基于磁光开关的高精度光实时延时线
High performance optical true time delay line based on magneto-optic switch
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摘要: 给出了基于高速磁光开关的光实时延时技术的方案。研究了拓扑结构和磁光开关对光延时性能的影响。研制了5 bit,32位的光实时延时系统，并建立了光延时的测试平台，经测试，延时线延时精度优于3 ps。对光延时单元插损进行测试,结果显示:32态单元插损为0.12~0.88 dB,各态变化呈随机性。Abstract: The optical true time delay scheme based on magneto-optic(MO) switch was analyzed, and optical and electrical features of MO switch were discussed. The advantages and disadvantages of different topologies were analyzed, i.e. bypass structure and differential structure. A method for measuring optical delay with high precision and high efficiency was put forward. A 5 bit optical delay line system based on MO switch and fiber was set up, and the maximal delay error was less than 3 ps. The test of optical delay units shows that the insertion loss of 32 delay states ranges from 0.12 dB to 0.88 dB at a temperature of 0 to 40 ℃.
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Key words:
- optical true time delay line /
- magneto-optic switch /
- topology /
- insertion loss
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