CN115015630B - Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator - Google Patents
Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator Download PDFInfo
- Publication number
- CN115015630B CN115015630B CN202210607132.5A CN202210607132A CN115015630B CN 115015630 B CN115015630 B CN 115015630B CN 202210607132 A CN202210607132 A CN 202210607132A CN 115015630 B CN115015630 B CN 115015630B
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- ultra
- electric
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses an ultra-weak frequency offset signal detection system and method based on a photoelectric oscillator, comprising the following steps: the device comprises a laser emitting module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency deviation signal detection module; the laser emission module is used for emitting laser and generating a first optical signal and a second optical signal; the photoelectric oscillator module is used for generating a starting mode of the photoelectric oscillator and outputting a first electric signal; the phase-locked loop module is used for stabilizing the starting frequency of the starting mode of the photoelectric oscillator; the ultra-weak frequency deviation signal detection module is used for acquiring an ultra-weak frequency deviation optical signal to be detected and a second optical signal, generating a beat frequency signal, and feeding back to the photoelectric oscillator module with frequency deviation information; the phase-locked loop module moves the first electric signal after the phase and the beat frequency signal output by the ultra-weak frequency deviation signal detection module are coupled to the photoelectric oscillator module to obtain ultra-weak frequency deviation signal information. The method realizes the detection of the ultra-weak frequency offset signals with high refresh rate, high resolution and high sensitivity, and has strong electromagnetic interference resistance.
Description
Technical Field
The invention relates to the field of ultra-weak frequency offset signal detection, in particular to an ultra-weak frequency offset signal detection system and method based on a photoelectric oscillator.
Background
With the rapid development of communication technology, more and more fields strengthen the importance of frequency offset signal detection technology. Frequency offset signal detection is particularly important because the frequency offset between signals carries a lot of information. In addition, due to power limitation, urgent demands are put on ultra-weak frequency offset signal detection technology in some fields such as radar, medical treatment, internet of things, precise instrument control, micro physics and the like. Therefore, the development of the research on the ultra-weak frequency deviation signal detection technology has important scientific significance and practical requirements. Solving the problem will strongly promote the development of various fields and make contribution to the national economy development.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an ultra-weak frequency deviation signal detection system and method based on a photoelectric oscillator, wherein the ultra-weak frequency deviation signal detection system comprises a laser emitting module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency deviation signal detection module. The detection of the ultra-weak frequency offset signals with high refresh rate, high resolution and high sensitivity is realized; has the ability to respond to ultra-weak signals; a larger frequency offset range can be detected; the requirements on the output power and the line width of the laser are lower, and a richer mode and more flexible spectral data analysis selection are provided for the detection of the ultra-weak frequency offset signal.
In order to achieve the above technical object, the present invention provides an ultra-weak frequency offset signal detection system based on an optoelectronic oscillator, including: the device comprises a laser emitting module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency deviation signal detection module;
the laser emission module is used for emitting laser and generating a first optical signal and a second optical signal;
the photoelectric oscillator module is used for acquiring a first optical signal, obtaining a starting mode of the photoelectric oscillator and outputting a first electric signal at the same time;
the phase-locked loop module is used for stabilizing the starting frequency of the starting mode of the photoelectric oscillator;
the ultra-weak frequency deviation signal detection module is used for acquiring an ultra-weak frequency deviation optical signal to be detected and the second optical signal, generating a beat frequency signal, and feeding back the beat frequency signal to the photoelectric oscillator module along with frequency deviation information;
and the phase-locked loop module is coupled with the beat frequency signal output by the ultra-weak frequency deviation signal detection module and the first electric signal after phase movement and the beat frequency signal are coupled to the photoelectric oscillator module to obtain ultra-weak frequency deviation signal information.
Optionally, the laser emitting module includes: a laser and a fiber optic beam splitter;
the laser is connected with the optical fiber beam splitter;
the laser is used for emitting laser;
the optical fiber beam splitter is used for decomposing the laser to obtain a first optical signal and a second optical signal.
