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A tunable all-optical microwave photonic frequency conversion device without external electric local oscillator

A microwave photonic and frequency conversion device technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as affecting the normal reception of signals and deteriorating noise performance, reducing the number of single machines, suppressing clutter interference, and reducing the impact of frequency conversion performance. Effect

Active Publication Date: 2017-05-03
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

The electro-optic modulator is directly modulated by the high-frequency electric local oscillator, and the nonlinear effect of the waveguide will cause the noise performance to deteriorate
When using a low-frequency electric local oscillator, the entire frequency conversion process needs to use the high-order harmonics of the local oscillator, and the processing process introduces additional clutter interference, which affects the normal reception of the signal

Method used

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  • A tunable all-optical microwave photonic frequency conversion device without external electric local oscillator
  • A tunable all-optical microwave photonic frequency conversion device without external electric local oscillator
  • A tunable all-optical microwave photonic frequency conversion device without external electric local oscillator

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Embodiment Construction

[0038] Such as figure 1 As shown, the all-optical microwave photon frequency conversion device without external electric local oscillator tunable of the present invention includes: narrow linewidth semiconductor laser, nonlinear optical loop, photodetector and low-pass filter, wherein the nonlinear optical loop includes: splitting device, first polarization controller, second polarization controller, optical circulator, dual-drive lithium niobate modulator, optical isolator, single-mode polarization-maintaining fiber, electrical attenuator, electrical power divider, electrical phase shifter, and DC voltage source.

[0039] The optical circulator includes a first port, a second port and a third port, the single-mode polarization-maintaining fiber includes port a and port b, and the dual-drive lithium niobate modulator includes a first radio frequency port, a second radio frequency port and a direct current port.

[0040] The narrow-linewidth semiconductor laser is connected t...

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Abstract

The invention provides a tunable all-optical microwave photon frequency conversion device without an external electric local oscillator. The tunable all-optical microwave photon frequency conversion device mainly comprises a narrow line width semiconductor laser unit, a non-linear optical loop circuit, a photoelectric detector and a low-pass filter; a saturated stimulated brillouin scattering effect is stimulated under the condition of not providing the external electric local oscillator and a circuit is selected to transmit by the non-linear optical loop circuit to generate anti-Stokes light for carrying out frequency conversion on a radio-frequency signal. Noise waves and noise inferences, caused by an optical local oscillator in traditional microwave photon frequency conversion are reduced. Meanwhile, the radio-frequency signal is subjected to high-order modulation by using a double-drive lithium niobate modulator, so that the tunable all-optical microwave photon frequency conversion is realized.

Description

technical field [0001] The invention relates to an all-optical microwave photon frequency conversion device, in particular to a tunable all-optical microwave photon frequency conversion device without an external electric local oscillator, and belongs to the technical field of satellite laser communication and microwave photon processing and forwarding. Background technique [0002] The space-borne broadband microwave photon processing and forwarding system makes full use of the characteristics of microwave photonic technology, such as large bandwidth, integration, strong parallel processing capability, and strong anti-electromagnetic interference ability, to modulate broadband microwave signals into the optical domain, and realize wide bandwidth, multi- Microwave photon processing and forwarding of microwave signals in frequency bands and multi-signal formats. This technology provides an effective solution to solve the problems of small communication capacity, limited numbe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35G02F1/355
Inventor 梁栋谭庆贵蒋炜李小军朱忠博窦金芳
Owner XIAN INSTITUE OF SPACE RADIO TECH
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