CN1377147A - Single-photon router - Google Patents
Single-photon router Download PDFInfo
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- CN1377147A CN1377147A CN02111395A CN02111395A CN1377147A CN 1377147 A CN1377147 A CN 1377147A CN 02111395 A CN02111395 A CN 02111395A CN 02111395 A CN02111395 A CN 02111395A CN 1377147 A CN1377147 A CN 1377147A
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- phase modulator
- reflective mirror
- photon
- single photon
- total reflective
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention relates to a device for controlling route of a single photon belonging to the area of aquanta security communication technique. The device consists of a M-Z (Mach-Zehnder) interferometer and a optical phase modulator. The M-Z interferometer is composed of the spectroscope 1,3 and the holophote 2,4. The splitting ratio of the spectroscope 1,3 is 50%. The holophote 2,4 is of total reflection on a single photon wavelength. The optical phase modulator includes the holophote 2 and the piezo-electric micro displacement meter, i.e. the micro displacement of the PZT controls the phase modulation. The input end 6 is the input end of the control voltage of the displacement meter 5. The optical phase modulator can be an Electro-Optical phase modulator i.e. EOM positioned between the spectroscope 1 and the holophote 2.
Description
Technical field
The present invention relates to a kind of single-photon router device, realize single photon route control is belonged to the quantum secure communication technique field.
Background technology
The quantum secure communication is based on the communication of light quantum, guarantees communication security by quantum theory.Information is carried on the single photon in the quantum secure communication, and transmit by single photon, the listener-in just can not obtain communication information and don't be found like this, therefore the quantum secure communication can realize the communication that maintains complete secrecy, and this transmits and aspect such as business information authentication all will be widely used in military secrecy.The quantum secure communication is similar to existing optical communication, also has the selection to information path, the technical problem of route.The route technology development is comparatively comprehensive in the existing optical communication technology, and various method for routing and technology are arranged, but owing to be that single photon is carried out route control in the quantum secure communication, which kind of method is applicable to single-photon router, so far also lack research, and be worth inquiring at the deeper physical problem that also has in theory that single photon is controlled.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of single-photon router device, has simple in structurely, and control is convenient, is expected to realize the modular advantage of single-photon router device.The present invention adopts following structure that above-mentioned technical problem is resolved: a kind of single-photon router device, it is characterized in that, by Mach-Zehnder, be that M-Z interferometer and optical phase modulator are formed, the M-Z interferometer is by beam splitter 1,3 and total reflective mirror 2,4 constitute, beam splitter 1,3 splitting ratio is 50%, total reflective mirror 2, the 4th, the total reflective mirror that the single photon wavelength is all-trans, optical phase modulator is by piezoelectric actuator 5 by total reflective mirror 2, be that the micrometric displacement of PZT is controlled and implemented, total reflective mirror 2 is fixed on the PZT, and input 6 is control voltage input terminal of piezoelectric actuator 5; Optical phase modulator also can be an electro-optic phase modulator 9, i.e. EOM, and electro-optic phase modulator 9 is placed between beam splitter 1 and the total reflective mirror 2, and input 10 is the control voltage input terminal of electro-optic phase modulator 9, port the 7, the 8th, single photon exit end.
Existing accompanying drawings operation principle of the present invention.
In Fig. 1, single photon incides beam splitter 1 along direction as shown, and two kinds of paths can be arranged: one is propagated along an interference arm of M-Z interferometer: reflex to beam splitter 3 through total reflective mirror 2, select then from port 8 or 7 outgoing; Another another interference arm along the M-Z interferometer is propagated: reflex to beam splitter 3 through total reflective mirror 4, select then from port 8 or 7 outgoing.The outgoing route of single photon in port 8 or 7 should be adjusted to fully and overlap.Be added in control voltage on the input 6 by adjusting, make piezoelectric actuator 5 produce micrometric displacement with total reflective mirror 2 thereupon, thereby produce phase difference when light is transmitted between M-Z interferometer two arms, single photon is because this phase difference interferes, and the control single photon is from port 8 or 7 outgoing.When control voltage is 0 volt, piezoelectric actuator 5 and total reflective mirror 2 non-displacements, producing phase difference when light transmits between M-Z interferometer two arms is 0, the single photon process interferes the back from port 7 outgoing, port 8 no photon outgoing; When control voltage when being about 75 volts, piezoelectric actuator 5 produces micrometric displacement with total reflective mirror 2, and the generation phase difference was π when light transmitted between M-Z interferometer two arms, single photon after interfering from port 8 outgoing, port 7 no photon outgoing.
In like manner, in Fig. 2, be added in control voltage on the input 10 by adjusting, produce phase difference when light is transmitted between M-Z interferometer two arms, single photon is because phase difference interferes, and the control single photon is from port 8 or 7 outgoing.When control voltage when being 0 volt, electro-optic phase modulator 9 is not regulated the photon phase place, and the generation phase difference was 0 when light transmitted between M-Z interferometer two arms, single photon after interfering from port 7 outgoing, port 8 no single photon outgoing; When control voltage when being about 5 volts, 9 pairs of photon phase places of electro-optic phase modulator are regulated, and the generation phase difference was π when light transmitted between M-Z interferometer two arms, single photon after interfering from port 8 outgoing, port 7 no single photon outgoing.
To sum up, device of the present invention changes the phase difference that produces when light transmits by regulating the control voltage of optical phase modulator between M-Z interferometer two arms, and the interference of process single photon realizes single-photon router.
Advantage of the present invention is:
1. the route actuation means of this single photon is simple in structure, with low cost;
2. route is controlled at control end and is utilized voltage to control, and control is simple;
3. be expected to realize the modularization of single-photon router device.
Description of drawings
Fig. 1 is the structural representation that adopts the single-photon router device of piezoelectric actuator, wherein the 1, the 3rd, and beam splitter, the 2, the 4th, total reflective mirror, the 5th, piezoelectric actuator, the 6th, control input end, the 7, the 8th, single photon output port.
Fig. 2 is the structural representation that adopts the single-photon router device of electro-optic phase modulator, and wherein 9 is electro-optic phase modulators, the 10th, and control voltage input terminal.
Specific embodiments
The present invention is particularly suitable for being used in the quantum secure communication field, and in this field, information is carried on the single photon, utilizes device of the present invention can realize that the route of single photon controls, and makes single photon along the path transmission of selecting.
Claims (1)
1. single-photon router device, it is characterized in that, by Mach-Zehnder, be that M-Z interferometer and optical phase modulator are formed, the M-Z interferometer is by beam splitter 1,3 and total reflective mirror 2,4 constitute, beam splitter 1,3 splitting ratio is 50%, total reflective mirror 2, the 4th, the total reflective mirror that the single photon wavelength is all-trans, optical phase modulator is by piezoelectric actuator 5 by total reflective mirror 2, be that the micrometric displacement of PZT is controlled and implemented, total reflective mirror 2 is fixed on the PZT, and input 6 is control voltage input terminal of piezoelectric actuator 5, and optical phase modulator also can be an electro-optic phase modulator 9, be EOM, electro-optic phase modulator 9 is placed between beam splitter 1 and the total reflective mirror 2, and input 10 is the control voltage input terminal of electro-optic phase modulator 9, port 7, the 8th, the single photon exit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021113955A CN1156101C (en) | 2002-04-17 | 2002-04-17 | Single-photon router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021113955A CN1156101C (en) | 2002-04-17 | 2002-04-17 | Single-photon router |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1377147A true CN1377147A (en) | 2002-10-30 |
| CN1156101C CN1156101C (en) | 2004-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021113955A Expired - Fee Related CN1156101C (en) | 2002-04-17 | 2002-04-17 | Single-photon router |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100483975C (en) * | 2003-07-08 | 2009-04-29 | 中国科学技术大学 | Quantum network addressing method and quantum network router |
| CN101764648A (en) * | 2010-02-10 | 2010-06-30 | 南通墨禾量子科技发展有限公司 | Polarization-preserving plug-and-play quantum secret communication system |
| CN102012561A (en) * | 2010-09-20 | 2011-04-13 | 长春理工大学 | Method and system for realizing phase shift in laser interference lithography |
| CN102539382A (en) * | 2005-03-25 | 2012-07-04 | 麻省理工学院 | System and method for hilbert phase imaging |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6460364B2 (en) | 2011-01-25 | 2019-01-30 | マサチューセッツ インスティテュート オブ テクノロジー | Off-axis reflection phase microscope system and method for off-axis phase microscope |
| WO2013086527A1 (en) | 2011-12-09 | 2013-06-13 | Massachusetts Institute Of Technology | Systems and methods self-referenced quantitative phase microscopy |
-
2002
- 2002-04-17 CN CNB021113955A patent/CN1156101C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100483975C (en) * | 2003-07-08 | 2009-04-29 | 中国科学技术大学 | Quantum network addressing method and quantum network router |
| CN102539382A (en) * | 2005-03-25 | 2012-07-04 | 麻省理工学院 | System and method for hilbert phase imaging |
| CN101764648A (en) * | 2010-02-10 | 2010-06-30 | 南通墨禾量子科技发展有限公司 | Polarization-preserving plug-and-play quantum secret communication system |
| CN101764648B (en) * | 2010-02-10 | 2012-12-26 | 南通墨禾量子科技发展有限公司 | Polarization-preserving plug-and-play quantum secret communication system |
| CN102012561A (en) * | 2010-09-20 | 2011-04-13 | 长春理工大学 | Method and system for realizing phase shift in laser interference lithography |
| CN102012561B (en) * | 2010-09-20 | 2016-03-30 | 长春理工大学 | A kind of method and system realizing phase shift in laser interference lithography |
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| Publication number | Publication date |
|---|---|
| CN1156101C (en) | 2004-06-30 |
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