Optionally, the optoelectronic oscillator module includes: an electro-optic modulator, a first photodetector, a first electrical amplifier, an electrical filter, and a second electrical amplifier;
the electro-optical modulator, the first photoelectric detector, the first electric amplifier and the electric filter are sequentially connected, and the second electric amplifier is connected with the electro-optical modulator;
the electro-optic modulator is used for modulating the first optical signal;
the first photoelectric detector is used for converting the modulated first optical signal into an electric signal to generate a first electric signal;
the first and second electrical amplifiers are configured to provide gain for the resonant cavity;
the electric filter is used for providing a starting frequency.
Optionally, the phase-locked loop module includes: a voltage-controlled phase shifter, a phase-locked loop circuit and a loop filter circuit;
the voltage-controlled phase shifter is connected with the loop filter circuit, and the phase-locked loop circuit is connected with the loop filter circuit;
the voltage-controlled phase shifter is used for shifting the phase of the first electric signal;
the phase-locked loop circuit is used for analyzing the frequency and the phase of the first electric signal;
the loop filter circuit is used for filtering the shunt electric signal of the first electric signal after phase shifting.
Optionally, the ultra-weak frequency offset signal detection module includes: the optical fiber beam combiner, the second photoelectric detector and the phase shifter;
the optical fiber beam combiner, the second photoelectric detector and the phase shifter are sequentially connected;
the optical fiber beam combiner is used for combining the second optical signal and the ultra-weak frequency deviation optical signal to be detected to generate a combined optical signal;
the second photoelectric detector is used for converting the beam-combining optical signal into an electric signal and generating the beat frequency signal;
the phase shifter is used for adjusting the phase of the beat signal.
Optionally, the phase-locked loop module stabilizes the oscillation starting frequency of the oscillation starting mode of the optoelectronic oscillator by stabilizing the cavity length of the resonant cavity of the optoelectronic oscillator.
Optionally, the device further comprises a power divider, wherein the power divider is used for dividing the first electric signal after phase shifting into two paths for output.
Optionally, the system further comprises an electric spectrometer, wherein the electric spectrometer is used for carrying out frequency offset inversion analysis on the frequency spectrum data of the beat frequency signals to obtain frequency offset information.
The invention also provides an ultra-weak frequency deviation signal detection method based on the photoelectric oscillator, which comprises the following steps:
acquiring a first optical signal to obtain a starting mode of the photoelectric oscillator, and outputting a first electric signal at the same time;
obtaining an ultra-weak frequency offset optical signal to be detected and a second optical signal to generate a beat frequency signal,
and carrying out frequency spectrum analysis based on the first electric signal after phase shifting and the beat frequency signal to obtain ultra-weak frequency deviation signal information.
Optionally, the calculation expression of each frequency in the spectrum analysis is:
|f 1 -f 0 |＝f OEO
wherein f 1 For the frequency f of the ultra-weak frequency offset optical signal to be detected 0 To input the frequency of the laser, f OEO Is the oscillation starting frequency of the photoelectric oscillator.
Optionally, the calculation formula of the information of the ultra-weak frequency deviation signal is:
f 1 ＝|f 0 -f OEO |
wherein f 1 For the frequency f of the ultra-weak frequency offset optical signal to be detected 0 To input the frequency of the laser, f OEO Is the oscillation starting frequency of the photoelectric oscillator.
