CN213960070U - Half-wave voltage calibration equipment of optical fiber phase shifter - Google Patents
Half-wave voltage calibration equipment of optical fiber phase shifter Download PDFInfo
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- CN213960070U CN213960070U CN202121577946.6U CN202121577946U CN213960070U CN 213960070 U CN213960070 U CN 213960070U CN 202121577946 U CN202121577946 U CN 202121577946U CN 213960070 U CN213960070 U CN 213960070U
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Abstract
The utility model discloses an optical fiber phase shifter half-wave voltage calibration equipment relates to quantum communication equipment test field, including signal generator, pulsed light source, beam splitter, optic fibre extension line, optic fibre phase shifter and collector, wherein, signal generator is used for providing the driving voltage of settlement within range for optic fibre phase shifter, pulsed light source is used for preparing pulsed light, the beam splitter is used for splitting the pulsed light and inputs the optic fibre phase shifter with the light signal of the same kind in the pulsed light after the beam splitting, another light signal passes through the optic fibre extension line and inputs the optic fibre phase shifter, make two bundles of light signals after the beam splitting produce the interference, obtain the light signal after the interference; the optical fiber extension line is used for controlling the time of one path of optical signal in the split pulse light reaching the optical fiber phase shifter; the optical fiber phase shifter is used for adjusting the phase of one path of optical signal in the split pulse light, so that the contrast of the interfered optical signal reaches the maximum value, and the precise calibration of the half-wave voltage of the optical fiber phase shifter is realized.
Description
Technical Field
The utility model relates to a quantum communication equipment test field, concretely relates to optical fiber phase shifter half-wave voltage calibration equipment.
Background
Fiber phase shifters are an important component of many optical measurement systems and are commonly used to adjust the phase of an optical signal to compensate for phase drift of the optical measurement system due to environmental changes. In a quantum communication system, the optical fiber interferometer has small insertion loss and high phase adjustment speed, and is suitable for serving as a phase compensation device in the quantum communication system. The half-wave voltage is an important parameter index of the optical fiber phase shifter, and refers to a voltage value corresponding to the optical signal after interference when the phase of the optical signal is adjusted from zero to pi, the half-wave voltages corresponding to the optical fiber phase shifters with different frequencies are slightly different, and most application occasions do not need too accurate half-wave voltage values, but the optical signal after interference needs to be accurately subjected to phase compensation in quantum communication, so that the accurate half-wave voltage of the optical fiber phase shifter is obtained. At present, a scheme for accurately calibrating the half-wave voltage of the optical fiber phase shifter is not available.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an optical fiber phase shifter half-wave voltage calibration equipment for solve the unable defect that obtains optical fiber phase shifter accurate half-wave voltage that prior art exists.
In order to achieve the above object, an embodiment of the present invention provides an optical fiber phase shifter half-wave voltage calibration apparatus, which adopts the following scheme:
the embodiment of the utility model provides an optical phase shifter half-wave voltage calibration equipment includes:
and the signal generator is used for providing a driving voltage within a set range for the optical fiber phase shifter.
The pulse light source is used for preparing pulse light.
And the beam splitter is used for splitting the pulse light and inputting one path of optical signal in the split pulse light into the optical fiber phase shifter, and the other path of optical signal is input into the optical fiber phase shifter through an optical fiber extension line, so that two split optical signals generate interference to obtain an interfered optical signal.
The optical fiber extension line is used for controlling the time of one path of optical signal in the split pulse light reaching the optical fiber phase shifter, so that the two paths of split optical signals do not reach the optical fiber phase shifter at the same time.
The optical fiber phase shifter is used for adjusting the phase of one path of optical signal in the split pulse light, so that the contrast of the interfered optical signal reaches the maximum value.
And the collector is used for acquiring and displaying the amplitude of the interfered optical signal corresponding to each time point in real time.
As a preferred embodiment of the present invention, the collector is an oscilloscope.
As a preferred embodiment of the present invention, the collector is an acquisition card.
As a preferred embodiment of the present invention, the pulsed light source is a pulsed laser.
As a preferred embodiment of the present invention, the signal generator is a square wave signal generator.
