Stable microwave oscillator

A technology of photoelectric oscillator and microwave amplifier, which is applied in the direction of solid-state lasers, etc., can solve the problems that stability and spurious mode suppression cannot be taken into account at the same time, and the phase noise deterioration of OEO oscillation signals, etc., achieves simple structure, high signal-to-noise ratio, and easy Achieved effect

Inactive Publication Date: 2014-02-05
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the limitations of the existing OEO technical solutions and solve the defects that the existing OEO solutions cannot take into account both stability and spurious mode suppression or will introduce additional noise to...

Method used

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  • Stable microwave oscillator
  • Stable microwave oscillator
  • Stable microwave oscillator

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Embodiment 1

[0025] according to figure 1 with figure 2A stable optoelectronic oscillator shown mainly consists of a laser 1, an electro-optic modulator 2, a length of optical fiber 3, a photodetector 4, a microwave amplifier 5, an electric band-pass filter 6, an electric tuner Microwave phase shifter 7, a highly stable microwave source 8, a 2×1 multiplexer or directional coupler D, the first 1×2 power divider or directional coupler A, the second 1×2 power divider or directional coupler Coupler B, the third 1 * 2 power splitter or directional coupler C and phase-locked control module 9 constitute, wherein, phase-locked control module 9 is mainly composed of a mixer 10, an electric low-pass filter 11, a The servo controller 12 is formed, the output terminal of the mixer 10 is connected to the input terminal of the electric low-pass filter 11 , and the output terminal of the electric low-pass filter 11 is connected to the input terminal of the servo control module 12 . The output end of t...

Embodiment 2

[0028] according to figure 2 with image 3 A stable optoelectronic oscillator shown mainly consists of a laser 1, an electro-optic modulator 2, a section of long optical fiber 3, a photodetector 4, an optical amplifier 13, an electric band-pass filter 6, an electric adjustable A microwave phase shifter 7, a highly stable microwave source 8, a 2x1 directional coupler D, a first 1x2 power divider A, a second 1x2 power divider B, a third 1x2 power divider C and Phase-locking control module 9 is formed, and wherein, phase-locking control module 9 is mainly made up of a mixer 10, an electric low-pass filter 11, a servo controller 12, and the output terminal of mixer 10 is connected to electric low The input end of the electric low-pass filter 11 is connected to the input end of the servo control module 12 . The output end of the laser 1 is connected to the optical input end of the electro-optic modulator 2, the output end of the electro-optic modulator 2 is connected to the inpu...

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Abstract

The invention discloses a stable photoelectric oscillator. The stable photoelectric oscillator comprises a laser device, an electro-optical modulator, a long optical fiber, a photoelectric detector, an amplifier, an electric band-pass filter, an electrically-controlled microwave phase shifter, a high-stability microwave source, a 2*1 wave combiner or directional coupler, a first 1*2 power divider or directional coupler, a second 1*2 power divider or directional coupler, a third 1*2 power divider or directional coupler and a phase locking control module, wherein the phase locking control module comprises a frequency mixer, an electric low pass filter and a servo control module, the output end of the frequency mixer is connected to the input end of the electric low pass filter, and the output end of the electric low pass filter is connected to the input end of the servo control module. According to the stable photoelectric oscillator, an electric injection of the external high-stability microwave source and a phase locking control mechanism are added based on a traditional single-loop OEO structure. Compared with the prior art, the stable photoelectric oscillator has the advantages that insertion loss of an optical link in a resonant cavity is not increased, the high signal to noise ratio of the photoelectric resonant cavity is maintained, and the structural complexity of the stable photoelectric oscillator is lower than that of an existing scheme. The stable photoelectric oscillator is easy to obtain.

Description

Technical field [0001] The invention belongs to the technical field of microwave and optoelectronics, and in particular relates to a photoelectric oscillator. Background technique [0002] Optoelectronic Oscillator (OEO: Optoelectronic Oscillator) is a new type of oscillator that uses optical energy storage elements with high quality factor (Q value) to replace traditional microwave energy storage elements. It is characterized by generating microwave signals with pure spectrum. The phase noise of the oscillating signal is much smaller than that of current electrical oscillators. The basic structure of OEO was first proposed by X.Steve Yao and Lute Maleki in 1994, including a laser and an electro-optic modulator, a long optical delay line (such as optical fiber, etc.), a photodetector, a microwave amplifier, a A closed feedback loop formed by the band-pass filter, wherein the output signal of the band-pass filter is fed back to the microwave input terminal of the electro-opt...

Claims

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Application Information

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IPC IPC(8): H01S1/02
Inventor 杨春洪俊曹哲玮
Owner SOUTHEAST UNIV
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