CN115015630A - 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
- CN115015630A CN115015630A CN202210607132.5A CN202210607132A CN115015630A CN 115015630 A CN115015630 A CN 115015630A CN 202210607132 A CN202210607132 A CN 202210607132A CN 115015630 A CN115015630 A CN 115015630A
- Authority
- CN
- China
- Prior art keywords
- signal
- ultra
- frequency
- frequency offset
- 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.)
- Granted
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
Abstract
The invention discloses a system and a method for detecting an ultra-weak frequency offset signal based on a photoelectric oscillator, wherein the method comprises the following steps: the system comprises a laser emission module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency offset signal detection module; the laser emitting 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 oscillation mode of the photoelectric oscillator and outputting a first electric signal; the phase-locked loop module is used for stabilizing the oscillation starting frequency of the oscillation starting mode of the photoelectric oscillator; the ultra-weak frequency offset signal detection module is used for acquiring an ultra-weak frequency offset optical signal to be detected and a second optical signal, generating a beat frequency signal and feeding back the beat frequency signal to the optoelectronic oscillator module with frequency offset information; and the phase-locked loop module is coupled with the first electric signal after phase shifting and the beat frequency signal output by the ultra-weak frequency offset signal detection module to the photoelectric oscillator module to obtain ultra-weak frequency offset signal information. The method realizes the detection of the ultra-weak frequency offset signal with high refresh rate, high resolution and high sensitivity, and has strong anti-electromagnetic interference capability.
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 attention on frequency offset signal detection technology. Since the frequency offset between signals carries much information, the detection of the frequency offset signal is very important. In addition, due to power limitation, the ultra-weak frequency offset signal detection technology is urgently required in certain fields, such as radar, medical treatment, internet of things, precise instrument control, microcosmic physics and the like. Therefore, the research on the ultra-weak frequency offset signal detection technology has important scientific significance and practical requirements. The solution of the problem can powerfully promote the development of various fields and make a contribution to the development of national economy.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a system and a method for detecting an ultra-weak frequency offset signal based on a photoelectric oscillator. The detection of the ultra-weak frequency offset signal with high refresh rate, high resolution and high sensitivity is realized; having 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 richer modes and more flexible spectrum data analysis and 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 a photo-electric oscillator, comprising: the system comprises a laser emission module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency offset signal detection module;
the laser emitting 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 oscillation mode of the photoelectric oscillator, and outputting a first electric signal;
the phase-locked loop module is used for stabilizing the oscillation starting frequency of the oscillation starting mode of the photoelectric oscillator;
the ultra-weak frequency offset signal detection module is used for acquiring an ultra-weak frequency offset 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 by carrying frequency offset information;
the first electric signal after the phase of the phase-locked loop module is shifted and the beat frequency signal output by the ultra-weak frequency offset signal detection module are coupled to the optoelectronic oscillator module to obtain ultra-weak frequency offset signal information.
Optionally, the laser emitting module includes: a laser and a fiber 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 splitting 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 photodetector, the first electrical amplifier and the electrical filter are connected in sequence, and the second electrical amplifier is connected with the electro-optical modulator;
the electro-optical 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 and generating a first electric signal;
the first electrical amplifier and the second electrical amplifier are used for providing gain for the resonant cavity;
the electrical filter is configured to provide a start-up frequency.
Optionally, the phase-locked loop module includes: the device 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 the phase is shifted.
Optionally, the ultra-weak frequency offset signal detecting module includes: the optical fiber combiner, the second photoelectric detector and the phase shifter;
the optical fiber 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 offset optical signal to be detected to generate a combined optical signal;
the second photoelectric detector is used for converting the combined beam optical signal into an electric signal and generating the beat frequency signal;
the phase shifter is used for adjusting the phase of the beat frequency 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 power divider is further included, and the power divider is configured to divide the first electrical signal after the phase shift into two paths for output.
Optionally, the apparatus further includes a spectrometer, and the spectrometer is configured to perform frequency offset inversion analysis on the frequency spectrum data of the beat signal to obtain frequency offset information.
The invention also provides a method for detecting the ultra-weak frequency offset signal based on the photoelectric oscillator, which comprises the following steps:
acquiring a first optical signal, acquiring a starting oscillation mode of the photoelectric oscillator, and outputting a first electric signal;
acquiring a to-be-detected ultra-weak frequency polarization signal and a second optical signal, generating a beat frequency signal,
and carrying out frequency spectrum analysis based on the first electric signal and the beat frequency signal after the phase is shifted to obtain ultra-weak frequency offset signal information.
