Abstract
A hybrid switching node structure with light and microwave links is proposed, which is applicable to the future data relay satellite systems, aiming at the development trend of coexistence of light- link and microwave-link in the future. An experimental system for the light and microwave hybrid switching node based on wavelength selective optical switches (WSS) and optical transceiver modules, is established. It is shown by our experiment that this hybrid switching node can realize the dynamic bandwidth allocation and wavelength routing while the bit error rate of light link is less than 10?12, which provides a method for solving the hybrid switching problem of light-link and microwave-link on the future data relay satellite systems.
Highlights
With the continuous developments of high-speed data communication, navigation and positioning, high resolution image acquisition and deep space exploration, the transmission demand of large capacity and high-speed data relay satellite services for inter-satellites is rapidly increasing
The test system of light and microwave hybrid switching node is connected as shown in Figure 4, which includes the Agilent E4438 vector signal generator, the DWDM optical transceiver, the optical modulator, the polarization controller, the wavelength division multiplexer and de-multiplexer, the 1 × 4 wavelength selective switch, the photodetector, the Anritsu MS9740A optical spectrum analyzer, the Agilent N9020A MXA signal analyzer and the Anritsu MP1800A BERT
The operating wavelength of the optical transmitter module is 1554.94 nm and 1553.33 nm respectively, which corresponds to Channel 28 and Channel 30 in dense wavelength division multiplexing standard (ITU-T)
Summary
With the continuous developments of high-speed data communication, navigation and positioning, high resolution image acquisition and deep space exploration, the transmission demand of large capacity and high-speed data relay satellite services for inter-satellites is rapidly increasing. The inter-satellite light-link has become an important development trend for data relay satellites. Many developed countries, such as Europe, America and Japan, have successively carried out theoretical research and spaceborne demonstration about the data relay satellite system with inter-satellite light-links, and launched out into corresponding engineering verification and satellite networking project [1] [2]. Microwave link will still be the main body of satellite communication system and space information network system in the future
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