CN202695962U - Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect - Google Patents
Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect Download PDFInfo
- Publication number
- CN202695962U CN202695962U CN 201220374274 CN201220374274U CN202695962U CN 202695962 U CN202695962 U CN 202695962U CN 201220374274 CN201220374274 CN 201220374274 CN 201220374274 U CN201220374274 U CN 201220374274U CN 202695962 U CN202695962 U CN 202695962U
- Authority
- CN
- China
- Prior art keywords
- output
- optical
- microwave
- input
- signal
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model discloses a broadband continuous tunable optoelectronic oscillator based on a stimulated Brillouin scattering effect, and aims to provide the broadband continuous tunable optoelectronic oscillator. According to the utility model, the stimulated Brillouin scattering effect in an optical fiber is used to carry out phase displacement on carrier waves of single sideband modulation optical signals in the optoelectronic oscillator, the change of the phase displacement amount of microwave signals in an optoelectronic oscillator annular chamber is realized through the beat frequency of the carrier waves of the optical modulation signals with a positive first order sideband or the carrier waves with a negative first order sideband in a photodetector position, and at the same time, in cooperating with an adjustable microwave filter, the broadband continuous tunable of the optoelectronic oscillator output signal frequency is finally realized.
Description
Technical field
The utility model relates to the optical-electronic oscillator technical field, refers to especially a kind of broadband continuously adjustable optical-electronic oscillator.
Background technology
High performance microwave source has a wide range of applications in fields such as radar, electronic countermeasures, communication and measurements.Traditional microwave source mainly realized by electron tube or solid state device, has that operating frequency is low, frequency tuning range is narrow and the shortcoming such as noise is large, greatly limited the performance of microwave system.By comparison, optical-electronic oscillator (OEO) can produce the signal of high frequency, low phase noise and high stability as a kind of novel microwave signal generator, be a kind of ideal microwave source.In addition, OEO can also realize the functions such as clock recovery, pattern conversion and time division multiplexing of optical data stream signal, important using value is arranged in optical communication system, thereby caused in the last few years scientific research personnel's extensive concern.
Although OEO can produce the microwave signal of high spectrum purity, high-frequency and high stability, its frequency tuning ability is unsatisfactory.Existing OEO frequency tuning technology can only realize a certain frequency place in more among a small circle continuous tuning or broadband range in discrete tuning, also fail frequency-distributed is tuning and continuous tuning effectively combines, the broadband of realization frequency is adjustable continuously.The continuously adjustable OEO in broadband can not only reduce the demand to the different frequency microwave source, and can improve certainty of measurement and the scope of test, measuring instrument; The more important thing is, when OEO was applied to radar system, the broadband of frequency is adjustable detection performance and the antijamming capability that can promote radar continuously.Therefore, on the basis of giving full play to OEO microwave source low phase noise characteristic, strengthen its frequency tuning performance significant.
OEO generally is a regenerative feedback loop that is made of LASER Light Source, electrooptic modulator, microwave filter, photo-detector (PD), and it utilizes the transmission characteristic of modulator and fibre delay line that continuous light is become microwave signal stable, that frequency spectrum is clean.The various frequency noises that active device produces are at first modulated the continuous light that lasing light emitter sends by electrooptic modulator, laser after the modulation enters PD after through one section fibre delay line and is converted to the signal of telecommunication, then the signal of telecommunication that obtains is amplified, feeds back to after the filtering again the rf inputs of electrooptic modulator.When the phase accumulation amount of microwave signal in loop is
Integral multiple and the gain of acquisition during greater than the ring cavity internal loss, these spectrum components will form stable vibration under circulation repeatedly.Generally, have a plurality of spectrum components to satisfy oscillating condition in the loop, be referred to as oscillation mode, the spectrum intervals of these oscillation modes is equal, and its size is by the amount decision time of delay in the loop.Choose a certain oscillation mode by the band pass filter that uses high Q value, can obtain the microwave signal of high spectrum quality and high stability.Can find out from the operation principle of OEO, realize that the mode of OEO frequency tuning has two kinds: a kind of is to change the phase-shift phase that microwave signal experiences in ring cavity, oscillation mode is changed, and then realize frequency tuning, and this mode can realize the continuous tuning of frequency; Another kind is under other parameter constants, utilize the high Q value band pass filter of different passbands position to choose different oscillation modes and realize frequency tuning, the frequency that this mode obtains is series of discrete value, and tuning range and tuning step-length are determined by the performance of filter.
