CN205538163U - Optical fiber dispersion coefficient measuring device - Google Patents
Optical fiber dispersion coefficient measuring device Download PDFInfo
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- CN205538163U CN205538163U CN201620295535.0U CN201620295535U CN205538163U CN 205538163 U CN205538163 U CN 205538163U CN 201620295535 U CN201620295535 U CN 201620295535U CN 205538163 U CN205538163 U CN 205538163U
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- radiofrequency signal
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- dispersion coefficient
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Abstract
The utility model belongs to optic fibre parameter measurement field, concretely relates to optical fiber dispersion coefficient measuring device, including the adjustable DFB narrow linewidth laser instrument of wavelength, electric optic modem, the optic fibre that awaits measuring, high -speed photoelectric detector, vector network analyzer and DC power supply, the DFB narrow linewidth laser instrument that the wavelength is adjustable, electric optic modem, high -speed photoelectric detector constitute a microwave photon link, the wavelength is adjustable, and monochromatic polarized light that DFB narrow linewidth laser instrument sent incides electric optic modem, the radiofrequency signal of vector network analyzer's a first port output frequency sweep gets into electric optic modem, electric optic modem with this radiofrequency signal loading to the light wave and export a light and carry a radiofrequency signal, this light year radiofrequency signal is on inciding high -speed photoelectric detector behind the optic fibre that awaits measuring, high -speed photoelectric detector becomes radiofrequency signal with light signal conversion and inserts that vector network analyzer gathers and the analysis, compare current optical measurements method, it is fast that this method possesses the measuring speed, and measurement accuracy is high to do not receive environmental factor's advantages such as influence.
Description
Technical field
This utility model belongs to Optical fibre parametric measurement field, is specifically related to a kind of fiber dispersion coefficient and measures
Device.
Background technology
The measurement of fiber dispersion coefficient is the important research direction of Optical fibre parametric measurement technology, traditional measurement
Means are all to be realized by methods such as pulse delay method, phase shift method, mode field diameter method and white light interferences,
But the environment resistant jamming performance of these measuring methods is poor, and need complicated time frequency analysis algorithm
Calculate and analyze measurement result.
Utility model content
The purpose of this utility model is to provide the fibre-optical dispersion system that a kind of measuring speed is fast, certainty of measurement is high
Number measurement apparatus.
For achieving the above object, this utility model provides techniques below scheme: a kind of fibre-optical dispersion system
Number measurement apparatus, including Wavelength tunable DFB narrow linewidth laser, electrooptic modulator, testing fiber,
High-speed photodetector, vector network analyzer and DC source；Described Wavelength tunable DFB narrow linewidth
Laser instrument, electrooptic modulator, high-speed photodetector constitute a microwave photon link；Wavelength tunable
The monochromatic polarized light that DFB narrow linewidth laser sends incides electrooptic modulator；Vector network analyzer
The first port export a frequency sweep radiofrequency signal enter electrooptic modulator；Electrooptic modulator is by this radio frequency
Signal loading carries radiofrequency signal to exporting a light on light wave, and this light carries radiofrequency signal through testing fiber
After incide on high-speed photodetector, high-speed photodetector converts optical signals into radiofrequency signal also
It is linked into vector network analyzer be acquired and analyze；
Preferably, the tuning precision of described Wavelength tunable DFB narrow linewidth laser is higher than 0.4nm；
Preferably, described electrooptic modulator modulated signal is provided by vector network analyzer；
Preferably, the DC bias signal of electrooptic modulator is provided by DC source；
Preferably, the input/output terminal of electrooptic modulator is optical fiber；
Preferably, the frequency of described electrooptic modulator, high-speed photodetector and vector network analyzer
Response is more than 30GHz.
Of the present utility model having the technical effect that compares existing measuring method, and the method possesses
Measuring speed is fast, and certainty of measurement is high, and not by advantages such as environmental factors are affected；Use altofrequency
Manipulator, detector and the vector network analyzer of response can improve the accuracy of measurement.
Accompanying drawing explanation
A kind of based on microwave photon technology the fiber dispersion coefficient that Fig. 1 provides for this utility model is measured
Schematic diagram of device；
In figure, 101 is Wavelength tunable DFB narrow linewidth laser, and 102 is electrooptic modulator, and 103 are
Testing fiber, 104 is high-speed photodetector, and 105 is vector network analyzer, and 106 is unidirectional current
Source.
Detailed description of the invention
For clearly demonstrating a kind of based on microwave photon technology the fiber dispersion coefficient of present invention offer
Measurement apparatus, is described further invention with accompanying drawing in conjunction with the embodiments, but should not limit this with this
Bright protection domain.
Embodiment 1
Use the measurement apparatus of fiber dispersion coefficient based on microwave photon technology as it is shown in figure 1, main
Photoelectric device parameter selects as follows:
The output of Wavelength tunable Distributed Feedback Laser 101 should be greater than 5mW, and wavelength regulation precision is excellent
In 0.4nm, extinction ratio is more than 20dB.
The operation wavelength of optical device should match with testing fiber operation wavelength.
The work process of measurement apparatus is as follows:
The polarized light of Wavelength tunable Distributed Feedback Laser 101 output is through intensity type electrooptic modulator 102.
First port 1 of network vector analyser 105 exports a frequency sweep radiofrequency signal and enters electrooptic modulator 102
Rf inputs.The operating point of electrooptic modulator 102 is regulated by DC source 106, changes
The output voltage of DC source 106 can change the offset operation point of electrooptic modulator, and then changes electricity
The output intensity of photomodulator 102.Electrooptic modulator 102 by incident rf-signal modulation to light wave
Above exporting a light and carry radiofrequency signal, this light carries radiofrequency signal and incides height after testing fiber 103
On speed photodetector 104, high-speed photodetector 104 converts optical signals into radiofrequency signal and connects
Enter to vector network analyzer 105 and be acquired and analyze.
