CN113098405A - Phase sensitive amplifier based on vacuum compression state injection - Google Patents
Phase sensitive amplifier based on vacuum compression state injection Download PDFInfo
- Publication number
- CN113098405A CN113098405A CN202110368692.5A CN202110368692A CN113098405A CN 113098405 A CN113098405 A CN 113098405A CN 202110368692 A CN202110368692 A CN 202110368692A CN 113098405 A CN113098405 A CN 113098405A
- Authority
- CN
- China
- Prior art keywords
- light
- mirror
- psa
- phase sensitive
- plano
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
Abstract
The invention provides a phase sensitive amplifier based on vacuum compression state injection, which comprises: the device comprises compressed light, pump light, a dichroic mirror, a PSA cavity, a beam splitter and a detection device; the compressed light and the pump light are vertically incident to the dichroic mirror, and are incident to the PSA cavity through the dichroic mirror, phase sensitive amplification is carried out, the compressed light is generated, is coupled with the Local light at the beam splitter, and is detected through a detector; the PSA cavity comprises a first plano-concave mirror, a second plano-concave mirror, a temperature control system and a PPKTP crystal. The invention adopts the all-solid-state continuous laser and takes the compressed light as the input of the phase-sensitive photosensitive parametric amplification, has low noise and good coherence and is beneficial to the presentation of the detailed part of the image information.
Description
Technical Field
The invention belongs to the technical field of optical parametric amplification, and particularly relates to a phase sensitive amplifier based on vacuum compression state injection.
Background
In recent years, with the continuous development of laser technology, the conventional optical amplification technology has been approaching to the quantum limit more and more. The current noise, dark noise, reading noise and the like contained in the traditional photoelectric amplifier restrict the development of weak light amplification technology, and compared with the traditional amplification technology, the phase-sensitive optical parametric amplification technology has the advantages of no introduced noise, high broadband gain and the like. Therefore, the noiseless amplifying capability of the PSA has extremely important application value and prospect in high scattering media, weak light image amplification in astronomical environment and ultrahigh resolution quantum laser radar.
In the past phase-sensitive amplification schemes, pulse lasers are mostly adopted, and the power is relatively high, which puts higher requirements on light sources; on the other hand, in the amplification scheme, the pump light is directly injected into the crystal for amplification, and the crystal placement angle is strict, so that the optimal amplification can be realized only under a specific angle.
Disclosure of Invention
In order to solve the problems, the invention provides a phase-sensitive amplifier based on vacuum compression state injection, which adopts an all-solid-state continuous laser and takes the light in a compression state as the input of phase-sensitive photosensitive parametric amplification, has low noise and good coherence and is beneficial to the presentation of the detailed part of image information.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a phase sensitive amplifier based on vacuum compression state injection, which comprises: the device comprises compressed light, pump light, a dichroic mirror, a PSA cavity, a beam splitter and a detection device;
the compressed light and the pump light are vertically incident to the dichroic mirror, and are incident to the PSA cavity through the dichroic mirror, phase-sensitive amplification is carried out, compressed light is generated, is coupled with Local light at the beam splitter, and is detected through the detection device;
the PSA cavity comprises a first plano-concave mirror, a second plano-concave mirror, a temperature control system and a PPKTP crystal.
Preferably, the diameter of the first plano-concave mirror and the second plano-concave mirror is 10mm, and the curvature radius is 30 mm;
the PPKTP crystals have a size of 1mm by 2mm by 10 mm.
Preferably, the concave surface of the first plano-concave mirror is plated with a high reflection film of 1064nm and a partial transmission film of 532 nm;
the concave surface of the second plano-concave mirror is plated with a 532nm high-reflection film and a 1064nm partial transmission film;
and the planes of the first plano-concave mirror and the second plano-concave mirror are plated with anti-reflection films of 1064 nm.
Preferably, the dichroic mirror is plated with a high-transmittance film of 1064nm and a high-reflection film of 532 nm.
Preferably, the PPKTP crystal is a class i phase-matched crystal; and the PPKTP crystal is placed in a red copper temperature control furnace of the temperature control system for temperature control.
Preferably, the compressed light is 1064nm and the pump light is 532 nm.
Preferably, the amplification process of the phase sensitive amplifier is as follows: the pump light and the compressed light are incident into the PSA cavity through the dichroic mirror, and idler frequency light is generated in the PSA cavity; and when the frequency of the idler frequency light is equal to that of the signal light, phase-sensitive amplification is realized.
