A Digital Modulation Signal Source Based on Microwave Photon Technology

A digital modulation signal and microwave photon technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve the problems of restricting the development of high-speed dynamic networks and poor adjustability, and achieve multi-function, high flexibility, and adjustable range big effect

CN103986526BInactive Publication Date: 2016-07-06闫连山 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a digital modulation signal source based on a microwave photon technology. In a digital modulation signal source composed of a mode locked laser 101, a luminous intensity modulator 102, a light polarization modulator 103, a tunable polarization correlation light comb filter 111, a tunable light band pass filter 108, a linearity dispersion medium 109 and a photoelectric detection unit 110, the tunable polarization correlation light comb filter 111 is formed by connecting a light circulator 104, a polarization beam splitter 105, programmable polarization mold dispersion units 106-1 and 106-2, and 45-degree Faraday rotators 107-1 and 107-2 in a specific mode, such that independent tunable comb filtering can be performed on mutually vertical linear polarization states, digital modulation signals with different modulation rates, different carrier wave frequencies, different modulation modes and different duty ratios are generated, and the digital modulation signal source can be applied to multiple important fields such as the transmitting end of a super-speed network, a radio-on-fiber system, a military radar and the like.
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Description

technical field

[0001] The invention relates to the technical field of optical devices, in particular to a digital modulation signal source based on microwave photon technology. Background technique

[0002] The use of optical methods to generate microwave signals (especially higher frequency millimeter waves) is a research topic that has recently attracted attention. It can not only generate millimeter waves for optical wireless systems, but also generate near-infrared signals with a frequency up to THz for military radar, imaging detection, etc. The microwave signal is generated by the optical method, which not only breaks through the electronic bottleneck, but also has the advantages of anti-electromagnetic interference, wide range of tunability, low loss, and wide bandwidth. On the other hand, the digital modulation signal source refers to the equipment used to generate digital modulation signals. Commonly used digital modulation signals include binary amplitude modulat...

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 Shown, the present invention scheme consists of mode-locked laser 101, optical intensity modulator 102, optical polarization modulator 103, tunable polarization-dependent optical comb filter 111, tunable optical bandpass filter 108, linear dispersive medium 109 and optoelectronic The detection unit 110 is constituted. Wherein, the tunable polarization-dependent optical comb filter 111 includes an optical circulator 104, a polarization beam splitter 105, programmable polarization mode dispersion units 106-1, 106-2, 45-degree Faraday rotators 107-1, 107- 2.

[0020] figure 2 It is a specific implementation of the tunable polarization-dependent optical comb filter 111, in which a 45-degree Faraday rotator is used to rotate the polarization state of the forward and reverse signals by +45 0 , the role of the Faraday rotator 107-1 in Figure (a). ...