When testing fiber is less than 10 meters, the electrooptic modulator 102 in measurement apparatus, high-speed light electrical resistivity survey
The frequency response surveying device 104 and vector network analyzer 105 should be greater than 30GHz.
This utility model, compared to existing optical measuring device, possesses measuring speed fast, certainty of measurement
Height, and not by advantages such as environmental factors are affected；Use the manipulator of altofrequency response, detector
With the accuracy that vector network analyzer can improve measurement.
Claims (6)
1. a fiber dispersion coefficient measurement apparatus, it is characterised in that: include the narrow line of Wavelength tunable DFB
Wide laser instrument (101), electrooptic modulator (102), testing fiber (103), high-speed photodetector
(104), vector network analyzer (105) and DC source (106)；Described Wavelength tunable DFB is narrow
Live width laser instrument (101), electrooptic modulator (102), high-speed photodetector (104) constitute one
Microwave photon link；The monochromatic polarized light that Wavelength tunable DFB narrow linewidth laser (101) sends is incident
To electrooptic modulator (102)；First port (1) output of vector network analyzer (105) sweeps
The radiofrequency signal of frequency enters electrooptic modulator (102)；This radiofrequency signal is added by electrooptic modulator (102)
Being downloaded on light wave export a light and carry radiofrequency signal, this light carries radiofrequency signal through testing fiber (103)
After incide on high-speed photodetector (104), optical signal is turned by high-speed photodetector (104)
Change radiofrequency signal into and be linked into vector network analyzer (105) and be acquired and analyze.
Fiber dispersion coefficient measurement apparatus the most according to claim 1, it is characterised in that: described
The tuning precision of Wavelength tunable DFB narrow linewidth laser (101) is higher than 0.4nm.
Fiber dispersion coefficient measurement apparatus the most according to claim 1, it is characterised in that: described
Electrooptic modulator (102) modulated signal is provided by vector network analyzer (105).
Fiber dispersion coefficient measurement apparatus the most according to claim 1, it is characterised in that: electric light
The DC bias signal of manipulator (102) is provided by DC source (106).
Fiber dispersion coefficient measurement apparatus the most according to claim 1, it is characterised in that: electric light
The input/output terminal of manipulator (102) is optical fiber.
Fiber dispersion coefficient measurement apparatus the most according to claim 1, it is characterised in that: described
Electrooptic modulator (102), high-speed photodetector (104) and vector network analyzer (105)
Frequency response is more than 30GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295535.0U CN205538163U (en) | 2016-04-08 | 2016-04-08 | Optical fiber dispersion coefficient measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295535.0U CN205538163U (en) | 2016-04-08 | 2016-04-08 | Optical fiber dispersion coefficient measuring device |
Publications (1)
| Publication Number | Publication Date |
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| CN205538163U true CN205538163U (en) | 2016-08-31 |
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| CN201620295535.0U Active CN205538163U (en) | 2016-04-08 | 2016-04-08 | Optical fiber dispersion coefficient measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271152A (en) * | 2017-07-25 | 2017-10-20 | 苏州润桐专利运营有限公司 | A kind of measuring method of the measuring system based on dispersive optical fiber abbe number |
| CN107894327A (en) * | 2017-11-15 | 2018-04-10 | 邓泽松 | A kind of measurement apparatus of fiber dispersion coefficient |
| WO2018126451A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Method for measuring optical fibre dispersion coefficient and network device |
| CN109373909A (en) * | 2018-11-28 | 2019-02-22 | 中航光电科技股份有限公司 | High-precision optical fiber length measuring system and measurement method |
| CN114665957A (en) * | 2022-03-22 | 2022-06-24 | 中国电子科技集团公司第三十八研究所 | System and method for measuring refractive index of optical fiber |
| US11652547B2 (en) | 2021-09-24 | 2023-05-16 | Huawei Technologies Co., Ltd. | Method and systems to identify types of fibers in an optical network |
-
2016
- 2016-04-08 CN CN201620295535.0U patent/CN205538163U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018126451A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Method for measuring optical fibre dispersion coefficient and network device |
| CN108603803A (en) * | 2017-01-06 | 2018-09-28 | 华为技术有限公司 | A kind of method and the network equipment measuring fiber dispersion coefficient |
| CN108603803B (en) * | 2017-01-06 | 2019-11-22 | 华为技术有限公司 | A kind of method and the network equipment measuring fiber dispersion coefficient |
| US10659153B2 (en) | 2017-01-06 | 2020-05-19 | Huawei Technologies Co., Ltd. | Method for measuring dispersion coefficient of optical fiber and network device |
| CN107271152A (en) * | 2017-07-25 | 2017-10-20 | 苏州润桐专利运营有限公司 | A kind of measuring method of the measuring system based on dispersive optical fiber abbe number |
| CN107271152B (en) * | 2017-07-25 | 2019-05-21 | 西安华兴搏发光电科技有限公司 | A kind of measurement method of the measuring system based on dispersive optical fiber abbe number |
| CN107894327A (en) * | 2017-11-15 | 2018-04-10 | 邓泽松 | A kind of measurement apparatus of fiber dispersion coefficient |
| CN109373909A (en) * | 2018-11-28 | 2019-02-22 | 中航光电科技股份有限公司 | High-precision optical fiber length measuring system and measurement method |
| US11652547B2 (en) | 2021-09-24 | 2023-05-16 | Huawei Technologies Co., Ltd. | Method and systems to identify types of fibers in an optical network |
| CN114665957A (en) * | 2022-03-22 | 2022-06-24 | 中国电子科技集团公司第三十八研究所 | System and method for measuring refractive index of optical fiber |
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