Optionally, the calculation expression of each frequency in the spectrum analysis is as follows:
|f 1 -f 0 |＝f OEO
wherein f is 1 Frequency, f, of the ultra-weak frequency polarized signal to be detected 0 For the frequency of the input laser, f OEO Is the starting frequency of the optoelectronic oscillator.
Optionally, the calculation formula of the ultra-weak frequency offset signal information is as follows:
f 1 ＝|f 1 -f OEO |
wherein f is 1 Frequency, f, of the ultra-weak frequency polarized signal to be detected 0 For the frequency of the input laser, f OEO Is the starting frequency of the optoelectronic oscillator.
The invention has the following technical effects:
1. the invention realizes the detection of the ultra-weak frequency offset signal with high refresh rate, high resolution and high sensitivity;
2. the invention has the performance of responding to the ultra-weak frequency offset signal by the amplification effect of the resonant cavity local oscillation mode, has very high detection sensitivity to the detection of the ultra-weak frequency offset signal, and even has single photon detection capability;
3. the invention matches the frequency detuning quantity between the ultra-weak frequency offset signal and the laser by flexibly adjusting the oscillation starting frequency of the resonant cavity of the optoelectronic oscillator (OEO), thereby improving the frequency shift detection range;
4. the invention has very high refresh rate under the condition of the frequency change of the signal to be detected, simplifies the problem of huge data processing in the middle and later periods 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 anti-electromagnetic interference capability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic diagram of an ultra-weak frequency offset signal detection system based on a photoelectric oscillator according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for detecting an ultra-weak frequency offset signal based on a photo-oscillator according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a system for detecting an ultra-weak frequency offset signal based on a photo-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 electrical 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 electro-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 electrical 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 electro spectrometer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present invention discloses a system for detecting an ultra-weak frequency offset signal based on a photo-oscillator, which comprises: the system comprises a laser emission module, a photoelectric oscillator module, a phase-locked loop module, an ultra-weak frequency offset signal detection module, a power divider, an electric coupler and an electric spectrometer;
the laser emission module includes: the device comprises a laser 1 and an optical fiber beam splitter 2, wherein the laser 1 is connected with the optical fiber beam splitter 2. The laser 1 is used for emitting laser, and the optical fiber beam splitter 2 is used for decomposing the laser to obtain a first optical signal and a second optical signal.
The optoelectronic oscillator module comprises: the photoelectric detector comprises an electro-optical modulator 3, a first photoelectric detector 4, a first electric amplifier 5, an electric filter 6 and a second electric amplifier 10, wherein the electro-optical modulator 3, the first photoelectric detector 4, the first electric amplifier 5 and the electric filter 6 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 and generate a first electrical signal, the first electrical amplifier 5 and the second electrical amplifier 10 are configured to provide a gain to the resonant cavity, and the electrical filter 6 is configured to provide a start-up frequency.
The phase-locked loop module includes: the voltage-controlled phase shifter 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 electrical signal, the phase-locked loop circuit 11 is used for keeping the phase and the oscillation starting frequency of the photoelectric oscillator synchronous with the input signal, and the loop filter circuit is used for filtering the shunt electrical signal of the first electrical signal.
The ultra-weak frequency offset signal detection module comprises: the optical fiber coupler comprises an optical fiber combiner 13, a second photoelectric detector 14 and a phase shifter 15, wherein the optical fiber combiner 13, the second photoelectric detector 14 and the phase shifter 15 are connected in sequence. 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 to 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 electrical signal after the 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 to obtain frequency offset information; the spectrometer 16 is connected to the second electrical amplifier 10.
The electric coupler 9 is configured to couple the first electrical signal output by the phase-locked loop module and the beat signal output by the ultra-weak frequency offset signal detection module to the optoelectronic oscillator module to obtain ultra-weak frequency offset 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 emitter 1 passes through the optical fiber beam splitter 2 and the electro-optical modulator 3 in sequence to complete modulation, and after photoelectric conversion is realized by the first photoelectric detector 4, the laser 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 in sequence, and finally the laser is fed back to the resonant cavity of the electro-optical oscillator through the electro-optical modulator 3 to form the electro-optical oscillator.