The invention has the following technical effects:
1. the invention realizes the detection of the ultra-weak frequency offset signals with high refresh rate, high resolution and high sensitivity;
2. the invention has the performance of responding to the ultra-weak frequency deviation signal through the amplification effect of the local oscillation mode of the resonant cavity, has high detection sensitivity on the detection of the ultra-weak frequency deviation signal, and even has single photon detection capability;
3. according to the invention, the frequency of the oscillation starting frequency of the resonant cavity of the photoelectric oscillator (optoelectronic oscillator, OEO) is flexibly adjusted to match the frequency mismatch between the ultra-weak frequency offset signal and the laser, so that the frequency shift detection range is improved;
4. the invention has high refresh rate under the condition of frequency change of the signal to be detected, simplifies the problem of huge data processing in the middle and later period of the existing ultra-weak frequency deviation signal detection, and has stable system, and the ultra-weak frequency deviation signal detection module adopts an optical fiber structure and has strong electromagnetic interference resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an ultra-weak frequency offset signal detection system based on an optoelectronic oscillator according to an embodiment of the present invention;
FIG. 2 is a flowchart of an ultra-weak frequency offset signal detection method based on an optoelectronic oscillator according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an ultra-weak frequency offset signal detection system based on a photoelectric oscillator according to a third embodiment of the present invention;
in fig. 1: 1. a laser; 2. an optical fiber beam splitter; 3. an electro-optic modulator; 4. a first photodetector; 5. a first electrical amplifier; 6. an electric filter; 7. a voltage-controlled phase shifter; 8. a power divider; 9. an electric coupler; 10. a second electrical amplifier; 11. a phase-locked loop circuit; 12. a loop filter circuit; 13. an optical fiber combiner; 14. a second photodetector; 15. a phase shifter; 16. an electric spectrometer;
in fig. 3: 1. a laser; 2. an optical fiber beam splitter; 3. an electro-optic modulator; 4. a first photodetector; 5. a first electrical amplifier; 6. an electric filter; 7. a voltage-controlled phase shifter; 8. a power divider; 9. an electric coupler; 10. a second electrical amplifier; 11. a phase-locked loop circuit; 12. a loop filter circuit; 17. a phase shifter; 18. an electric spectrometer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the invention discloses an ultra-weak frequency deviation signal detection system based on an optoelectronic oscillator, which comprises: the device comprises a laser emitting module, a photoelectric oscillator module, a phase-locked loop module, an ultra-weak frequency deviation signal detection module, a power divider, an electric coupler and an electric spectrometer;
the laser emission module includes: the laser device comprises a laser 1 and a fiber beam splitter 2, wherein the laser 1 is connected with the fiber beam splitter 2. The laser 1 is used for emitting laser light, and the optical fiber beam splitter 2 is used for decomposing the laser light to obtain a first optical signal and a second optical signal.
The optoelectronic oscillator module includes: the electro-optical modulator 3, the first photoelectric detector 4, the first electric amplifier 5, the electric filter 6 and the second electric amplifier 10 are sequentially connected, and the second electric amplifier 10 is connected with the electro-optical modulator 3. The electro-optical modulator 3 is configured to modulate the first optical signal, the first photodetector 4 is configured to convert the modulated first optical signal into an electrical signal, generate a first electrical signal, the first electrical amplifier 5 and the second electrical amplifier 10 are configured to provide gain for a resonant cavity, and the electrical filter 6 is configured to provide a resonant frequency.
The phase-locked loop module includes: the phase-locked loop circuit comprises a voltage-controlled phase shifter 7, a phase-locked loop circuit 11 and a loop filter circuit 12, wherein the voltage-controlled phase shifter 7 is connected with the loop filter circuit 12, and the phase-locked loop circuit 11 is connected with the loop filter circuit. The voltage-controlled phase shifter 7 is used for shifting the phase of the first electric signal, the phase-locked loop circuit 11 is used for keeping the phase and the oscillation frequency of the photoelectric oscillator synchronous with the input signal, and the loop filter circuit is used for filtering the shunt electric signal of the first electric signal.
The ultra-weak frequency deviation signal detection module comprises: the optical fiber beam combiner 13, the second photoelectric detector 14 and the phase shifter 15 are sequentially connected. The optical fiber combiner 13 is configured to combine the second optical signal and the ultra-weak frequency offset optical signal to be detected to generate a combined optical signal, the second photodetector 14 is configured to convert the combined optical signal into an electrical signal, generate the beat signal, and the phase shifter 15 is configured to adjust a phase of the beat signal.
The power divider 8 is configured to divide the first electric signal after phase shift into two paths for output, and the power divider 8 is connected to the voltage-controlled phase shifter 7 and the phase-locked loop circuit 11 respectively.
The spectrometer 16 is configured to perform frequency offset inversion analysis on the frequency spectrum data detected in the coupling process, so as to obtain frequency offset information; the spectrometer 16 is connected to the second electrical amplifier 10.
The electric coupler 9 is used for coupling the first electric signal output by the phase-locked loop module and the beat frequency signal output by the ultra-weak frequency deviation signal detection module to the photoelectric oscillator module to obtain ultra-weak frequency deviation signal information; the electric coupler 9 is connected to the phase shifter 15, the power divider 8 and the second electric amplifier 10, respectively.
The laser emitted by the laser transmitter 1 sequentially passes through the optical fiber beam splitter 2 and the electro-optical modulator 3 to be modulated, and after photoelectric conversion is realized through the first photoelectric detector 4, the laser sequentially enters the first electric amplifier 5, the electric filter 6, the voltage-controlled phase shifter 7, the power divider 8, the electric coupler 9 and the second electric amplifier 10, and finally is fed back to the resonant cavity of the photoelectric oscillator through the electro-optical modulator 3 to form the photoelectric oscillator.
