CN106654834A - Single photon source based on total optical fiber femtosecond laser - Google Patents
Single photon source based on total optical fiber femtosecond laser Download PDFInfo
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- CN106654834A CN106654834A CN201710159271.5A CN201710159271A CN106654834A CN 106654834 A CN106654834 A CN 106654834A CN 201710159271 A CN201710159271 A CN 201710159271A CN 106654834 A CN106654834 A CN 106654834A
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- Prior art keywords
- fiber
- optical
- source
- narrow band
- optical circulator
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 87
- 230000003287 optical effect Effects 0.000 claims abstract description 53
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 230000009022 nonlinear effect Effects 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- XFULIUKARWFBDF-UHFFFAOYSA-K erbium(3+);phosphate Chemical compound [Er+3].[O-]P([O-])([O-])=O XFULIUKARWFBDF-UHFFFAOYSA-K 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/395—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves in optical waveguides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
Abstract
The invention provides a single photon source based on a total optical fiber femtosecond laser. The single photon source comprises a femtosecond laser seed source, an optical fiber amplifier, a pumping source, a beam combiner, a gain fiber, a beam splitter, a first optical circulator, a first narrow-band fiber grating, a second optical circulator, a second narrow-band fiber grating, a photoelectric detector, an idle optical channel and a signal optical channel. The single photon source based on the total optical fiber femtosecond laser provided by the invention has the advantages that GHz level high repetition frequency femtosecond laser is obtained by using highly doped erbium phosphate optical fibers and is amplified in a double-coating amplifier, high-intensity entangled photon pairs are obtained by the nonlinear effect, and the photon pairs are separated by using a total optical fiber filtering device so as to obtain the single photon source with a high signal to noise ratio. The structure of the whole device is simple, the dimension is compact, and the performance stability is good.
Description
Technical field
It is more particularly to a kind of based on all-fiber femto-second laser the invention belongs to quantum information processing technology field
Single-photon source.
Background technology
Single-photon source is the light source for only launching a photon.Multi-photon Entangled State, more light can be prepared using single-photon source
Sub- Entangled State is requisite basic resources in quantum calculation and quantum communications；In addition, single-photon source in quantum cryptography and
The quantum information such as linear optics quantum calculation field is also widely used.The generation of single-photon source can be by exciting single transmitting
Particle is produced, such as excitation quantum point, imprison isolate vacancy in monatomic, isolation molecule, the diamond in high-fineness cavity
Deng.Due to this technical requirements temperature it is extremely low, therefore without practical significance.Single-photon source also can be by the associated light of parametric process
Son announces formula single-photon source to producing, referred to as.This kind of parametric process mainly includes being changed based under nonlinear crystal Spontaneous Parametric
Process and the spontaneous four-wave mixing process based on optical fiber Third-order nonlinearity.Using based on optical fiber Third-order nonlinearity from
Send out four-wave mixing process to prepare single-photon source and can realize single-photon source all-fiber so that single-photon source simple structure, it is stable
Property it is high.But still lack such device at present.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of monochromatic light based on all-fiber femto-second laser
Component.
In order to achieve the above object, what the present invention was provided is included based on the single-photon source of all-fiber femto-second laser：Fly
Second laser seed source, fiber amplifier, pumping source, bundling device, gain fibre, beam splitter, the first optical circulator, the first narrow band light
Fine grating, the second optical circulator, the second narrow band fiber bragg grating, photodetector, idle optical channel and signal optical channel；Wherein：
Femtosecond laser seed source is connected by fiber amplifier with bundling device, and pumping source is connected with bundling device, and bundling device leads to
Cross gain fibre to be connected with beam splitter, beam splitter is connected respectively with the first optical circulator and the second optical circulator, the first arrowband
Fiber grating is connected with the first optical circulator, and the second narrow band fiber bragg grating is connected with the second optical circulator, and the first optical circulator leads to
Cross photodetector and idle optical path connection, the second optical circulator and signal optical path connection.
Described femtosecond laser seed source is the femto second optical fiber laser that repetition rate is 5-10GHz, and centre wavelength is
1030nm-1064nm。
Described pumping source, bundling device and gain fibre composition double clad fiber amplifier；Wherein pumping source is 976nm pumpings
Source, power is 50-100W；Gain fibre is the highly doped er-doped phosphate gain fibre of double clad of 20-30 μm of core diameter, and length is
1-2m。
The power amplification multiple of described fiber amplifier is 50 times.