In the present embodiment, the laser emitter 1 emits a laser wavelength λ 0 Frequency of 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 an electro-optical modulator 3, is modulated by the electro-optical modulator 3, enters a first photoelectric detector 4, converts the modulated first optical signal into a first electric signal, an electric filter 6 determines the oscillation starting frequency of the system, and a first electric amplifier 5 and a second electric amplifier 10 provide gain for the resonant cavity. The first electrical signal enters a voltage-controlled phase shifter 7 to shift the phase of the first electrical signal after passing through a first electrical amplifier 5 and an electrical filter 6 in sequence, the first electrical signal after shifting the phase enters a power divider 8, the power divider 8 divides the first electrical signal after shifting the phase into two paths of electrical signals to be output, one path of electrical signal enters an electric coupler 9 and enters a second electrical amplifier 10, the electrical signal output by the second electrical amplifier 10 is fed back to the electro-optical modulator 3 to form a photoelectric oscillator structure, the gain of the system is adjusted, the photoelectric oscillator just starts oscillation, and the oscillation starting frequency is f OEO (ii) a Another electric signal goesThe phase-locked loop circuit 11 analyzes the frequency and phase of the electric signal to make the phase and the oscillation starting frequency f of the photoelectric oscillator OEO The phase-locked loop circuit 11 has an output end connected to a loop filter circuit 12, the loop filter circuit 12 is used for filtering the first electrical signal, and the filtered error electrical signal is fed back to the voltage-controlled phase shifter 7 to control the length of the resonant cavity of the optoelectronic oscillator, so as to stabilize the oscillation frequency f OEO 。
In the ultra-weak frequency offset signal detection module, a second optical signal and an ultra-weak frequency polarized signal to be detected, which are split by a laser 1 through an optical fiber beam splitter 2, enter an optical fiber beam combiner 13 together, the optical fiber beam combiner 13 combines the second optical signal and the ultra-weak frequency polarized signal to be detected to generate a combined optical signal, the frequency of the ultra-weak frequency offset optical signal to be detected is unknown and is set as f1, the output end of the optical fiber beam combiner 13 is connected with the input end of a second photoelectric detector 14, the combined optical signal is converted into an electrical signal to obtain a beat frequency signal, and the beat frequency signal has the frequency of f 0 -f 1 (ii) a 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, so that the beat frequency signal passing through the phase shifter is input to the electric coupler 9 in a proper phase, the output end of the electric coupler 9 is connected with the electric spectrum instrument 16, and the electric spectrum instrument 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 signal carrying the frequency deviation information output by the phase shifter 15 enter the electric coupler 9 at the same time, and are coupled and injected into the resonant cavity of the optoelectronic oscillator through the electric coupler 9, and when the signal injected into the resonant cavity of the optoelectronic oscillator and the local oscillation mode of the optoelectronic oscillator reach the frequency and phase matching condition, the amplification of the oscillation starting frequency of the optoelectronic oscillator is realized. Adjusting the oscillation-starting frequency of the system, when the oscillation-starting frequency f of the optoelectronic oscillator is displayed on the spectrometer 16 OEO When the power of the oscillator is maximum, the signal injected into the resonant cavity of the optoelectronic oscillator and the oscillation starting mode of the optoelectronic oscillator meet the conditions of frequency and phase matching, and each frequency is matched with the phase matchingThe ratio satisfies the following equation: l f 1 -f 0 |＝f OEO 。
Obtaining frequency deviation information of the ultra-weak frequency deviation signal to be detected relative to laser output by the laser 1, observing and analyzing a frequency spectrum by the spectrometer 16 to obtain finally detected ultra-weak frequency deviation signal information, wherein the formula is as follows: f. of 1 ＝|f 1 -f OEO |。
Example two
Acquiring a first optical signal, acquiring a starting oscillation mode of the photoelectric oscillator, and outputting a first electric signal;
acquiring an ultra-weak frequency offset optical signal to be detected and the second optical signal, generating a beat frequency signal,
and carrying out frequency spectrum analysis based on the first electric signal and the beat frequency signal after the phase is shifted to obtain ultra-weak frequency offset signal information.