In the present embodiment, the laser transmitter 1 emits laser light with a wavelength lambda 0 Frequency f 0 The laser light passes through the optical fiber beam splitter 2, and is split into two paths, namely a first optical signal and a second optical signal. The first optical signal enters the electro-optical modulator 3, is modulated by the electro-optical modulator 3, enters the first photoelectric detector 4, converts the modulated first optical signal into a first electric signal, determines the oscillation starting frequency of the system by the electric filter 6, and provides gain for the resonant cavity by the first electric amplifier 5 and the second electric amplifier 10. After passing through the first electric amplifier 5 and the electric filter 6 in turn, the first electric signal enters the voltage-controlled phase shifter 7 to shift the phase of the first electric signal, the first electric signal after shifting the phase enters the power divider 8, the power divider 8 divides the first electric signal after shifting the phase into two paths of electric signals to be output, one path of electric signal enters the electric coupler 9 and enters the second electric amplifier 10, the electric signal output by the second electric amplifier 10 is fed back to the electric light modulator 3 to form a photoelectric oscillator structure, the gain of the system is regulated, the photoelectric oscillator just starts to vibrate, and the starting frequency is f OEO The method comprises the steps of carrying out a first treatment on the surface of the The other path of electric signal enters the phase-locked loop circuit 11, and the phase-locked loop circuit 11 analyzes the frequency and the phase of the electric signal to lead the phase of the electric signal and the oscillation starting frequency f of the photoelectric oscillator OEO The phase-locked loop circuit 11 is connected with the loop filter circuit 12 at its output end, the loop filter circuit 12 is used for filtering the shunt electric signal of the first electric signal, and the filtered error electric signal is fed back and input to the voltage-controlled phase shifter 7 to complete the control of the cavity length of the resonant cavity of the photoelectric oscillator, so as to stabilize the oscillation starting frequency f OEO 。
In the ultra-weak frequency deviation signal detection module, a second optical signal separated by the laser 1 through the optical fiber beam splitter 2 and an ultra-weak frequency deviation optical signal to be detected enter an optical fiber beam combiner 13 together, the optical fiber beam combiner 13 combines the second optical signal and the ultra-weak frequency deviation optical signal to be detected to generate a combined optical signal, the frequency of the ultra-weak frequency deviation optical signal to be detected is unknown, and the frequency is set to be f 1 The output end of the optical fiber combiner 13 is connected with the input end of the second photoelectric detector 14The beam-combining optical signal is converted into an electric signal to obtain a beat signal, and the frequency of the beat signal is f 0 -f 1 The method comprises the steps of carrying out a first treatment on the surface of the The beat frequency signal passes through the phase shifter 15, the phase of the beat frequency signal is adjusted by adjusting the power supply voltage of the phase shifter 15, the beat frequency signal passing through the phase shifter is input into the electric coupler 9 in proper phase, the output end of the electric coupler 9 is connected with the electric spectrometer 16, and the electric spectrometer 16 performs frequency deviation inversion analysis on the detected frequency spectrum data of the beat frequency signal to obtain frequency deviation information.
The electric signal output by the power divider 8 and the beat frequency signal carrying the frequency offset information output by the phase shifter 15 enter the electric coupler 9 at the same time, the electric coupler 9 is used for coupling and injecting the electric signal into the resonant cavity of the photoelectric oscillator, and when the frequency and phase matching conditions are achieved between the signal injected into the resonant cavity of the photoelectric oscillator and the local oscillation mode of the photoelectric oscillator, the amplification of the oscillation starting frequency of the photoelectric oscillator is achieved. Adjusting the oscillation starting frequency of the system, and displaying the oscillation starting frequency f of the photoelectric oscillator on the spectrometer 16 OEO When the power of the oscillator is maximum, the signal injected into the resonant cavity of the photoelectric oscillator and the oscillation starting mode of the photoelectric oscillator meet the conditions of frequency and phase matching, and each frequency meets the following equation: i f 1 -f 0 |＝f OEO 。
Acquiring frequency offset information of the ultra-weak frequency offset signal to be detected relative to laser output by the laser 1, and observing and analyzing frequency spectrum by the spectrometer 16 to obtain finally detected ultra-weak frequency offset signal information, wherein the formula is as follows: f (f) 1 ＝|f 0 -f OEO |。
Example two
Acquiring a first optical signal to obtain a starting mode of the photoelectric oscillator, and outputting a first electric signal at the same time;
obtaining the ultra-weak frequency offset optical signal to be detected and the second optical signal to generate a beat frequency signal,
and carrying out frequency spectrum analysis based on the first electric signal after phase shifting and the beat frequency signal to obtain ultra-weak frequency deviation signal information.