Because OEO is the oscillator of a kind of light-electricity mixing, thereby both changes and can implement in the light territory the phase-shift phase of microwave signal, also can carry out in electric territory.Calendar year 2001, the people such as S. Huang utilize electric adjustable microwave phase shifter design to go out the adjustable OEO of a kind of frequency, reach 100kHz in the frequency tuning amount of X-band.Although the frequency tuning range that this scheme obtains near mode spacing, is had relatively high expectations to the spectral response curve of filter, need to use the filter with rectangular shape to realize.For reducing the requirement to performance of filter, S. the people such as Fedderwitz utilizes electric microwave phase shifter to realize that the frequency of microwave signal is adjustable in the OEO of double loop structure, this scheme only needs a high pass filter filtering low frequency component, has realized the interior frequency fine tuning of frequency rough mediation ± 5MHz of 100MHz.Although electricity adjustable microwave phase shifter can be realized the accurately adjustable of phase-shift phase, its insertion loss is larger, needs the microwave amplifier of relatively high power to carry out power back-off, and this will obviously increase the phase noise of signal.For this reason, the scientific research personnel transfers to microwave phase shift scheme based on photon technology with sight, to giving full play to the characteristics such as large bandwidth, low-loss and anti-electromagnetic interference of photon technology, improves the Frequency spectrum quality of OEO.S. the people such as Poinsot utilizes the dispersion parameter difference at optical fiber different wave length place, changes the phase-shift phase of microwave signal in ring cavity by choosing different optical wavelength, and then realizes the frequency tuning to microwave signal.This scheme has realized respectively the frequency tuning amount of 130kHz, 650kHz and 1.9MHz at 550MHz, 3GHz and 9GHz place, although greatly increased the frequency continuous tuning coverage, need the adjustable light source in wavelength broadband, and the wavelength tuning range in the experiment reaches 80nm.2009, the phase-shift phase that the people such as E. Shumankher propose to utilize the slower rays device to change microwave signal among the OEO first was to realize frequency tuning.They utilize coherent population oscillation effect (CPO) in the semiconductor optical amplifier (SOA) to realize the phase shift of microwave signal in the experiment, have obtained the frequency tuning amount of 2.5MHz at 10GHz frequency place, and this is the maximum continuous tuning coverage of realizing at present.
To sum up analyze as can be known, want to realize the continuously adjustable OEO in broadband, must on the tuning basis of frequency-distributed, increase the scope of frequency continuous tuning.Traditional OEO frequency continuous tuning scheme makes the electricity consumption microwave phase shifter usually, and electric microwave phase shifter is subjected to bandwidth of operation and insert the restriction of consuming, and is difficult to carry out tuning to high-frequency microwave signal.Therefore, utilize photon technology to realize that the phase shift of microwave signal is the inexorable trend of OEO development of future generation.
The utility model content
The purpose of this utility model is to provide a kind of broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect.