Specifically, in the second embodiment
The method comprises the following steps: the laser 1 emits a laser wavelength λ 0 Frequency of f 0 Split into a first optical signal and a second optical signal by an optical fiber beam 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 photodetector 4 to convert the modulated first optical signal into an electrical signal, and a first electrical 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 oscillation starting frequency of the system, and the first electric amplifier 5 and the second electric amplifier 10 provide gain for the resonant cavity;
step four: the first electric signal after phase shifting output by the second electric amplifier 10 is fed back to the electro-optical modulator 3 to form an electro-optical oscillator structure, and the gain of the system is adjusted to make the OEO start oscillation exactly, wherein the start oscillation 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 with the phase shifted into two paths;
step six: one of the paths of electric signals divided by the power divider 8 enters a phase-locked loop circuit 11, and the frequency and the phase of the one of the paths of electric signals divided by the power divider 8 are analyzed;
step seven: one of the electric signals divided 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 length of the OEO cavity, 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 polarized signals to be detected (with unknown frequency) are jointly input into an optical fiber beam combiner 13 to generate beam-combining optical signals;
step nine: transmitting the beam combination optical signal to a second photoelectric detector, converting the beam combination optical signal into an electric signal to obtain a beat frequency signal with the frequency f 0 -f 1 ；
Step ten: the beat frequency signal passes through a phase shifter 15, the power supply voltage of the phase shifter 15 is adjusted, and the output beat frequency signal is input to an electric coupler 9 in a proper phase;
step eleven: adjusting the oscillation frequency of the optoelectronic oscillator, and displaying the oscillation frequency f of the optoelectronic oscillator on the spectrometer 16 OEO When the power of the oscillator is maximum, the oscillation starting mode of the signal injected into the resonant cavity of the optoelectronic oscillator and the optoelectronic oscillator meets the conditions of frequency and phase matching, and each frequency meets the following equation: l f 1 -f 0 |＝f OEO ；
Step twelve: acquiring frequency deviation information of the ultra-weak frequency polarized signal to be detected relative to laser output by the laser 1, wherein the calculation formula is as follows: f. of 1 ＝|f 1 -f OEO |。
EXAMPLE III
As shown in fig. 3, the present invention further discloses a system for detecting an ultra-weak frequency offset electrical signal based on a photoelectric oscillator, wherein an ultra-weak frequency offset optical signal to be detected in the first embodiment is changed into an ultra-weak frequency offset electrical signal to be detected, and information of the ultra-weak frequency offset electrical signal can be detected based on the steps of the first embodiment.
The foregoing shows and describes the general 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, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An ultra-weak frequency offset signal detection system based on a photoelectric oscillator is characterized by comprising: the system comprises a laser emission module, a photoelectric oscillator module, a phase-locked loop module and an ultra-weak frequency offset signal detection module;
the laser emitting 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 oscillation mode of the photoelectric oscillator, and outputting a first electric signal;
the phase-locked loop module is used for stabilizing the oscillation starting frequency of the oscillation starting mode of the photoelectric oscillator;
the ultra-weak frequency offset signal detection module is used for acquiring an ultra-weak frequency offset 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 by carrying frequency offset information;
the first electric signal after the phase of the phase-locked loop module is shifted and the beat frequency signal output by the ultra-weak frequency offset signal detection module are coupled to the optoelectronic oscillator module to obtain ultra-weak frequency offset signal information.
2. The system for detecting ultra-weak frequency offset signal based on optoelectronic oscillator of claim 1, wherein said laser emitting module comprises: a laser and a fiber 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 splitting the laser to obtain a first optical signal and a second optical signal.
3. The system of claim 1, wherein the optoelectronic oscillator module comprises: the photoelectric modulator, the first photoelectric detector, the first electric amplifier, the electric filter and the second electric amplifier;
the electro-optical modulator, the first photodetector, the first electrical amplifier and the electrical filter are connected in sequence, and the second electrical amplifier is connected with the electro-optical modulator;
the electro-optical 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 and generating a first electric signal;
the first electrical amplifier and the second electrical amplifier are used for providing gain for the resonant cavity;
the electrical filter is configured to provide a start-up frequency.
4. The system of claim 1, wherein the phase-locked loop module comprises: the circuit 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 the phase is shifted.
5. The system of claim 1, wherein the ultra-weak frequency offset signal detection module comprises: the optical fiber combiner, the second photoelectric detector and the phase shifter;
the optical fiber 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 offset optical signal to be detected to generate a combined optical signal;
the second photoelectric detector is used for converting the beam combination optical signal into an electric signal and generating the beat frequency signal;
the phase shifter is used for adjusting the phase of the beat frequency signal.
6. The system according to claim 1, wherein the phase-locked loop module stabilizes the oscillation frequency of the oscillation start mode of the optoelectronic oscillator by stabilizing the cavity length of the resonant cavity of the optoelectronic oscillator.