Specifically, in the second embodiment
Step one: laser wave emitted by the laser 1Lambda of length 0 Frequency f 0 Split into a first optical signal and a second optical signal by a fiber splitter 2, wherein the first optical signal is modulated by an electro-optical modulator 3;
step two: the modulated first optical signal then enters a first photoelectric detector 4 to convert the modulated first optical signal into an electric signal, and a first electric signal is generated;
step three: the first electric signal sequentially passes through a first electric amplifier 5, an electric filter 6, a voltage-controlled phase shifter 7, a power divider 8, an electric coupler 9 and a second electric amplifier 10, wherein the electric filter 6 determines the starting frequency of the system, and the first electric amplifier 5 and the second electric amplifier 10 provide gains for the resonant cavity;
step four: the first electric signal after the phase shift output by the second electric amplifier 10 is fed back to the electro-optical modulator 3 to form an electro-optical oscillator structure, the gain of the system is regulated to enable 0E0 to just start oscillation, and the oscillation starting frequency is f OEO ；
Step five: the photoelectric oscillator is coupled and output from the power divider 8, and the power divider 8 divides the first electric signal after phase shifting into two paths;
step six: one electric signal separated by the power divider 8 enters a phase-locked loop circuit 11, and the frequency and the phase of the one electric signal separated by the power divider 8 are analyzed;
step seven: the electric signal of one path separated by the power divider 8 is transmitted to a loop filter circuit 12 and then fed back to the input end of the voltage-controlled phase shifter 7 to complete the control of the OEO cavity length, so as to stabilize the oscillation starting frequency f OEO ；
Step eight: the second optical signal has a frequency f 1 The ultra-weak frequency deviation optical signals to be detected (with unknown frequency) are input to the optical fiber combiner 13 together to generate a combined optical signal;
step nine: transmitting the combined light signal to a second photoelectric detector, and converting the combined light signal into an electric signal to obtain a beat signal with the frequency f 0 -f 1 ；
Step ten: the beat frequency signal passes through the phase shifter 15, and the power supply voltage of the phase shifter 15 is regulated, so that the output beat frequency signal is input to the electric coupler 9 in proper phase;
step eleven: adjusting the oscillation starting frequency of the photoelectric oscillator, and displaying the oscillation starting frequency f of the photoelectric oscillator on the spectrometer 16 OEO When the power of the oscillator is maximum, the signal injected into the resonant cavity of the photoelectric oscillator and the oscillation starting mode of the photoelectric oscillator meet the conditions of frequency and phase matching, and each frequency meets the following equation: i f 1 -f 0 |＝f OEO ；
Step twelve: the method comprises the steps of obtaining frequency offset information of an ultra-weak frequency offset optical signal to be detected relative to laser output by a laser 1, wherein the calculation formula is as follows: f (f) 1 ＝|f 0 -f OEO |。
Example III
As shown in fig. 3, the invention further discloses an ultra-weak frequency offset electric signal detection system based on the photoelectric oscillator, which changes the ultra-weak frequency offset optical signal to be detected in the first embodiment into the ultra-weak frequency offset electric signal to be detected, and can detect the information of the ultra-weak frequency offset electric signal based on the step of the first embodiment.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An ultra-weak frequency offset signal detection system based on an optoelectronic oscillator is characterized by comprising: the device comprises a laser emitting module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency deviation signal detection module;
the laser emission module is used for emitting laser and generating a first optical signal and a second optical signal;
the photoelectric oscillator module is used for acquiring a first optical signal, obtaining a starting mode of the photoelectric oscillator and outputting a first electric signal at the same time;
the phase-locked loop module is used for stabilizing the starting frequency of the starting mode of the photoelectric oscillator;
the ultra-weak frequency deviation signal detection module is used for acquiring an ultra-weak frequency deviation optical signal to be detected and the second optical signal, generating a beat frequency signal, and feeding back the beat frequency signal to the photoelectric oscillator module along with frequency deviation information;
and the phase-locked loop module is coupled with the beat frequency signal output by the ultra-weak frequency deviation signal detection module and the first electric signal after phase movement and the beat frequency signal are coupled to the photoelectric oscillator module to obtain ultra-weak frequency deviation signal information.