Preferably, the detection device comprises 50/50 beam splitter, light guide mirror, concave high reflection mirror and photoelectric tube.
Preferably, the detection process of the detection device is as follows:
the compressed light is output from the PSA cavity, passes through the 50/50 beam splitter, interferes with Local light, is split into two beams of light with equal power, and enters the photoelectric tube through the light guide mirror and the lens with the incidence angle of 25 degrees for detection; and the concave high-reflection mirror injects the residual reflected light into the photoelectric tube again for detection.
The invention discloses the following technical effects:
(1) the invention is based on the all-solid-state continuous laser, has the advantages of low noise, good coherence, dual-wavelength output and the like, can realize noiseless amplification under lower power, and is easier to miniaturize and modularize;
(2) the phase sensitive amplification of the invention has the capability of noiseless amplification, and no extra noise is introduced in the process, thereby realizing the amplification of weak signals;
(3) the invention takes the compressed light as the input of the phase-sensitive optical parametric amplification, and the noise is lower after the amplification, thereby being more beneficial to the presentation of the detailed part of the image information.
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 view of the structure of the apparatus of the present invention.
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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present invention provides a phase sensitive amplifier based on vacuum compression state injection, comprising: the device comprises compressed light, pump light, a dichroic mirror DM, a PSA cavity, a beam splitter BS and a detection device;
the compressed light and the pump light are vertically incident to a dichroic mirror DM, and are incident to a PSA cavity through the dichroic mirror DM for phase-sensitive amplification, the compressed light with 1064nm and another light with 1064nm local are generated after amplification, coupled with a beam splitter BS of 50/50, and amplified through balanced homodyne detection.
The compressed light is 1064nm, and the pump light is 532 nm.
The PSA chamber was constructed as a standing wave optical chamber containing a first M1 and a second M2 plano-concave mirror and a class i phase matched PPKTP crystal of 1mm x 2mm x 10mm size. The two plano-concave mirrors have a diameter of 10mm and a radius of curvature of 30 mm. The concave surface of the first plano-concave mirror M1 is plated with a 1064nm high-reflection film (R is more than 99.8%) and a 532nm partial transmission film (T is 80%), the concave surface of the second plano-concave mirror M2 is plated with a 532nm high-reflection film (R is more than 99.8%) and a 1064nm partial transmission film (T is 13%), and a 1064nm antireflection film is plated on the plane. The dichroic mirror DM is plated with a high-transmittance film of 1064nm and a high-reflection film of 532 nm.
The PPKTP crystal is a class I phase matching crystal; the PPKTP crystal is placed in a red copper temperature control furnace of a temperature control system T-C, the temperature of the crystal is accurately controlled through the temperature control system, and noise-free phase sensitive amplification is carried out through parametric down-conversion.
The detection device comprises an 50/50 beam splitter, a light guide mirror, a concave high-reflection mirror, a detector PD1 and a detector PD 2.
The invention comprises two main parts: one part is a phase sensitive amplifying part, and the other part is a measuring device.
A quantum noise-free phase-sensitive amplifying system, also called optical parametric amplification process, belongs to a three-wave mixing process, utilizes the second-order nonlinear polarization effect of nonlinear crystal to transfer the energy of the incident strong pump light into weak signal light and simultaneously generate idler frequency light with another frequency, and the specific process is a nonlinear difference frequency process, namely the frequency is omegapStrong pump light and frequency of omegasWhen the two incident lights are superposed in time and space, a frequency omega is generated in the nonlinear crystal due to the existence of second-order nonlinear polarizationi＝ωp-ωsThe difference frequency idler of (1). The newly generated idler frequency light is further coupled with the pump light in a nonlinear way and is polarized in a second-order nonlinear wayOf radiation frequency omegas＝ωp-ωiThe signal light of (1). When the frequencies of the pump light and the signal light satisfy omegap＝2ωsTime, i.e. the frequency of the idler light is equal to the frequency (omega) of the signal lights＝ωi) The magnitude of the parametric amplification gain at this time will depend on the input phase of the signal light, which is the phase sensitive optical parametric amplification. Because the pumping light intensity is far greater than the signal light intensity and the idler light intensity initially, the nonlinear difference frequency process is continuously carried out along with the propagation of the optical wave in the nonlinear crystal, the energy of the pumping light is continuously coupled into the signal light and the idler light, so that optical parametric amplification is formed, and no noise is generated additionally.
