full-optical-wavelength conversion simplifying device and the full-optical-wavelength conversion simplifying method, the crosstalk between polarization multiplexing channels, which is caused by the polarization dependence of a gain in polarization multiplexing wavelength conversion of one SOA, can be overcome; the performance of a wavelength conversion system is improved; the wavelength conversion device has a simple structure and the system is easily integrated; and the wavelength conversion device can be applied to a full-optical-wavelength conversion system of polarization multiplexing signals with the different modulating formats.

Description

(1) Technical field [0001] The invention belongs to the field of All Optical Wavelength Conversion (AOWC for short) communication in microwave photonics technology. (2) Background technology [0002] At present, high-speed and large-capacity communication systems have become an inevitable trend. In a wavelength division multiplexing (Wavelength Division Multiplexing, abbreviated as WDM) network, multiple channels are simultaneously transmitted on the same optical fiber, and DWDM (Dense Wavelength Division Multiplexing, abbreviated as DWDM) has higher spectral efficiency. However, in the existing optical fiber system, the development of DWDM has reached its limit, and it is very difficult to expand the capacity by adding new optical wavelengths. Therefore, increasing the single-wavelength communication rate has become a main candidate. The single-wavelength 100Gbit / s rate is considered to be the data transmission rate of the next generation of large-capacity optical communic...

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Problems solved by technology

[0010] In view of the above situation, the present invention solves the problem of crosstalk between polarization multiplexing signals caused by polarization rotation existing in the all-optical wavelength conversion of the polarization multiplexing system, and uses two polarization beam splitters to split the signal light and pump light into Two mutually orthogonal polarization modes, the two baseband data signals are respectively modulated onto the two mutually orthogonal polarization modes of the signal light to form a modulation signal, and then the modulation signal and the pump light in the same polarization direction are coupled separately and respectively It is sent to two semiconductor optical amplifiers (SOAs), and the wavelength conversion in the same polarization direction is independently realized in the two SOAs, which overcomes the conventional polarization-dependent band of SOA gain in the wavelength conversion of polarization multiplexing signals in one SOA The crosstalk between the incoming polarization multiplexing channels improves the wavelength conversion performance of the polarization multiplexing system

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