2. The system for detecting an ultra-weak frequency deviation signal based on an optoelectronic oscillator of claim 1, wherein the laser emitting module comprises: a laser and a fiber optic beam splitter;
the laser is connected with the optical fiber beam splitter;
the laser is used for emitting laser;
the optical fiber beam splitter is used for decomposing the laser to obtain a first optical signal and a second optical signal.
3. The system for detecting an ultra-weak frequency deviation signal based on an optoelectronic oscillator of claim 1, wherein the optoelectronic oscillator module comprises: an electro-optic modulator, a first photodetector, a first electrical amplifier, an electrical filter, and a second electrical amplifier;
the electro-optical modulator, the first photoelectric detector, the first electric amplifier and the electric filter are sequentially connected, and the second electric amplifier is connected with the electro-optical modulator;
the electro-optic modulator is used for modulating the first optical signal;
the first photoelectric detector is used for converting the modulated first optical signal into an electric signal to generate a first electric signal;
the first and second electrical amplifiers are configured to provide gain for the resonant cavity;
the electric filter is used for providing a starting frequency.
4. The system for detecting an ultra-weak frequency deviation signal based on an optoelectronic oscillator of claim 1, wherein the phase-locked loop module comprises: a voltage-controlled phase shifter, a phase-locked loop circuit and a loop filter circuit;
the voltage-controlled phase shifter is connected with the loop filter circuit, and the phase-locked loop circuit is connected with the loop filter circuit;
the voltage-controlled phase shifter is used for shifting the phase of the first electric signal;
the phase-locked loop circuit is used for analyzing the frequency and the phase of the first electric signal;
the loop filter circuit is used for filtering the shunt electric signal of the first electric signal after phase shifting.
5. The system for detecting an ultra-weak frequency deviation signal based on an optoelectronic oscillator according to claim 1, wherein the ultra-weak frequency deviation signal detection module comprises: the optical fiber beam combiner, the second photoelectric detector and the phase shifter;
the optical fiber beam combiner, the second photoelectric detector and the phase shifter are sequentially connected;
the optical fiber beam combiner is used for combining the second optical signal and the ultra-weak frequency deviation optical signal to be detected to generate a combined optical signal;
the second photoelectric detector is used for converting the beam-combining optical signal into an electric signal and generating the beat frequency signal;
the phase shifter is used for adjusting the phase of the beat signal.
6. The system of claim 1, wherein the phase-locked loop module stabilizes the oscillation starting frequency of the oscillation starting mode of the optoelectronic oscillator by stabilizing the cavity length of the resonant cavity of the optoelectronic oscillator.
7. The ultra-weak frequency deviation signal detection system based on the photoelectric oscillator according to claim 1, further comprising an electric spectrometer, wherein the electric spectrometer is used for performing frequency deviation inversion analysis on the frequency spectrum data of the beat frequency signal to obtain frequency deviation information.
