Optical phase-locked loop device based on direct digital frequency synthesizer and phase-locking method
A frequency synthesizer, digital technology, applied in electromagnetic receivers, electromagnetic transmitters, electrical components, etc., can solve problems such as phase-locked control bandwidth limitations, and achieve the requirements of increasing control bandwidth, realizing automatic tracking, and reducing line width Effect
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[0025] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited by this.
[0026] figure 1 It is a structural block diagram of an optical phase-locked loop device based on a direct digital frequency synthesizer of the present invention. The solid line is the connection of electrical signals, and the dashed line is the connection of optical signals. It can be seen from the figure that the optical phase-locked loop device based on the direct digital frequency synthesizer of the present invention includes a 90-degree optical bridge 1, a first balanced detector 2, a second balanced detector 3, a mixer 4, and a first mode Digital converter 5, serial-parallel conversion chip 6, FPGA7, DDS8, microwave amplifier 9, optical intensity modulator 10, fiber grating filter 11, fiber splitter 12, fiber amplifier 13, first digital-to-analog converter 14, narrow Linewidth tunab...
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