The utility model is for achieving the above object by the following technical solutions:
A kind of broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect is characterized in that comprising:
LASER Light Source (a): its output is connected with optical coupler (c) by the first optical patchcord (b);
Optical coupler (c): its input is connected with LASER Light Source (a) by the first optical patchcord (b), its first output is connected with the light input end of the first electrooptic modulator (e) by the second optical patchcord (d), and its second output port is connected with the light input end of the second electrooptic modulator (p) by the 5th optical patchcord (o);
The first electrooptic modulator (e): its light input end is connected with the first output of optical coupler (c) by the second optical patchcord (d), its light output end is connected with 1 port of the first optical circulator (g) by the 3rd optical patchcord (f), and its electrical input is connected with an output of microwave directive coupler (n);
The first optical circulator (g): its 1 port is connected with the light output end of the first electrooptic modulator (e), and its 2 port is connected with the input of monomode fiber (h);
Monomode fiber (h): its input is connected with 2 ports of its first optical circulator (g), and output is connected with 1 port of the second optical circulator (i);
The second optical circulator (i): its 1 port is connected with the output of monomode fiber (h), its 2 port is connected with the light input end of photo-detector (k) by the 4th optical patchcord (j), and its 3 port is connected with the output of low noise wideband image intensifer (r) by the 7th optical patchcord (s);
Photo-detector (k): its light input end is connected with 2 ports of the second optical circulator (i), and its electric output is connected with the input of low noise wideband microwave amplifier (u);
Low noise wideband microwave amplifier (u): its input is connected with the output of photo-detector (k), and its output is connected with the input of tunable band-pass microwave filter (m);
Tunable band-pass microwave filter (m): its input is connected with the output of low noise wideband microwave amplifier (u); Its output is connected with the input of microwave directive coupler (n);
Microwave directive coupler (n): its input is connected with tunable band-pass microwave filter (m) output, and an one output is connected with the electrical input of the first electrooptic modulator (e), and its another output is electric output;
The second electrooptic modulator (p): its light input end is connected with the second output port of optical coupler (c) by the 5th optical patchcord (o), its electrical input is connected with a microwave signal source (t), and its light output end is connected with the input of low noise wideband image intensifer (r) by six fibers wire jumper (q);
Low noise wideband image intensifer (r): its input is connected by six fibers wire jumper (q) with the light output end of the second electrooptic modulator (p), and its output is connected with 3 ports of the second optical circulator (i) by the 7th optical patchcord (s).
In the such scheme, electrooptic modulator (e) is operated in the single-side band modulation mode, and the concentration of energy of output modulated light signal is at carrier wave and positive single order sideband or carrier wave and negative single order sideband; Electrooptic modulator (p) is operated in the carrier-suppressed double sideband modulation system, and the concentration of energy of output modulated light signal is at positive and negative single order sideband.
In the such scheme, the carrier-suppressed double sideband modulation signal that electrooptic modulator (p) produces enters monomode fiber (h) by the second optical circulator (i), its positive and negative single order sideband produces respectively Brillouin's loss spectra and gain spectral in carrier frequency, the Brillouin's loss spectra that produces and gain spectral will act on the carrier component of electrooptic modulator (e) output signal simultaneously, and on the plus or minus single order sideband of electrooptic modulator (e) output signal without impact.
In the such scheme, regulate the positive and negative single order sideband spacing of carrier-suppressed double sideband modulation signal, can change the stack amount of brillouin gain spectrum and loss spectra, and then realize tuning to the carrier phase amount of electrooptic modulator (e) output modulated light signal, by locate the carrier wave and positive single order sideband or carrier wave and negative single order sideband beat frequency with single sideband modulated signal at photo-detector (k), realize the adjustable continuously of microwave signal phase-shift phase.
In the such scheme, described electrooptic modulator is light intensity modulator, optical phase modulator or light polarization modulator.
In the such scheme, low noise wideband microwave amplifier (u) is gain device, be used for to amplify the microwave signal of photo-detector (k) output, and the open-loop gain that makes the electro-optical feedback loop is greater than 1.
In the such scheme, the electrical input microwave signal frequency of electrooptic modulator (p) is adjustable continuously in the Brillouin shift amount vicinity of monomode fiber (h).
In the such scheme, the single-side band modulation light signal of electrooptic modulator (e) output can be carrier wave and positive single order sideband, also can be carrier wave and negative single order sideband.
