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Tunable all-optical microwave photon frequency conversion device without external electric local oscillator

A technology of microwave photonics and frequency conversion devices, applied in optics, nonlinear optics, instruments, etc., can solve problems affecting normal signal reception and noise performance deterioration

Active Publication Date: 2014-12-17
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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  • Tunable all-optical microwave photon frequency conversion device without external electric local oscillator
  • Tunable all-optical microwave photon frequency conversion device without external electric local oscillator
  • Tunable all-optical microwave photon frequency conversion device without external electric local oscillator

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Embodiment Construction

[0038] like 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 to th...

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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 Applications(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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