As a preferred embodiment of the present invention, the half-wave voltage calibration apparatus for an optical fiber phase shifter further comprises:
the output end of the polarization controller is optically connected to the input end of the optical fiber extension line and is used for adjusting the polarization state of the optical signal input into the optical fiber extension line, so that the polarization state is kept unchanged.
As a preferred embodiment of the present invention, the half-wave voltage calibration apparatus for an optical fiber phase shifter further comprises:
and the input end of the photoelectric detector is optically connected to the output end of the beam splitter and is used for converting the interfered optical signal into an electric signal.
The embodiment of the utility model provides an optical phase shifter half-wave voltage calibration equipment has following beneficial effect:
the optical fiber phase shifter is matched with the signal generator, the pulse light source, the beam splitter, the optical fiber extension line and the collector for use, so that the precise calibration of the half-wave voltage of the optical fiber phase shifter is realized.
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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the embodiment of the utility model provides an optical phase shifter half-wave voltage calibration equipment structure sketch map.
Fig. 2 is a schematic diagram showing a relationship between time and amplitude of pulsed light after interference by using the half-wave voltage calibration device of the optical fiber phase shifter shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment of the utility model provides an optical fiber phase shifter half-wave voltage calibration equipment includes that pulsed light source, beam splitter, optic fibre move looks ware, optic fibre extension line, polarization controller, photoelectric detector, collector, signal generator, wherein:
the signal generator is used for providing a driving voltage within a set range for a fiber phase shifter in the fiber interferometer.
As an alternative embodiment of the present invention, the signal generator is a square wave signal generator.
The pulse light source is used for preparing pulse light.
In particular, instead of a pulsed light source, a continuous light source may also be used.
As an optional embodiment of the present invention, the pulse light source is a pulse laser, and can produce and emit pulse light.
The beam splitter is used for splitting the pulse light and inputting one path of optical signal in the split pulse light into the optical fiber phase shifter, and the other path of optical signal is input into the optical fiber phase shifter through the optical fiber extension line, so that two beams of optical signals after being split generate interference, and the interfered optical signal is obtained.
The optical fiber extension line is used for controlling the time of one path of optical signal in the split pulse light reaching the optical fiber phase shifter, so that the two paths of split optical signals cannot reach the optical fiber phase shifter at the same time.
And the combination of the beam splitter, the optical fiber phase shifter, the optical fiber extension line and the polarization controller forms the sagnac interferometer.
The optical fiber phase shifter is used for adjusting the phase of one path of optical signal in the split pulse light, so that the contrast of the interfered optical signal reaches the maximum value.
The collector is used for acquiring and displaying the amplitude of the interfered optical signal corresponding to each time point in real time.
The output end of the polarization controller is optically connected to the input end of the optical fiber extension line and is used for adjusting the polarization state of the optical signal input into the optical fiber extension line, so that the polarization state is kept unchanged.
The input end of the photoelectric detector is optically connected to the output end of the beam splitter and used for converting the interfered optical signal into an electric signal.
As an optional embodiment of the present invention, the collector may be an oscilloscope, an acquisition card, or other collectors with the same function.
Particularly, if the response frequency of the optical fiber phase shifter is not high, a wider pulse modulation signal is needed, that is, an optical fiber with a length greater than a set value (for example, 200 km) is needed, so that attenuation reaches 40dB, the energy of common pulse light may not be reached, and at this time, a single photon detector is needed to be used as a collector, so that an oscilloscope is not needed, and the test result is more objective and accurate.
Specifically, adopt the embodiment of the utility model provides a method that optical fiber phase shifter half-wave voltage calibration equipment markd optical fiber phase shifter is as follows:
as shown in fig. 2, the positive-amplitude pulse light and the negative-amplitude pulse light are respectively interfered pulse lights, and the sum of the amplitudes of the positive-amplitude pulse light and the negative-amplitude pulse light is a fixed value, so that the amplitude of the positive-amplitude pulse light can be maximized only according to the amplitude change of one pulse light of the positive-amplitude pulse light and the negative-amplitude pulse light, namely, the amplitude of the positive-amplitude pulse light is regulated by regulating the driving voltage, and when the amplitude of the negative-amplitude pulse light is minimized, the voltage value corresponding to the driving voltage is the half-wave voltage of the optical fiber phase shifter. The sagnac interferometer is stable, the waveform displayed on the oscilloscope is very stable, and the sagnac interferometer is suitable for being used in a direct current environment, so that the obtained half-wave voltage is relatively accurate.