7. The system for detecting the ultra-weak frequency offset signal based on the optoelectronic oscillator according to claim 1, further comprising an electronic spectrometer, wherein the electronic spectrometer is configured to perform frequency offset inversion analysis on the frequency spectrum data of the beat signal to obtain frequency offset information.
8. A method for detecting an ultra-weak frequency offset signal based on a photoelectric oscillator is characterized by comprising the following steps:
acquiring a first optical signal, acquiring a starting oscillation mode of the photoelectric oscillator, and outputting a first electric signal;
acquiring a to-be-detected ultra-weak frequency polarization signal and a second optical signal, generating a beat frequency signal,
and carrying out frequency spectrum analysis based on the first electric signal and the beat frequency signal after the phase is shifted to obtain ultra-weak frequency offset signal information.
9. The method for detecting ultra-weak frequency offset signal based on optoelectronic oscillator of claim 8, wherein the computational expression of each frequency in the spectrum analysis is:
|f 1 -f 0 |＝f OEO
wherein f is 1 Frequency, f, of the ultra-weak frequency polarized signal to be detected 0 For the frequency of the input laser, f OEO Is the starting frequency of the optoelectronic oscillator.
10. The method for detecting ultra-weak frequency offset signal based on optoelectronic oscillator of claim 8, wherein the calculation formula of the ultra-weak frequency offset signal information is:
f 1 ＝|f 1 -f OEO |
wherein f is 1 Frequency, f, of the ultra-weak frequency polarized signal to be detected 0 For the frequency of the input laser, f OEO Is the oscillation starting frequency of the photoelectric oscillator.
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 true CN115015630A (en) | 2022-09-06 |
| CN115015630B 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 (17)
| 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 |
| US20050057791A1 (en) * | 2003-09-16 | 2005-03-17 | Keyvan Sayyah | Frequency tuning of photonic oscillator using amplifier bias voltage |
| JP2006106362A (en) * | 2004-10-05 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical frequency synthesizer and wavelength converter |
| CN101042416A (en) * | 2007-04-06 | 2007-09-26 | 中国科学院上海光学精密机械研究所 | Photoelectric heterodyne detection circuit |
| CN101183124A (en) * | 2007-12-03 | 2008-05-21 | 中兴通讯股份有限公司 | 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 |
| CN106025786A (en) * | 2016-07-29 | 2016-10-12 | 北京邮电大学 | Photoelectric oscillator and frequency stabilization method thereof |
| 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 |
| CN109818235A (en) * | 2019-03-21 | 2019-05-28 | 中国科学院半导体研究所 | Infant laser signal detection amplification system and method based on multimode optical-electronic oscillator |
| CN109842444A (en) * | 2019-03-11 | 2019-06-04 | 中国科学院半导体研究所 | Infant laser signal detection amplification system and method based on optical-electronic oscillator |
| 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 |
| CN110571628A (en) * | 2019-08-31 | 2019-12-13 | 天津大学 | Frequency-tunable photoelectric oscillator system based on electric gain frequency-selecting cavity |
| CN110702985A (en) * | 2018-07-09 | 2020-01-17 | 中国科学院半导体研究所 | Beat frequency type frequency spectrum detecting system |
| CN111175574A (en) * | 2020-01-02 | 2020-05-19 | 中国科学院半导体研究所 | Measuring system and measuring method |
| CN111381075A (en) * | 2020-04-16 | 2020-07-07 | 华中科技大学 | Method and device for acquiring frequency offset by utilizing pre-fitting phase-locked frequency difference value |
| US20210063452A1 (en) * | 2019-08-30 | 2021-03-04 | Institute Of Semiconductors, Chinese Academy Of Sciences | Frequency spectrum detection system |
| CN113839297A (en) * | 2021-09-08 | 2021-12-24 | 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 (17)
| 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 |
| US20050057791A1 (en) * | 2003-09-16 | 2005-03-17 | Keyvan Sayyah | Frequency tuning of photonic oscillator using amplifier bias voltage |
| JP2006106362A (en) * | 2004-10-05 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical frequency synthesizer and wavelength converter |
| CN101042416A (en) * | 2007-04-06 | 2007-09-26 | 中国科学院上海光学精密机械研究所 | Photoelectric heterodyne detection circuit |
| CN101183124A (en) * | 2007-12-03 | 2008-05-21 | 中兴通讯股份有限公司 | 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 |