Can find out from technique scheme, the utlity model has following beneficial effect:
One, the broadband continuously adjustable OEO that provides of the utility model, utilize stimulated Brillouin scattering effect and single-side belt optical modulations in the optical fiber to realize the microwave photon phase-shifting technique, can realize the frequency tuning to high-frequency microwave signal, tuning range only is subject to the bandwidth of operation of electrooptic modulator (e), photo-detector (k), low noise wideband microwave amplifier (u) and tunable band-pass microwave filter (m).
Two, the broadband continuously adjustable OEO that provides of the utility model, when utilizing brillouin gain spectrum that the carrier-suppressed double sideband light modulating signal produces and loss spectra to change the carrier phase amount of single-side belt light modulating signal among the OEO, only need regulate the positive and negative single order sideband spacing of carrier-suppressed double sideband light modulating signal or intensity and can realize adjustable continuously to the carrier phase amount of single sideband modulated signal, thereby namely realize the adjustable continuously of OEO frequency.
Three, the broadband continuously adjustable OEO that provides of the utility model, single-side band modulation light signal and carrier-suppressed double sideband modulated light signal are from same light source, thereby not being subjected to the impact of optical source wavelength drift when utilizing the carrier-suppressed double sideband modulated light signal that the carrier wave of single-side band modulation light signal is carried out phase shift, system has very high stability.
Description of drawings
Fig. 1 is the structural representation based on the broadband continuously adjustable OEO of stimulated Brillouin scattering effect that the utility model provides; Solid line is the light territory among the figure, and dotted line is electric territory.
Fig. 2 is brillouin gain spectrum and the Brillouin's loss spectra that the positive and negative single order sideband of carrier-suppressed double sideband modulated light signal produces at the carrier wave place of single sideband modulated signal.
Fig. 3 is the phase-shift phase that the positive and negative single order sideband of carrier-suppressed double sideband modulated light signal is introduced at the carrier wave place of single sideband modulated signal.
Among Fig. 2
The carrier frequency of LASER Light Source (a) output,
Be the Brillouin shift amount of monomode fiber (h),
For departing from the size of Brillouin shift amount.
Be the positive single order sideband of single sideband modulated signal,
With
The positive and negative single order sideband of the corresponding carrier-suppressed double sideband modulation signal of difference.The negative single order sideband of carrier-suppressed double sideband modulation signal produces the brillouin gain spectrum, and positive single order sideband produces Brillouin's loss spectra.The gain that the positive and negative single order sideband of carrier-suppressed double sideband modulation signal produces at the carrier wave place of single sideband modulated signal has with loss that amplitude is identical, the characteristic of opposite in sign, thereby the overall gain that the carrier wave of single sideband modulated signal obtains is zero.
The phase-shift curve that the negative single order sideband of the corresponding carrier-suppressed double sideband modulation signal of dotted line produces among Fig. 3, the phase-shift curve that the positive single order sideband of the corresponding carrier-suppressed double sideband modulation signal of solid line produces.At the carrier wave place of single sideband modulated signal, the phase-shift phase size that two phase shift Curves produce is all consistent with symbol, thereby can obtain 2 times phase-shift phase.