The embodiment of the utility model provides an optical fiber phase shifter half-wave voltage calibration equipment includes signal generator, pulsed light source, beam splitter, the optic fibre extension line, optic fibre moves looks ware and collector, wherein, signal generator is used for moving the ware for optic fibre and provides the driving voltage who sets for the within range, pulsed light source is used for preparing the pulsed light, beam splitter is used for with the pulsed light beam splitting and with the optic fibre phase shifter of all the way light signal input in the pulse light after the beam splitting, another way light signal passes through the optic fibre extension line and inputs the optic fibre and moves the ware, make two bundles of light signal after the beam splitting produce the interference, obtain the light signal after the interference; the optical fiber extension line is used for controlling the time of one path of optical signal in the split pulse light reaching the optical fiber phase shifter, so that the two paths of split optical signals do not reach the optical fiber phase shifter at the same time; the optical fiber phase shifter is used for adjusting the phase of one path of optical signal in the split pulse light, so that the contrast of the interfered optical signal reaches the maximum value; the collector is used for acquiring and displaying the amplitude of the interfered optical signal corresponding to each time point in real time, and the precise calibration of the half-wave voltage of the optical fiber phase shifter is realized.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides an optical fiber phase shifter half-wave voltage calibration equipment which characterized in that includes:
the signal generator is used for providing a driving voltage within a set range for the optical fiber phase shifter;
the pulse light source is used for preparing pulse light;
the beam splitter is used for splitting the pulse light and inputting one path of optical signal in the split pulse light into the optical fiber phase shifter, and the other path of optical signal is input into the optical fiber phase shifter through an optical fiber extension line, so that two split optical signals generate interference to obtain an interfered optical signal;
the optical fiber extension line is used for controlling the time of one path of optical signal in the split pulse light reaching the optical fiber phase shifter, so that the two paths of split optical signals do not reach the optical fiber phase shifter at the same time;
the optical fiber phase shifter is used for adjusting the phase of one path of optical signal in the split pulse light, so that the contrast of the interfered optical signal reaches the maximum value;
and the collector is used for acquiring and displaying the amplitude of the interfered optical signal corresponding to each time point in real time.
2. The apparatus for calibrating a half-wave voltage of an optical fiber phase shifter according to claim 1, wherein the collector is an oscilloscope.
3. The apparatus for calibrating a half-wave voltage of an optical fiber phase shifter according to claim 1, wherein the collector is an acquisition card.
4. The fiber phase shifter half-wave voltage calibration device according to claim 1, wherein the pulsed light source is a pulsed laser.
5. The fiber phase shifter half-wave voltage calibration device according to claim 1, wherein the signal generator is a square wave signal generator.
6. The apparatus for half-wave voltage calibration in an optical fiber phase shifter according to any one of claims 1 to 5, further comprising:
the output end of the polarization controller is optically connected to the input end of the optical fiber extension line and is used for adjusting the polarization state of the optical signal input into the optical fiber extension line, so that the polarization state is kept unchanged.
7. The apparatus for calibrating a half-wave voltage of an optical fiber phase shifter according to claim 6, further comprising:
and the input end of the photoelectric detector is optically connected to the output end of the beam splitter and is used for converting the interfered optical signal into an electric signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121577946.6U CN213960070U (en) | 2021-07-13 | 2021-07-13 | Half-wave voltage calibration equipment of optical fiber phase shifter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121577946.6U CN213960070U (en) | 2021-07-13 | 2021-07-13 | Half-wave voltage calibration equipment of optical fiber phase shifter |
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| CN213960070U true CN213960070U (en) | 2021-08-13 |
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| CN202121577946.6U Active CN213960070U (en) | 2021-07-13 | 2021-07-13 | Half-wave voltage calibration equipment of optical fiber phase shifter |
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- 2021-07-13 CN CN202121577946.6U patent/CN213960070U/en active Active
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