Described the first optical circulator and the first narrow band fiber bragg grating constitutes all-fiber filter, the second optical circulator
With the band that the second narrow band fiber bragg grating constitutes all-fiber filter, the first narrow band fiber bragg grating and the second narrow band fiber bragg grating
A width of 0.5-1nm.
The advantage of the single-photon source based on all-fiber femto-second laser that the present invention is provided is：Using highly doped er-doped
Phosphate optical fiber obtains GHz level Gao Zhongying femtosecond lasers, is then amplified in double clad fiber amplifier, by nonlinear effect
High intensity entangled photon pairs are obtained, and photon pair is separated using all-fiber filter, be derived from high s/n ratio single photon
Source.The simple structure of whole device, compact dimensions, stability is good.
Description of the drawings
The single-photon source structural representation based on all-fiber femto-second laser that Fig. 1 is provided for the present invention.
In figure：
1. the fiber amplifier of femtosecond laser seed source 2.
3. the bundling device of pumping source 4.
5. the beam splitter of gain fibre 6.
7. the narrow band fiber bragg grating of the first optical circulator 8. first
9. the narrow band fiber bragg grating of the second optical circulator 10. second
11. photodetectors 12. leave unused optical channel
13. signal optical channels
Specific embodiment
The single photon based on all-fiber the femto-second laser below in conjunction with the accompanying drawings present invention provided with specific embodiment
Source is described in detail.
As shown in figure 1, the present invention provide included based on the single-photon source of all-fiber femto-second laser：
Femtosecond laser seed source 1, fiber amplifier 2, pumping source 3, bundling device 4, gain fibre 5, beam splitter 6, the first light
It is circulator 7, the first narrow band fiber bragg grating 8, the second optical circulator 9, the second narrow band fiber bragg grating 10, photodetector 11, idle
Optical channel 12 and signal optical channel 13；Wherein：
Femtosecond laser seed source 1 is connected by fiber amplifier 2 with bundling device 4, and pumping source 3 is connected with bundling device 4, closes beam
Device 4 is connected by gain fibre 5 with beam splitter 6, and beam splitter 6 is connected respectively with the first optical circulator 7 and the second optical circulator 9
Connect, the first narrow band fiber bragg grating 8 is connected with the first optical circulator 7, the second narrow band fiber bragg grating 10 connects with the second optical circulator 9
Connect, the first optical circulator 7 is connected by photodetector 11 with idle optical channel 12, the second optical circulator 9 and signal optical channel
13 connections.
Described femtosecond laser seed source 1 is the femto second optical fiber laser that repetition rate is 5-10GHz, and centre wavelength is
1030nm-1064nm。
Described pumping source 3, bundling device 4 and gain fibre 5 composition double clad fiber amplifier；Wherein pumping source 3 is 976nm pumps
Pu source, power is 50-100W；Gain fibre 5 is the highly doped er-doped phosphate gain fibre of double clad of 20-30 μm of core diameter, long
Spend for 1-2m.
The power amplification multiple of described fiber amplifier 2 is 50 times.
Described the first optical circulator 7 and the first narrow band fiber bragg grating 8 constitutes all-fiber filter, and the second light goes in ring
9 and second narrow band fiber bragg grating of device 10 constitutes all-fiber filter, the first narrow band fiber bragg grating 8 and the second narrow band fiber light
The a width of 0.5-1nm of band of grid 10.
The operation principle of the single-photon source based on all-fiber femto-second laser that now present invention is provided is described below：
The repetition rate that femtosecond laser seed source 1 is sent first passes around fiber amplifier 2 for the femtosecond laser of 5-10GHz
50 times of power pre-amplifications are carried out, in being then injected into double clad fiber amplifier, the femtosecond laser after pre-amplification is by double clad fiber amplifier
In amplification process by nonlinear effect affected will produce high intensity entangled photon pairs, when femtosecond laser centre wavelength be 1063nm
When, the respectively idle light 835nm and flashlight 1443nm of wavelength of entangled photon pairs.The subsequent laser beam Jing containing three kinds of wavelength
6 points of beam splitter is two beams, and two separate beam laser are respectively through the first optical circulator 7, the first narrow band fiber bragg grating 8 and the second light
Circulator 9, the second narrow band fiber bragg grating 10 are filtered.The respective wavelength of the first optical circulator 7 and the first narrow band fiber bragg grating 8
For idle light 835nm, the femtosecond laser of 1063nm and the flashlight of 1443nm can be filtered, only retain the idle of 835nm wavelength
Light；The effect of the second optical circulator 9 and the second narrow band fiber bragg grating 10 is the flashlight for only retaining 1443nm.So far, by signal
Light and idle light are selected.The idle light of the 835nm of entangled photons centering and 1443nm flashlights are to produce in pairs simultaneously, work as detection
When leaving unused light pulse to a 835nm, you can the generation of one 1443nm flashlight of indication.Therefore, the 835nm for isolating leaves unused
Light is exported after the detection of photodetector 11 from idle optical channel 12, to indicate the presence of flashlight.The flashlight isolated
Export through signal optical channel 13.