| CN106025786A (en) * | 2016-07-29 | 2016-10-12 | 北京邮电大学 | Photoelectric oscillator and frequency stabilization method thereof |
| 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 |
| CN110702985A (en) * | 2018-07-09 | 2020-01-17 | 中国科学院半导体研究所 | Beat frequency type frequency spectrum detecting system |
| CN109842444A (en) * | 2019-03-11 | 2019-06-04 | 中国科学院半导体研究所 | Infant laser signal detection amplification system and method based on optical-electronic oscillator |
| CN109818235A (en) * | 2019-03-21 | 2019-05-28 | 中国科学院半导体研究所 | Infant laser signal detection amplification system and method based on multimode optical-electronic oscillator |
| US20210063452A1 (en) * | 2019-08-30 | 2021-03-04 | Institute Of Semiconductors, Chinese Academy Of Sciences | 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 |
| CN110571628A (en) * | 2019-08-31 | 2019-12-13 | 天津大学 | Frequency-tunable photoelectric oscillator system based on electric gain frequency-selecting cavity |
| CN111175574A (en) * | 2020-01-02 | 2020-05-19 | 中国科学院半导体研究所 | Measuring system and measuring method |
| CN111381075A (en) * | 2020-04-16 | 2020-07-07 | 华中科技大学 | Method and device for acquiring frequency offset by utilizing pre-fitting phase-locked frequency difference value |
| CN113839297A (en) * | 2021-09-08 | 2021-12-24 | 电子科技大学 | Photoelectric oscillator based on injection locking effect |
Non-Patent Citations (2)
| Title |
|---|
| 刘莉等: "基于光电振荡器结合电选频腔产生线性调频信号", 《激光与光电子学进展》, vol. 57, no. 3, pages 1 * |
| 毛新丹等: "基于微波锁模的超低噪声微波频率梳的产生", 《激光与光电子学进展》, vol. 59, no. 5, pages 1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115015630B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110034758B (en) | Injection locking millimeter wave frequency divider based on self-oscillation optical frequency comb and frequency dividing method thereof | |
| CN106505403A (en) | A kind of adjustable frequency comb of repetition rate produced based on bulk of optical feedback | |
| CN109286124B (en) | Laser linewidth compression method and system | |
| CN108332735B (en) | Resonance type fiber-optic gyroscope coherent demodulation system and method based on external beam interference | |
| WO2021227265A1 (en) | Device and method for measuring absolute distance by variable synthetic wavelength locked to dynamic sideband | |
| CN105552706B (en) | A kind of generating means of short-term frequency stability standard | |
| CN110911946B (en) | Comb-distance-adjustable low-phase-noise microwave frequency comb generator | |
| CN114755906B (en) | Atomic beam optical clock with external modulation locking applied to detection light and preparation method thereof | |
| CN114361931B (en) | Ultra-low noise electro-optical frequency comb generating device | |
| JP6604580B2 (en) | Frequency stabilized laser | |
| CN106768873B (en) | A kind of method and device measuring high-fineness fineness of cavity | |
| CN206272058U (en) | A kind of adjustable frequency comb of repetition rate produced based on bulk of optical feedback | |
| CN111740784B (en) | Microwave photon composite modulation synthesis extremely narrow pulse generation system based on electro-optical modulation | |
| CN115015630B (en) | Ultra-weak frequency offset signal detection system and method based on photoelectric oscillator | |
| CN109932851B (en) | Generating device based on arbitrary frequency multiplication signal of coupling type photoelectric oscillation optical frequency comb | |
| CN116667111B (en) | Frequency division oscillator based on light injection and oscillation method | |
| Maleki | Optoelectronic oscillators for microwave and mm-wave generation | |
| CN210693007U (en) | System for inhibiting single-frequency phase noise of laser | |
| Li et al. | Rational number harmonic mode-locked dual-loop optoelectronic oscillator with low supermode noise and low intermodulation distortions | |
| CN115001589A (en) | Frequency divider and frequency dividing method based on cancellation structure photoelectric oscillation loop | |
| CN114284839A (en) | Active mode-locking photoelectric oscillator based on injection locking technology | |
| CN109270029B (en) | Universal NICE-OHMS system for detecting sub-Doppler spectrum | |
| CN114499670B (en) | Microwave signal processing device | |
| CN218586575U (en) | Microwave optical frequency comb generating device | |
| CN112003121B (en) | Ultra-stable microwave generation device based on dual-frequency Fabry-Perot cavity frequency stabilized laser |
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 |