8. The ultra-weak frequency deviation signal detection method based on the photoelectric oscillator is characterized by comprising the following steps of:
acquiring a first optical signal to obtain a starting mode of the photoelectric oscillator, and outputting a first electric signal at the same time;
obtaining an ultra-weak frequency offset optical signal to be detected and a second optical signal to generate a beat frequency signal,
performing spectrum analysis based on the first electric signal after phase shifting and the beat frequency signal to obtain ultra-weak frequency offset signal information;
the calculation expression of each frequency in the spectrum analysis is as follows:
|f 1 -f 0 |＝f OEO
wherein f 1 For the frequency f of the ultra-weak frequency offset optical signal to be detected 0 To input the frequency of the laser, f OEO The oscillation starting frequency of the photoelectric oscillator;
the calculation formula of the ultra-weak frequency offset signal information is as follows:
f 1 ＝|f 0 -f OEO |
wherein f 1 For the frequency f of the ultra-weak frequency offset optical signal to be detected 0 To input the frequency of the laser, f OEO The oscillation starting frequency of the photoelectric oscillator;
the laser emits laser with wavelength lambda 0 Frequency f 0 Dividing the optical fiber into a first optical signal and a second optical signal through an optical fiber beam splitter, wherein the first optical signal is modulated by an electro-optical modulator;
modulating the first optical signal, then entering a first photoelectric detector, converting the modulated first optical signal into an electric signal, and generating a first electric signal;
the first electric signal sequentially passes through a first electric amplifier, an electric filter, a voltage-controlled phase shifter, a power divider, an electric coupler and a second electric amplifier, wherein the electric filter determines the starting frequency of the system, and the first electric amplifier and the second electric amplifier provide gain for the resonant cavity;
the first electric signal after the phase shift output by the second electric amplifier is fed back to the electric light modulator to form an photoelectric oscillator structure, the gain of the regulating system is OEO oscillation, and the oscillation starting frequency is f OEO ；
The photoelectric oscillator is coupled and output from a power divider, and the power divider divides the first electric signal after phase movement into two paths;
one electric signal separated by the power divider enters a phase-locked loop circuit, and the frequency and the phase of the one electric signal separated by the power divider are analyzed;
transmitting one path of electric signal separated by the power divider to a loop filter circuit, and feeding back to the input end of the voltage-controlled phase shifter to complete the control of the OEO cavity length for stabilizing the oscillation starting frequency f OEO ；
The second optical signal and the frequency f 1 The ultra-weak frequency offset optical signals to be detected are input to an optical beam combiner together to generate a combined optical signal;
transmitting the combined light signal to a second photoelectric detector, and converting the combined light signal into an electric signal to obtain a beat signal with the frequency f 0 -f 1 ；
The beat frequency signal passes through the phase shifter, and the power supply voltage of the phase shifter is regulated, so that the output beat frequency signal is input to the electric coupler in phase;
adjusting the oscillation starting frequency of the photoelectric oscillator, and when the power of the oscillation starting frequency of the photoelectric oscillator is displayed on the spectrometer to be maximum, enabling the signals injected into the resonant cavity of the photoelectric oscillator and the oscillation starting mode of the photoelectric oscillator to meet the frequency and phase matching conditions, wherein each frequency meets the following conditions: i f 1 -f 0 |＝f OEO ；
Acquiring frequency offset information of an ultra-weak frequency offset optical signal to be detected relative to laser output laser: f (f) 1 ＝|f 0 -f OEO |。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607132.5A CN115015630B (en) | 2022-05-31 | 2022-05-31 | Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607132.5A CN115015630B (en) | 2022-05-31 | 2022-05-31 | Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115015630A CN115015630A (en) | 2022-09-06 |
| CN115015630B true CN115015630B (en) | 2023-06-09 |
Family
ID=83070281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210607132.5A Active CN115015630B (en) | 2022-05-31 | 2022-05-31 | Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115015630B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905701A (en) * | 1988-06-15 | 1990-03-06 | National Research Development Corporation | Apparatus and method for detecting small changes in attached mass of piezoelectric devices used as sensors |
| JP2006106362A (en) * | 2004-10-05 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical frequency synthesizer and wavelength converter |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7027675B2 (en) * | 2003-09-16 | 2006-04-11 | Hrl Laboratories, Llc | Frequency tuning of photonic oscillator using amplifier bias voltage |