Embodiment
For further specifying technology contents of the present utility model, below in conjunction with accompanying drawing the utility model is described further, wherein:
Operation principle of the present utility model is as follows: the continuous light by LASER Light Source (a) output is divided into two paths of signals by optical coupler (c), one road signal experience is by the first electrooptic modulator (e), the 3rd optical patchcord (f), the first optical circulator (g), monomode fiber (h), the second optical circulator (i), the 4th optical patchcord (j), photo-detector (k), low noise wideband microwave amplifier (u), the OEO loop that tunable band-pass microwave filter (m) and microwave directive coupler (n) consist of, signal is single-side band modulation in the light territory, locate by the Carrier And Side Band beat frequency at photo-detector (k), obtain stable microwave signal, and exported by an output port of microwave directive coupler (n); Another road signal is through the 5th optical patchcord (o), the second electrooptic modulator (p), six fibers wire jumper (q) and low noise wideband image intensifer (r) obtain producing the carrier-suppressed double sideband modulation signal of Brillouin scattering effect, and enter in the monomode fiber (h) by the second optical circulator (i), carrier-suppressed double sideband modulation signal and single sideband modulated signal be in opposite directions transmission in optical fiber (h), and the brillouin gain spectrum and the loss spectra that utilize the carrier-suppressed double sideband modulation signal to produce in monomode fiber (h) are realized the phase-shift phase of single sideband modulated signal carrier wave is changed; When the carrier phase amount of single sideband modulated signal changes, the phase-shift phase of locating the microwave signal that beat frequency obtains at photo-detector (k) by carrier component and positive single order sideband or carrier component and negative single order sideband also will change; When signal transmitted the phase-shift phase that obtains and changes in the OEO ring cavity, the frequency that satisfies OEO ring cavity internal resonance condition also changed thereupon, thereby realized the frequency tuning of OEO output microwave signal; Because the Brillouin scattering effect that the carrier-suppressed double sideband modulation signal produces can realize the continuous tuning of single sideband modulated signal carrier phase amount, and maximum phase-shift phase surpasses
, thereby the frequency of output microwave signal can be adjustable continuously in the free spectral range of OEO ring cavity; In conjunction with tunable band-pass microwave filter (m), can realize bandwidth continuously adjustable OEO.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect is characterized in that comprising:
LASER Light Source (a): its output is connected with optical coupler (c) by the first optical patchcord (b);
Optical coupler (c): its input is connected with LASER Light Source (a) by the first optical patchcord (b), its first output is connected with the light input end of the first electrooptic modulator (e) by the second optical patchcord (d), and its second output port is connected with the light input end of the second electrooptic modulator (p) by the 5th optical patchcord (o);
The first electrooptic modulator (e): its light input end is connected with the first output of optical coupler (c) by the second optical patchcord (d), its light output end is connected with 1 port of the first optical circulator (g) by the 3rd optical patchcord (f), and its electrical input is connected with an output of microwave directive coupler (n);
The first optical circulator (g): its 1 port is connected with the light output end of the first electrooptic modulator (e), and its 2 port is connected with the input of monomode fiber (h);
Monomode fiber (h): its input is connected with 2 ports of its first optical circulator (g), and output is connected with 1 port of the second optical circulator (i);
The second optical circulator (i): its 1 port is connected with the output of monomode fiber (h), its 2 port is connected with the light input end of photo-detector (k) by the 4th optical patchcord (j), and its 3 port is connected with the output of low noise wideband image intensifer (r) by the 7th optical patchcord (s);
Photo-detector (k): its light input end is connected with 2 ports of the second optical circulator (i), and its electric output is connected with the input of low noise wideband microwave amplifier (u);
Low noise wideband microwave amplifier (u): its input is connected with the output of photo-detector (k), and its output is connected with the input of tunable band-pass microwave filter (m);
Tunable band-pass microwave filter (m): its input is connected with the output of low noise wideband microwave amplifier (u); Its output is connected with the input of microwave directive coupler (n);
Microwave directive coupler (n): its input is connected with tunable band-pass microwave filter (m) output, and an one output is connected with the electrical input of the first electrooptic modulator (e), and its another output is electric output;
The second electrooptic modulator (p): its light input end is connected with the second output port of optical coupler (c) by the 5th optical patchcord (o), its electrical input is connected with a microwave signal source (t), and its light output end is connected with the input of low noise wideband image intensifer (r) by six fibers wire jumper (q);
Low noise wideband image intensifer (r): its input is connected by six fibers wire jumper (q) with the light output end of the second electrooptic modulator (p), and its output is connected with 3 ports of the second optical circulator (i) by the 7th optical patchcord (s).
2. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: electrooptic modulator (e) is operated in the single-side band modulation mode, and the concentration of energy of output modulated light signal is at carrier wave and positive single order sideband or carrier wave and negative single order sideband; Electrooptic modulator (p) is operated in the carrier-suppressed double sideband modulation system, and the concentration of energy of output modulated light signal is at positive and negative single order sideband.
3. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: the carrier-suppressed double sideband modulation signal that electrooptic modulator (p) produces enters monomode fiber (h) by the second optical circulator (i), its positive and negative single order sideband produces respectively Brillouin's loss spectra and gain spectral in carrier frequency, the Brillouin's loss spectra that produces and gain spectral will act on the carrier component of electrooptic modulator (e) output signal simultaneously, and on the plus or minus single order sideband of electrooptic modulator (e) output signal without impact.
4. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: the positive and negative single order sideband spacing of regulating the carrier-suppressed double sideband modulation signal, change the stack amount of brillouin gain spectrum and loss spectra, and then realize tuning to the carrier phase amount of electrooptic modulator (e) output modulated light signal, by locate the carrier wave and positive single order sideband or carrier wave and negative single order sideband beat frequency with single sideband modulated signal at photo-detector (k), realize the adjustable continuously of microwave signal phase-shift phase.
5. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: described electrooptic modulator is light intensity modulator, optical phase modulator or light polarization modulator.
6. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: low noise wideband microwave amplifier (u) is gain device, be used for to amplify the microwave signal of photo-detector (k) output, and the open-loop gain that makes the electro-optical feedback loop is greater than 1.
7. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1, it is characterized in that: the electrical input microwave signal frequency of electrooptic modulator (p) is adjustable continuously in the Brillouin shift amount vicinity of monomode fiber (h).
8. the broadband continuously adjustable optical-electronic oscillator based on the stimulated Brillouin scattering effect according to claim 1 is characterized in that: the single-side band modulation light signal of electrooptic modulator (e) output is carrier wave and positive single order sideband, or carrier wave and negative single order sideband.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374274 CN202695962U (en) | 2012-07-31 | 2012-07-31 | Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374274 CN202695962U (en) | 2012-07-31 | 2012-07-31 | Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202695962U true CN202695962U (en) | 2013-01-23 |
Family
ID=47551525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220374274 Expired - Fee Related CN202695962U (en) | 2012-07-31 | 2012-07-31 | Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202695962U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751644A (en) * | 2012-07-31 | 2012-10-24 | 西南交通大学 | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect |
| CN103855595A (en) * | 2014-01-24 | 2014-06-11 | 北京邮电大学 | Tunable photoelectric oscillator |
| CN103955028A (en) * | 2014-04-29 | 2014-07-30 | 中国科学院半导体研究所 | Broadband tunable single-passband microwave photon filter generating system |
| CN104993358A (en) * | 2015-07-07 | 2015-10-21 | 中国科学院半导体研究所 | Single-sideband optical carrier microwave signal generating device based on stimulated Brillouin scattering |
| US20180180655A1 (en) * | 2016-09-01 | 2018-06-28 | Imra America, Inc. | Ultra-low noise photonic phase noise measurement system for microwave signals |
| CN108919244A (en) * | 2018-05-18 | 2018-11-30 | 南京航空航天大学 | Microwave photon all band radar detection method and microwave photon all band radar |
| CN111637911A (en) * | 2020-06-08 | 2020-09-08 | 西南交通大学 | BOTDA distributed optical fiber sensor assisted by common-line double-wave interferometer |
| CN114552340A (en) * | 2020-11-24 | 2022-05-27 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
-
2012
- 2012-07-31 CN CN 201220374274 patent/CN202695962U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751644A (en) * | 2012-07-31 | 2012-10-24 | 西南交通大学 | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect |
| CN103855595B (en) * | 2014-01-24 | 2016-06-29 | 北京邮电大学 | A kind of tunable optical electrical oscillator |