In a nonlinear process, parametric down-conversion refers to the process of converting one higher frequency photon into two lower frequency photons. The method is characterized in that an all-solid-state continuous single-frequency 1064/532nm dual-wavelength laser is selected as a laser light source, laser noise is further reduced by utilizing a self-developed mode cleaner, and then the laser noise is injected into a PSA (pressure swing adsorption) cavity of an optical parametric amplifier to realize parametric down-conversion. The PSA cavity is a standing wave cavity formed by a class I phase-matched PPKTP crystal and two concave mirrors, and the PPKTP crystal is placed in a red copper temperature control furnace for accurate temperature control, so that the optimal classical gain is realized. When the PSA cavity operates below a threshold, the output light field and background oscillation Light (LO) are coupled on an 50/50 beam splitter BS, and a balanced homodyne detection system is adopted to measure the output light field and the background oscillation Light (LO), and the specific measurement process is as follows: the compressed light is output from the cavity, passes through an 50/50 beam splitter, interferes with local light, is split into two beams of light with equal power, and enters a photoelectric tube of the detection device through a 25-degree incident light guide lens and a lens with proper focal length. The distance between the two arms is ensured to be the same, a pair of concave high-reflection mirrors with proper curvatures is added, the residual reflected light of the photosensitive surface of the photoelectric tube is recovered, and the photoelectric tube is injected again, so that the optical loss of the balanced homodyne detection device is reduced to the minimum.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. A vacuum compression injection based phase sensitive amplifier, comprising: the device comprises compressed light, pump light, a dichroic mirror, a PSA cavity, a beam splitter and a detection device;
the compressed light and the pump light are vertically incident to the dichroic mirror, and are incident to the PSA cavity through the dichroic mirror, phase-sensitive amplification is carried out, compressed light is generated, is coupled with Local light at the beam splitter, and is detected through the detection device;
the PSA cavity comprises a first plano-concave mirror, a second plano-concave mirror, a temperature control system and a PPKTP crystal.
2. The vacuum compressed state injection based phase sensitive amplifier according to claim 1, wherein the first and second plano-concave mirrors have a diameter of 10mm and a radius of curvature of 30 mm;
the PPKTP crystals have a size of 1mm by 2mm by 10 mm.
3. The vacuum compression state injection-based phase sensitive amplifier according to claim 2, wherein the concave surface of the first plano-concave mirror is plated with a high reflective film of 1064nm and a partially transmissive film of 532 nm;
the concave surface of the second plano-concave mirror is plated with a 532nm high-reflection film and a 1064nm partial transmission film;
and the planes of the first plano-concave mirror and the second plano-concave mirror are plated with anti-reflection films of 1064 nm.
4. The vacuum compressive state injection based phase sensitive amplifier of claim 1, wherein the dichroic mirror is coated with a high transmittance film of 1064nm and a high reflectance film of 532 nm.
5. The vacuum compressed state injection based phase sensitive amplifier of claim 1, wherein the PPKTP crystal is a class i phase matched crystal; and the PPKTP crystal is placed in a red copper temperature control furnace of the temperature control system for temperature control.
6. The vacuum compressed state injection based phase sensitive amplifier of claim 1, wherein the compressed light is 1064nm and the pump light is 532 nm.
7. The vacuum compression state injection based phase sensitive amplifier of claim 1, wherein the amplification process of the phase sensitive amplifier is as follows: the pump light and the compressed light are incident into the PSA cavity through the dichroic mirror, and idler frequency light is generated in the PSA cavity; and when the frequency of the idler frequency light is equal to that of the signal light, phase-sensitive amplification is realized.
8. The vacuum compression state injection-based phase sensitive amplifier according to claim 1, wherein the detection device comprises 50/50 beam splitter, light guide mirror, concave high reflection mirror and photoelectric tube.