Claims (5)
1. a kind of single-photon source based on all-fiber femto-second laser, it is characterised in that：It is described based on all-fiber femtosecond
The single-photon source of laser instrument includes：Femtosecond laser seed source (1), fiber amplifier (2), pumping source (3), bundling device (4), gain
It is optical fiber (5), beam splitter (6), the first optical circulator (7), the first narrow band fiber bragg grating (8), the second optical circulator (9), second narrow
Band fiber grating (10), photodetector (11), idle optical channel (12) and signal optical channel (13)；Wherein：
Femtosecond laser seed source (1) is connected by fiber amplifier (2) with bundling device (4), and pumping source (3) is with bundling device (4) even
Connect, bundling device (4) is connected by gain fibre (5) with beam splitter (6), beam splitter (6) respectively with the first optical circulator (7) and
Two optical circulators (9) are connected, and the first narrow band fiber bragg grating (8) is connected with the first optical circulator (7), the second narrow band fiber bragg grating
(10) it is connected with the second optical circulator (9), the first optical circulator (7) is connected by photodetector (11) with idle optical channel (12)
Connect, the second optical circulator (9) is connected with signal optical channel (13).
2. the single-photon source based on all-fiber femto-second laser according to claim 1, it is characterised in that：Described flies
Second laser seed source (1) is the femto second optical fiber laser that repetition rate is 5-10GHz, and centre wavelength is 1030nm-1064nm.
3. the single-photon source based on all-fiber femto-second laser according to claim 1, it is characterised in that：Described pump
Pu source (3), bundling device (4) and gain fibre (5) composition double clad fiber amplifier；Wherein pumping source (3) is 976nm pumping sources, work(
Rate is 50-100W；Gain fibre (5) for 20-30 μm of core diameter the highly doped er-doped phosphate gain fibre of double clad, length is 1-
2m。
4. the single-photon source based on all-fiber femto-second laser according to claim 1, it is characterised in that：Described light
The power amplification multiple of fiber amplifier (2) is 50 times.
5. the single-photon source based on all-fiber femto-second laser according to claim 1, it is characterised in that：Described
One optical circulator (7) and the first narrow band fiber bragg grating (8) composition all-fiber filter, the second optical circulator (9) and second
Narrow band fiber bragg grating (10) constitutes all-fiber filter, the first narrow band fiber bragg grating (8) and the second narrow band fiber bragg grating
(10) a width of 0.5-1nm of band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710159271.5A CN106654834A (en) | 2017-03-17 | 2017-03-17 | Single photon source based on total optical fiber femtosecond laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710159271.5A CN106654834A (en) | 2017-03-17 | 2017-03-17 | Single photon source based on total optical fiber femtosecond laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106654834A true CN106654834A (en) | 2017-05-10 |
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ID=58848385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710159271.5A Pending CN106654834A (en) | 2017-03-17 | 2017-03-17 | Single photon source based on total optical fiber femtosecond laser |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070223553A1 (en) * | 2006-03-23 | 2007-09-27 | Matsushita Electric Industrial Co., Ltd. | Laser system with the laser oscillator and the laser amplifier pumped by a single source |
| CN101382624A (en) * | 2008-10-31 | 2009-03-11 | 北京交通大学 | Microwave and millimeter-wave generating device based on double optical fiber grating structure |
| CN206542061U (en) * | 2017-03-17 | 2017-10-03 | 天津欧泰激光科技有限公司 | A kind of single-photon source based on all-fiber femto-second laser |
-
2017
- 2017-03-17 CN CN201710159271.5A patent/CN106654834A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070223553A1 (en) * | 2006-03-23 | 2007-09-27 | Matsushita Electric Industrial Co., Ltd. | Laser system with the laser oscillator and the laser amplifier pumped by a single source |
| CN101382624A (en) * | 2008-10-31 | 2009-03-11 | 北京交通大学 | Microwave and millimeter-wave generating device based on double optical fiber grating structure |
| CN206542061U (en) * | 2017-03-17 | 2017-10-03 | 天津欧泰激光科技有限公司 | A kind of single-photon source based on all-fiber femto-second laser |
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