| CN100451667C (en) * | 2007-04-06 | 2009-01-14 | 中国科学院上海光学精密机械研究所 | Photoelectric heterodyne detection circuit |
| CN100567998C (en) * | 2007-12-03 | 2009-12-09 | 中兴通讯股份有限公司 | A kind of system and method for measuring tiny frequency deviation |
| CN103983846A (en) * | 2014-05-28 | 2014-08-13 | 北京邮电大学 | Weak signal detection method based on photoelectric oscillator |
| CN106025786B (en) * | 2016-07-29 | 2019-01-25 | 北京邮电大学 | A kind of optical-electronic oscillator and its frequency-stabilizing method |
| CN108183381A (en) * | 2018-01-16 | 2018-06-19 | 浙江大学 | A kind of high stable optical-electronic oscillator and its method using novel feedback controling mode |
| CN110702985B (en) * | 2018-07-09 | 2020-07-07 | 中国科学院半导体研究所 | Beat frequency type frequency spectrum detecting system |
| CN109842444B (en) * | 2019-03-11 | 2020-12-11 | 中国科学院半导体研究所 | Weak signal detection amplification system and method based on photoelectric oscillator |
| CN109818235B (en) * | 2019-03-21 | 2020-08-25 | 中国科学院半导体研究所 | Weak signal detection amplification system and method based on multimode optoelectronic oscillator |
| CN110518975B (en) * | 2019-08-30 | 2021-10-15 | 中国科学院半导体研究所 | Frequency spectrum detection system |
| CN110531324A (en) * | 2019-08-31 | 2019-12-03 | 天津大学 | A kind of tunable linear FM signal generation system based on optical-electronic oscillator |
| CN110571628B (en) * | 2019-08-31 | 2020-09-15 | 天津大学 | Frequency-tunable photoelectric oscillator system based on electric gain frequency-selecting cavity |
| CN111175574B (en) * | 2020-01-02 | 2021-03-05 | 中国科学院半导体研究所 | Measuring system and measuring method |
| CN111381075B (en) * | 2020-04-16 | 2020-12-11 | 华中科技大学 | Method and device for acquiring frequency offset by utilizing pre-fitting phase-locked frequency difference value |
| CN113839297B (en) * | 2021-09-08 | 2023-04-25 | 电子科技大学 | Photoelectric oscillator based on injection locking effect |
-
2022
- 2022-05-31 CN CN202210607132.5A patent/CN115015630B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905701A (en) * | 1988-06-15 | 1990-03-06 | National Research Development Corporation | Apparatus and method for detecting small changes in attached mass of piezoelectric devices used as sensors |
| JP2006106362A (en) * | 2004-10-05 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical frequency synthesizer and wavelength converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115015630A (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106505403A (en) | A kind of adjustable frequency comb of repetition rate produced based on bulk of optical feedback | |
| CN110401492A (en) | A kind of radio amplitude-modulated signal method of reseptance and amplitude modulation Quantum receiver based on quantum effect | |
| CN106253973B (en) | A kind of long range less fundamental mode optical fibre characteristic measurement method and device | |
| WO2021227265A1 (en) | Device and method for measuring absolute distance by variable synthetic wavelength locked to dynamic sideband | |
| CN109656078A (en) | A kind of Energy-Time tangles two-photon production method | |
| CN109286124B (en) | Laser linewidth compression method and system | |
| CN110186567B (en) | Photon mixing terahertz spectrograph | |
| CN111413317B (en) | Stimulated Raman gas sensing system based on annular optical fiber resonant cavity | |
| CN106768873B (en) | A kind of method and device measuring high-fineness fineness of cavity | |
| CN107727367A (en) | A kind of laser frequency noise measuring method and system | |
| CN111740784B (en) | Microwave photon composite modulation synthesis extremely narrow pulse generation system based on electro-optical modulation | |
| CN110911946B (en) | Comb-distance-adjustable low-phase-noise microwave frequency comb generator | |
| CN103575511A (en) | Device and method for measuring relative intensity noise of laser | |
| CN110657955B (en) | Laser frequency drift measurement method and system based on frequency shift feedback loop | |
| CN114361931B (en) | Ultra-low noise electro-optical frequency comb generating device | |
| JP6604580B2 (en) | Frequency stabilized laser | |
| CN118156949A (en) | Phase domain mode locking photo-generated microwave device and method | |
| CN115015630B (en) | Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator | |
| CN206272058U (en) | A kind of adjustable frequency comb of repetition rate produced based on bulk of optical feedback | |
| Maleki | Optoelectronic oscillators for microwave and mm-wave generation | |
| CN109932851B (en) | Generating device based on arbitrary frequency multiplication signal of coupling type photoelectric oscillation optical frequency comb | |
| CN107543611A (en) | A kind of atomic spectral line detection device and system closed loop time measuring method, the control method of modulating frequency and light-intensity test frequency | |
| CN106771688A (en) | A kind of application method of ultra wide band phase noise measuring system | |
| CN106981814A (en) | The production method of tunable ultra-wideband microwave frequency comb based on semiconductor laser | |
| CN114499670B (en) | Microwave signal processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |