CN116299869B - Optical fiber interference device and quantum communication equipment - Google Patents
Optical fiber interference device and quantum communication equipment Download PDFInfo
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- CN116299869B CN116299869B CN202310557085.2A CN202310557085A CN116299869B CN 116299869 B CN116299869 B CN 116299869B CN 202310557085 A CN202310557085 A CN 202310557085A CN 116299869 B CN116299869 B CN 116299869B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/2935—Mach-Zehnder configuration, i.e. comprising separate splitting and combining means
- G02B6/29352—Mach-Zehnder configuration, i.e. comprising separate splitting and combining means in a light guide
- G02B6/29353—Mach-Zehnder configuration, i.e. comprising separate splitting and combining means in a light guide with a wavelength selective element in at least one light guide interferometer arm, e.g. grating, interference filter, resonator
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29398—Temperature insensitivity
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4266—Thermal aspects, temperature control or temperature monitoring
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
The application provides an optical fiber interference device and a quantum communication device, wherein the optical fiber interference device comprises: long and short arms; a beam splitter disposed at the input ends of the long arm and the short arm; the beam combiner is arranged at the output ends of the long arm and the short arm; and a tubular member having a gas and a liquid metal sealed therein and sleeved outside the optical fiber of the short arm, wherein the liquid metal surrounds a part or all of the optical fiber of the short arm at a predetermined pressure at a first temperature, and when an ambient temperature of the optical fiber interference device changes from the first temperature to a second temperature, the liquid metal changes from the first volume to the second volume within the tubular member to compensate for an excess amount of an optical path change in the long arm relative to an optical path change in the short arm under the influence of the ambient temperature change. The application can promote the adaptability of the optical fiber interferometer to the surrounding environment so as to ensure the stability of the interference effect.
Description
Technical Field
The application relates to the technical field of quantum communication, in particular to an optical fiber interference device and quantum communication equipment.
Background
The optical fiber interferometer is an instrument manufactured based on the interference principle of light, and the accuracy of the difference between the long arm and the short arm determines the measurement sensitivity and the system code rate of the quantum communication system.
However, in actual use, the long and short arms of the fiber optic interferometer are susceptible to environmental factor changes (e.g., temperature heating or cooling), which can result in the long and short arms of the fiber optic interferometer changing. Because the long arm and the short arm of the optical fiber interferometer are often inconsistent in variation, the precision of the difference between the long arm and the short arm of the optical fiber interferometer is difficult to control, which can affect the performance of the optical fiber interferometer, and further reduce the measurement sensitivity and the system code rate of the quantum communication system.
Disclosure of Invention
The application aims to provide an optical fiber interference device and quantum communication equipment.
According to an aspect of the present application, there is provided an optical fiber interference device including: long and short arms; a beam splitter disposed at the input ends of the long arm and the short arm; the beam combiner is arranged at the output ends of the long arm and the short arm; and a tubular member having a gas and a liquid metal sealed therein and being sleeved outside the optical fiber of the short arm, wherein the liquid metal surrounds a part or all of the optical fiber of the short arm at a predetermined pressure by the gas at a first temperature, and when an ambient temperature of the optical fiber interference device changes from the first temperature to a second temperature, the liquid metal changes from a first volume to a second volume within the tubular member to compensate for an excess amount of an optical path change in the long arm relative to an optical path change in the short arm under the influence of the ambient temperature change.
According to one embodiment of the application, when the ambient temperature of the optical fiber interference device increases from a first temperature to a second temperature, the liquid metal expands from a first volume to a second volume within the tubular member to compensate for an excess of optical path change in the long arm relative to optical path change in the short arm under the influence of the ambient temperature increase by the optical path change generated in the short arm by the expansion.
According to one embodiment of the application, when the ambient temperature of the optical fiber interference device drops from a first temperature to a second temperature, the liquid metal is contracted from a first volume to a second volume within the tubular member to compensate for an excess of optical path change in the long arm relative to optical path change in the short arm under the influence of the ambient temperature drop by the optical path change generated in the short arm by the contraction.
According to one embodiment of the application, the liquid metal is reduced from the second volume back to the first volume within the tubular member when the ambient temperature of the optical fiber interference device changes from the second temperature to the first temperature.
According to one embodiment of the application, the liquid metal is any one of mercury, cesium, gallium, rubidium, potassium, sodium, indium, lithium, tin, bismuth, thallium, cadmium, lead, zinc, antimony, magnesium, aluminum or an alloy of at least two of mercury, cesium, gallium, rubidium, potassium, sodium, indium, lithium, tin, bismuth, thallium, cadmium, lead, zinc, antimony, magnesium, aluminum.
According to one embodiment of the application, the tubular member is made of one of glass, metal and plastic.
According to one embodiment of the application, the gas is an inert gas.
According to one embodiment of the present application, the first temperature is a normal temperature.
According to one embodiment of the application, the optical fiber interference device is comprised in a transmitting and/or receiving end of a quantum communication system.
According to one embodiment of the application, the coding mode of the quantum communication system is based on one of phase coding and time phase coding.
According to one embodiment of the application, the optical fiber interference device is in an optimal interference state in a quantum communication system when the liquid metal surrounds part or all of the short-arm optical fiber with a predetermined pressure by the gas at a first temperature.
According to another aspect of the application there is also provided a quantum communication device comprising an optical fibre interference device as described above.
The optical fiber interference device provided by the application can improve the adaptability of the optical fiber interferometer to the surrounding environment so as to ensure the stability of the interference effect. On the basis, the quantum communication equipment provided by the application can further improve the measurement sensitivity and the system code rate of a quantum communication system.
Drawings
The above objects and features of the present application will become more apparent from the following description taken in conjunction with the accompanying drawings.
Fig. 1 shows a schematic structure of an optical fiber interference device according to an exemplary embodiment of the present application.
Fig. 2 shows an enlarged schematic view of a cross section of a tubular member having gas and liquid metal sealed therein and sleeved outside an optical fiber of a short arm according to an exemplary embodiment of the present application.
Fig. 3 shows a schematic diagram of a michelson interferometer using the optical fiber interferometer apparatus of fig. 1 according to an exemplary embodiment of the present application.
Fig. 4 shows a schematic optical path diagram of a michelson interferometer to which the optical fiber interferometer apparatus of fig. 1 is applied, according to an exemplary embodiment of the present application.
Detailed Description
In the optical fiber interferometer, when the ambient temperature changes (for example, the temperature becomes hot or cold), the optical path change in the long arm is always larger than that in the short arm, which causes the optical path difference between the long arm and the short arm of the optical fiber interferometer to change, resulting in unstable interference effect of the optical fiber interferometer. For example, when the ambient temperature increases, the optical path length in the long arm and the optical path length in the short arm increase, and since the optical fiber of the long arm is longer than the optical fiber of the short arm, the optical path length in the long arm increases more than the optical path length in the short arm, and therefore when the ambient temperature increases, the optical path difference between the long arm and the short arm of the optical fiber interferometer increases, and the optical path difference increases, which results in deterioration of the interference effect of the optical fiber interferometer. When the ambient temperature decreases, the optical path length in the long arm and the optical path length in the short arm decrease, and the optical fiber in the long arm is longer than the optical fiber in the short arm, so that the decrease in the optical path length in the long arm is larger than the decrease in the optical path length in the short arm, and therefore, when the ambient temperature decreases, the optical path length difference between the long arm and the short arm of the optical fiber interferometer decreases, and the interference effect of the optical fiber interferometer also decreases due to the decrease in the optical path length difference. Therefore, when the ambient temperature changes, the accuracy of the optical path difference between the long arm and the short arm of the optical fiber interferometer will be difficult to control, which will affect the stability of the interference effect of the optical fiber interferometer, and for the quantum communication system using the optical fiber interferometer for encoding and decoding, the measurement sensitivity and the system code rate of the quantum communication system will be reduced. For example, in a quantum communication system based on phase encoding and time phase encoding, an optical encoding module of a transmitting end and an optical decoding module of a receiving end each include an optical fiber interferometer, in order to ensure that the above-described quantum communication system obtains a continuous and stable optimal interference effect to ensure stability of a system code rate, it is necessary to make an optical path difference between long and short arms of the optical fiber interferometer included in the optical encoding module of the transmitting end and an optical path difference between long and short arms of the optical fiber interferometer included in the optical decoding module of the receiving end constant during operation of the system, so that the above-described quantum communication system can be prevented from causing an increase in a system error rate due to a deterioration in interference effect of the optical fiber interferometer.
The application is based on the idea that a tubular member, in which a gas and a liquid metal are enclosed, is sleeved outside the optical fiber of the short arm of the optical fiber interferometer and the liquid metal in the tubular member surrounds the optical fiber of the short arm with a predetermined pressure by the gas at normal temperature, so as to change the pressure applied to the optical fiber of the short arm of the optical fiber interferometer by utilizing the characteristic that the volume of the liquid metal can change with the change of the temperature, the optical path change trend of the pressure generated in the short arm of the optical fiber interferometer is consistent with the optical path change trend generated in the short arm of the optical fiber interferometer by the change of the ambient temperature, for example, when the ambient temperature rises, the volume of the liquid metal in the tubular member is increased, accordingly, the extrusion between the liquid metal and the optical fiber of the short arm of the optical fiber interferometer and the gas is increased, and the increase of the pressure of the liquid metal can further increase the optical path in the short arm of the optical fiber interferometer under the influence of the ambient temperature, and the further increase of the optical path in the short arm can effectively compensate or offset the super-optical path change of the change in the short arm under the influence of the ambient temperature. As the ambient temperature decreases, the volume of liquid metal in the tubular member and, correspondingly, the squeeze between the liquid metal and the gas and the optical fibers of the short arm of the optical fiber interferometer decreases, and for the short arm of the optical fiber interferometer, the pressure decrease of the liquid metal causes the optical path length in the short arm of the optical fiber interferometer to be further reduced under the influence of the ambient temperature decrease, which further reduction of the optical path length in the short arm effectively compensates or counteracts the overshoot of the optical path length variation in the long arm under the influence of the ambient temperature decrease with respect to the optical path length variation in the short arm. It can be seen that the tubular member having the gas and the liquid metal sealed therein is sleeved outside the optical fiber of the short arm of the optical fiber interferometer and the liquid metal in the tubular member surrounds the optical fiber of the short arm at normal temperature by the gas at a predetermined pressure to help keep the optical path change in the long arm of the optical fiber interferometer and the optical path change in the short arm of the optical fiber interferometer consistent with the ambient temperature change, so that the optical path difference between the long arm and the short arm of the optical fiber interferometer can be ensured to be kept constant with the ambient temperature change, and the stability of the interference effect of the optical fiber interferometer can be ensured.
Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structure of an optical fiber interference device according to an exemplary embodiment of the present application. Fig. 2 shows an enlarged schematic view of a cross section of a tubular member having gas and liquid metal sealed therein and sleeved outside an optical fiber of a short arm according to an exemplary embodiment of the present application.
Referring to fig. 1, an optical fiber interference device according to an exemplary embodiment of the present application may include at least a long arm L 1 And a short arm L 2 A beam splitter BS, a beam combiner BC and a tubular member Tube, wherein the beam splitter BS can be arranged on a long arm L 1 And a short arm L 2 The beam combiner BC may be arranged at the long arm L 1 And a short arm L 2 A tubular member Tube having a gas NG and a liquid metal LM sealed therein is sleeved on the short arm L 2 Is arranged outside the optical fiber. In addition, in the optical fiber interference device shown in fig. 1, the liquid metal LM surrounds the short arm L at a predetermined pressure by the gas NG at the first temperature 2 When the ambient temperature of the optical fiber interference device changes from a first temperature to a second temperature, the liquid metal LM is transformed from a first volume to a second volume within the tubular member Tube to compensate for the long arm L under the influence of the ambient temperature change 1 Optical path change in (a) relative to the short arm L 2 An overrun of the optical path change in (a).
In one example, when the ambient temperature of the fiber optic interference device is from a first temperatureUpon rising to the second temperature, the liquid metal LM is expandable from the first volume to the second volume within the tubular member Tube to pass through said expansion at the short arm L 2 The resulting optical path change compensates for the long arm L under the influence of ambient temperature rise 1 Optical path change in (a) relative to the short arm L 2 To ensure that the optical path change in the long arm of the optical fiber interferometer and the optical path change in the short arm of the optical fiber interferometer remain consistent as the ambient temperature increases.
In another example, when the ambient temperature of the optical fiber interference device drops from the first temperature to the second temperature, the liquid metal LM may shrink from the first volume to the second volume within the tubular member Tube to be at the short arm L by the shrinkage 2 The resulting optical path change in compensates for the long arm L under the influence of ambient temperature drop 1 Optical path change in (a) relative to the short arm L 2 To ensure that the optical path change in the long arm of the optical fiber interferometer and the optical path change in the short arm of the optical fiber interferometer remain consistent as the ambient temperature decreases.
In the optical fiber interference device shown in fig. 1, when the ambient temperature of the optical fiber interference device changes from the second temperature to the first temperature, the liquid metal LM changes from the second volume back to the first volume within the tubular member Tube.
In the optical fiber interference device shown in fig. 1, the tubular member may be made of one of materials such as, but not limited to, glass, metal, and plastic.
In the optical fiber interference device shown in fig. 1, the liquid metal sealed in the tubular member may be, for example, but not limited to, one of mercury, cesium, gallium, rubidium, potassium, sodium, indium, lithium, tin, bismuth, thallium, cadmium, lead, zinc, antimony, magnesium, aluminum, or an alloy of these liquid metals, for example, gallium indium alloy, gallium indium tin alloy, or the like. These liquid metals are each capable of producing sufficient change in volume with temperature to produce a suitable pressure on the optical fiber enclosed therein.
In the optical fiber interference device shown in fig. 1, the gas sealed in the tubular member may use an inert gas to prevent oxidation inside the tube.
It can be seen that the optical fiber interference device according to the exemplary embodiment of the present application can ensure that the optical path difference between the long arm and the short arm thereof is kept constant with the change of the ambient temperature to ensure the stability of the interference effect thereof.
Fig. 3 shows a schematic diagram of a michelson interferometer using the optical fiber interferometer apparatus of fig. 1 according to an exemplary embodiment of the present application. Fig. 4 shows a schematic optical path diagram of a michelson interferometer to which the optical fiber interferometer apparatus of fig. 1 is applied, according to an exemplary embodiment of the present application. Referring to fig. 3 and 4, a michelson interferometer employing the optical fiber interference device of fig. 1 according to an exemplary embodiment of the present application may include a long arm L 1 And a short arm L 2 A tubular member Tube having a gas NG and a liquid metal LM sealed therein, faraday mirrors 101 and 102, and a dual-input dual-output fiber coupler 103 serving as a beam splitter BS and a beam combiner BC, wherein the dual-input dual-output fiber coupler 103 is disposed at one side in a housing of a Michelson interferometer, the Faraday mirrors 101 and 102 are respectively mounted in U-shaped cards disposed in the housing of the Michelson interferometer, and the tubular member Tube is sleeved on a short arm L 2 And the liquid metal LM surrounds the short arm L at a predetermined pressure by the gas NG at normal temperature (such as 25 ℃) 2 Is a part of the optical fiber.
When the ambient temperature rises from 25 ℃ to 30 ℃, the volume of the liquid metal LM expands in the tubular member Tube, the pressure to which the optical fiber surrounded by the liquid metal LM is subjected increases, and the short arm L is subjected to the dual effects of the pressure increase and the ambient temperature rise 2 The increment of the optical path in (a) and the long arm L 1 The increase in optical path length in (c) is kept uniform, which enables the optical path length difference between the long and short arms of the michelson interferometer to be kept constant with an increase in ambient temperature to ensure stability of the interference effect thereof.
When the ambient temperature decreases from 25 ℃ to 20 ℃, the volume of the liquid metal LM contracts in the tubular member Tube, the pressure to which the optical fiber surrounded by the liquid metal LM is subjected becomes small, and the dual effects of the pressure decrease and the ambient temperature decrease are exertedShort arm L 2 Reduction in optical path length and long arm L 1 The decrease in optical path length in (c) is kept uniform, which enables the optical path length difference between the long and short arms of the michelson interferometer to be kept constant with a decrease in ambient temperature to ensure stability of the interference effect thereof.
It can be seen that the optical fiber interference device according to the exemplary embodiment of the present application can provide stable and reliable operation performance for a quantum communication system (such as a quantum key distribution system based on phase encoding or time phase encoding) using an optical fiber interferometer for encoding and decoding, and thus, the optical fiber interference device according to the exemplary embodiment of the present application can be applied to optical fiber interferometers of a transmitting end and a receiving end of a quantum communication system to further improve measurement sensitivity and a system bitrate of the quantum communication system.
While the application has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the spirit and scope of the application as defined by the following claims.
Claims (11)
1. An optical fiber interference device, comprising:
long and short arms;
a beam splitter disposed at the input ends of the long arm and the short arm;
the beam combiner is arranged at the output ends of the long arm and the short arm; and
a tubular member in which gas and liquid metal are sealed and which is sleeved outside the optical fiber of the short arm,
wherein the liquid metal passes through the gas at a first temperature to surround part or all of the optical fiber of the short arm at a predetermined pressure at which the optical fiber interference device is in an optimal interference state, the liquid metal being transformed from a first volume to a second volume within the tubular member when an ambient temperature of the optical fiber interference device changes from the first temperature to the second temperature to compensate for an excess of an optical path change in the long arm relative to an optical path change in the short arm under the influence of the ambient temperature change.