9. The vacuum compression state injection-based phase sensitive amplifier according to claim 8, wherein the detection process of the detection device is as follows:
the compressed light is output from the PSA cavity, passes through the 50/50 beam splitter, interferes with Local light, is split into two beams of light with equal power, and enters the photoelectric tube through the light guide mirror and the lens with the incidence angle of 25 degrees for detection; and the concave high-reflection mirror injects the residual reflected light into the photoelectric tube again for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368692.5A CN113098405A (en) | 2021-04-06 | 2021-04-06 | Phase sensitive amplifier based on vacuum compression state injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368692.5A CN113098405A (en) | 2021-04-06 | 2021-04-06 | Phase sensitive amplifier based on vacuum compression state injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113098405A true CN113098405A (en) | 2021-07-09 |
Family
ID=76674713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110368692.5A Pending CN113098405A (en) | 2021-04-06 | 2021-04-06 | Phase sensitive amplifier based on vacuum compression state injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113098405A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330760A1 (en) * | 2009-12-03 | 2011-06-08 | University College Cork-National University of Ireland, Cork | Optical amplifier system and method |
| CN105867045A (en) * | 2016-06-16 | 2016-08-17 | 苏州大学 | Optical fiber parameter calculating method and device, full-optical phase regeneration device and PSA |
| CN107561819A (en) * | 2017-09-04 | 2018-01-09 | 山西大学 | A kind of squeezed vacuum state light field generating means and method |
| CN108155946A (en) * | 2017-12-25 | 2018-06-12 | 中原工学院 | More pumping phase-sensitive amplifiers and generation method based on highly nonlinear optical fiber |
| CN110133941A (en) * | 2019-04-28 | 2019-08-16 | 山西大学 | A kind of quasi-continuous quantum Squeezed Vacuum generation device |
-
2021
- 2021-04-06 CN CN202110368692.5A patent/CN113098405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330760A1 (en) * | 2009-12-03 | 2011-06-08 | University College Cork-National University of Ireland, Cork | Optical amplifier system and method |
| CN105867045A (en) * | 2016-06-16 | 2016-08-17 | 苏州大学 | Optical fiber parameter calculating method and device, full-optical phase regeneration device and PSA |
| CN107561819A (en) * | 2017-09-04 | 2018-01-09 | 山西大学 | A kind of squeezed vacuum state light field generating means and method |
| CN108155946A (en) * | 2017-12-25 | 2018-06-12 | 中原工学院 | More pumping phase-sensitive amplifiers and generation method based on highly nonlinear optical fiber |
| CN110133941A (en) * | 2019-04-28 | 2019-08-16 | 山西大学 | A kind of quasi-continuous quantum Squeezed Vacuum generation device |
Non-Patent Citations (1)
| Title |
|---|
| 谢博娅: "光探测和光放大中的额外量子噪声研究", 《中国博士学位论文全文数据库 (基础科学辑)》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Iskhakov et al. | Generation and direct detection of broadband mesoscopic polarization-squeezed vacuum | |
| US8228507B2 (en) | Quantum entanglement generating system and method, and quantum entanglement generating and detecting system and method | |
| JP2012014155A (en) | Terahertz wave generation element, terahertz wave detection element, and terahertz time domain spectral instrument | |
| Wang et al. | Experimental realization of a quantum measurement for intensity difference fluctuation using a beam splitter | |
| US8759779B2 (en) | Terahertz wave generation element, terahertz wave detection element, and terahertz time domain spectral device | |
| CN109632128B (en) | Device and method for measuring double-resonance temperature condition of optical cavity | |
| CN112130396B (en) | Multi-mode receiving miniaturized entanglement source system based on PPKTP crystal | |
| US11493384B1 (en) | Apparatus for single-pixel imaging with quantum light | |
| KR20220163959A (en) | Parametric light generation method and application | |
| CN110568693A (en) | Forecasting single photon generation system and method | |
| CN114300918B (en) | Ultra-stable narrow linewidth laser system and coupling adjustment method | |
| GB2347756A (en) | A radiation source with frequency conversion member and imaging system | |
| CN113098405A (en) | Phase sensitive amplifier based on vacuum compression state injection | |
| CN110895239B (en) | Device and method for measuring excited state absorption heat load in laser gain crystal | |
| CN115683365B (en) | Tunable quantum beat frequency interference device based on quantum frequency up-conversion | |
| CN111123615A (en) | Entanglement source generation device and method based on Michelson interferometer | |
| WO2017120717A1 (en) | Electro-optic phase modulation system | |
| CN116247497A (en) | Medium wave infrared coherent light source based on image rotation 90-degree four-mirror non-planar ring resonant cavity | |
| CN115112232A (en) | THz wave parameter up-conversion detection device based on KTP crystals | |
| CN112540416B (en) | Terahertz pulse up-conversion detection method and system | |
| Skvortsov et al. | Optical frequency standard based on a Nd: YAG laser stabilised by saturated absorption resonances in molecular iodine using second-harmonic radiation | |
| CN110186568B (en) | Photon mixing terahertz wave detection device | |
| CN109143720B (en) | Optical parameter generator for generating multi-beam terahertz waves | |
| Masada | Two-mode squeezed light source for quantum illumination and quantum imaging | |
| CN111262129B (en) | 452nm frequency doubling system with adjustable power and capable of detecting offset |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210709 |