| CN103855595A (en) * | 2014-01-24 | 2014-06-11 | 北京邮电大学 | Tunable photoelectric oscillator |
| CN103955028A (en) * | 2014-04-29 | 2014-07-30 | 中国科学院半导体研究所 | Broadband tunable single-passband microwave photon filter generating system |
| CN104993358B (en) * | 2015-07-07 | 2018-07-10 | 中国科学院半导体研究所 | Single-side belt light based on stimulated Brillouin scattering carries microwave signal generation device |
| CN104993358A (en) * | 2015-07-07 | 2015-10-21 | 中国科学院半导体研究所 | Single-sideband optical carrier microwave signal generating device based on stimulated Brillouin scattering |
| US20180180655A1 (en) * | 2016-09-01 | 2018-06-28 | Imra America, Inc. | Ultra-low noise photonic phase noise measurement system for microwave signals |
| CN108919244A (en) * | 2018-05-18 | 2018-11-30 | 南京航空航天大学 | Microwave photon all band radar detection method and microwave photon all band radar |
| CN108919244B (en) * | 2018-05-18 | 2021-01-12 | 南京航空航天大学 | Microwave photon all-band radar detection method and microwave photon all-band radar |
| CN111637911A (en) * | 2020-06-08 | 2020-09-08 | 西南交通大学 | BOTDA distributed optical fiber sensor assisted by common-line double-wave interferometer |
| CN111637911B (en) * | 2020-06-08 | 2021-04-09 | 西南交通大学 | BOTDA distributed optical fiber sensor assisted by common-line double-wave interferometer |
| CN114552340A (en) * | 2020-11-24 | 2022-05-27 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
| CN114552340B (en) * | 2020-11-24 | 2023-09-05 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202695962U (en) | Broadband continuous tunable optoelectronic oscillator based on stimulated Brillouin scattering effect | |
| CN102751644B (en) | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect | |
| WO2020248737A1 (en) | Radio-frequency linear frequency modulation signal generation method and apparatus based on frequency spectrum splicing | |
| WO2019109455A1 (en) | Photon microwave down-conversion device and method | |
| CN108199776B (en) | Microwave photon up-conversion device and method based on photoelectric oscillator | |
| CN103166706B (en) | Based on the photoelectric oscillation device of the frequency-tunable of wide spectrum light source | |
| CN103219632B (en) | Frequency multiplication photoelectric oscillator | |
| CN104216196B (en) | Tunable all-optical microwave photon frequency conversion device without external electric local oscillator | |
| CN108768539B (en) | Photon type microwave frequency-halving method and photon type microwave frequency-halving device | |
| CN102931568B (en) | Photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and method thereof | |
| CN103297145A (en) | Device for generating sixteen-frequency multiplication millimeter waves in full light | |
| CN108988105A (en) | A kind of generation device and its method of the super flat microwave frequency comb in high power broadband | |
| CN102368582A (en) | Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband | |
| CN111082872B (en) | Fourier domain mode-locked photoelectric oscillator based on electronic control frequency sweep and implementation method | |
| CN102403644A (en) | Photonic high order frequency doubling optoelectronic oscillator | |
| CN112165361A (en) | Optical channelization device and method with tunable frequency range | |
| CN104113378A (en) | Apparatus and method capable of tuning microwave signal source of semiconductor optical amplifier | |
| CN111158171A (en) | Large-free spectral range reconfigurable optical frequency comb generation device and implementation method | |
| CN104181748A (en) | Microwave pulse signal generating device based on light-operated nonlinear annular mirror | |
| CN114978332A (en) | Millimeter wave signal generating device and method with tunable frequency and phase | |
| CN104184028A (en) | Self-locking photoelectric oscillator and method thereof | |
| CN101320188B (en) | Photon adjustable broadband radio frequency phase shifter based on silicon based annular resonant cavity | |
| CN106374324A (en) | Tunable frequency-doubled photoelectric oscillator system based on polarization modulator | |
| CN116170084A (en) | Four-wave mixing-based photonic ultra-wideband terahertz frequency hopping source | |
| CN109638621A (en) | KHz magnitude single-pass band microwave photon filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130731 |