2. The optical fiber interference device according to claim 1, wherein when an ambient temperature of the optical fiber interference device increases from a first temperature to a second temperature, the liquid metal expands from a first volume to a second volume within the tubular member to compensate for an excess of an optical path change in the long arm relative to an optical path change in the short arm under the influence of the ambient temperature increase by an optical path change generated in the short arm by the expansion.
3. The fiber optic interference device according to claim 1, wherein when an ambient temperature of the fiber optic interference device decreases from a first temperature to a second temperature, the liquid metal contracts from a first volume to a second volume within the tubular member to compensate for an excess of an optical path change in the long arm relative to an optical path change in the short arm under the influence of the ambient temperature decrease by an optical path change generated in the short arm by the contraction.
4. The fiber optic interference device according to claim 1 wherein the liquid metal is reduced from the second volume back to the first volume within the tubular member when the ambient temperature of the fiber optic interference device changes from the second temperature to the first temperature.
5. The optical fiber interference device of claim 1 wherein the liquid metal is any one of mercury, cesium, gallium, rubidium, potassium, sodium, indium, lithium, tin, bismuth, thallium, cadmium, lead, zinc, antimony, magnesium, aluminum or an alloy of at least two of mercury, cesium, gallium, rubidium, potassium, sodium, indium, lithium, tin, bismuth, thallium, cadmium, lead, zinc, antimony, magnesium, aluminum.
6. The fiber optic interference device according to claim 1 wherein the tubular member is made of one of glass, metal and plastic.
7. The fiber optic interference device according to claim 1 wherein the gas is an inert gas.
8. The optical fiber interference device according to claim 1, wherein the first temperature is an ordinary temperature.
9. The optical fiber interference device of claim 1, wherein the optical fiber interference device is included in a transmitting end and/or a receiving end of a quantum communication system.
10. The optical fiber interference device according to claim 9, wherein the quantum communication system is encoded based on one of phase encoding and time phase encoding.
11. A quantum communication device, comprising:
the optical fiber interference device of any one of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310557085.2A CN116299869B (en) | 2023-05-17 | 2023-05-17 | Optical fiber interference device and quantum communication equipment |
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| CN202310557085.2A CN116299869B (en) | 2023-05-17 | 2023-05-17 | Optical fiber interference device and quantum communication equipment |
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| CN116299869A CN116299869A (en) | 2023-06-23 |
| CN116299869B true CN116299869B (en) | 2023-10-03 |
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Citations (5)
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|---|---|---|---|---|
| CA2315006A1 (en) * | 2000-08-03 | 2002-02-03 | Tellamon Photonic Networks Inc. | Temperature insensitive mach-zehnder interferometer |
| JP2005241298A (en) * | 2004-02-24 | 2005-09-08 | Oki Electric Ind Co Ltd | Interference type optical fiber sensor |
| CN101046451A (en) * | 2007-04-19 | 2007-10-03 | 山东科技大学 | Methane detecting fiber interference process and equipment |
| CN108132067A (en) * | 2017-12-11 | 2018-06-08 | 哈尔滨工程大学 | A kind of polarization maintaining optical fibre interferometer of passive temperature compensation and its compensation method |
| CN219018824U (en) * | 2023-03-24 | 2023-05-12 | 国开启科量子技术(北京)有限公司 | Integrated inequality arm interferometer with self-calibration function and quantum communication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6778278B2 (en) * | 2000-08-03 | 2004-08-17 | Peleton Photonic Systems Inc. | Temperature insensitive Mach-Zehnder interferometers and devices |
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2023
- 2023-05-17 CN CN202310557085.2A patent/CN116299869B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2315006A1 (en) * | 2000-08-03 | 2002-02-03 | Tellamon Photonic Networks Inc. | Temperature insensitive mach-zehnder interferometer |
| JP2005241298A (en) * | 2004-02-24 | 2005-09-08 | Oki Electric Ind Co Ltd | Interference type optical fiber sensor |
| CN101046451A (en) * | 2007-04-19 | 2007-10-03 | 山东科技大学 | Methane detecting fiber interference process and equipment |
| CN108132067A (en) * | 2017-12-11 | 2018-06-08 | 哈尔滨工程大学 | A kind of polarization maintaining optical fibre interferometer of passive temperature compensation and its compensation method |
| CN219018824U (en) * | 2023-03-24 | 2023-05-12 | 国开启科量子技术(北京)有限公司 | Integrated inequality arm interferometer with self-calibration function and quantum communication device |
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| CN116299869A (en) | 2023-06-23 |
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