CN204439530U - The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM - Google Patents
The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM Download PDFInfo
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- CN204439530U CN204439530U CN201520141200.9U CN201520141200U CN204439530U CN 204439530 U CN204439530 U CN 204439530U CN 201520141200 U CN201520141200 U CN 201520141200U CN 204439530 U CN204439530 U CN 204439530U
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Abstract
The utility model discloses a kind of polarimeter measuring optically-active solution concentration based on fiber annular cavity-type BPM, amplitude modulation laser device, the polarizer, optic fiber ring-shaped cavity, analyzer and photodetector is provided with successively along light transmission direction, wherein amplitude modulation laser device is connected with modulating signal source by circuit, photodetector is connected with digital signal processor by circuit, optic fiber ring-shaped cavity is formed by two fiber couplers and one section of Fiber connection, and profile of optic fibre is provided with space microcavity and is provided with absorption of sample pond at this microcavity place, space.The utility model is highly sensitive, and structure is simple, compact, the accurate measurement to polytype especially low concentration optically-active solution can be realized, and measuring process simplifies, convenient and swift, effectively overcomes the loaded down with trivial details flow process existed in traditional optically-active solution measuring method.
Description
Technical field
The utility model belongs to optically-active solution concentration measurement mechanism technical field, is specifically related to a kind of polarimeter measuring optically-active solution concentration based on fiber annular cavity-type BPM.
Background technology
Often utilize polarimetry to carry out measurement of concetration to different optical active substances at present, but the high precision polarimeter that on market, cost performance is high is also rare.Due to the impact such as concentration of the wavelength of the specific rotation light of optical active substance, temperature and solution, the error measured seriously will be caused; Though and the survey instruments such as small polarimeter, polarimeter, portable polarimeter are continued to optimize, measuring accuracy and volume are still difficult to mate; Wherein some instrument is only applicable to physical property experiment aspect, and relatively accurate and widely used instrument not only requires high to measuring system parts precision, and price is very expensive.
Summary of the invention
The technical matters that the utility model solves there is provided a kind of polarimeter measuring optically-active solution concentration based on fiber annular cavity-type BPM, and this polarimeter swings the measurement of waveform realization to polytype optically-active solution concentration by analyzing light decay.
The utility model adopts following technical scheme for solving the problems of the technologies described above, the polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM, it is characterized in that: be provided with amplitude modulation laser device successively along light transmission direction, the polarizer, optic fiber ring-shaped cavity, analyzer and photodetector, wherein amplitude modulation laser device is connected with modulating signal source by circuit, photodetector is connected with digital signal processor by circuit, optic fiber ring-shaped cavity is formed by two fiber couplers and one section of Fiber connection, profile of optic fibre is provided with space microcavity and is provided with absorption of sample pond at this microcavity place, space.
The utility model is highly sensitive, and structure is simple, compact, the accurate measurement to polytype especially low concentration optically-active solution can be realized, and measuring process simplifies, convenient and swift, effectively overcomes the loaded down with trivial details flow process existed in traditional optically-active solution measuring method.
Accompanying drawing explanation
Fig. 1 is light path principle figure of the present utility model.
Drawing illustrates: 1, amplitude modulation laser device, 2, the polarizer, 3, fiber coupler, 4, absorption of sample pond, 5, analyzer, 6, photodetector, 7, modulating signal source, 8, digital signal processor, 9, optical fiber.
Embodiment
Describe particular content of the present utility model by reference to the accompanying drawings in detail.The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM, amplitude modulation laser device 1, the polarizer 2, optic fiber ring-shaped cavity, analyzer 5 and photodetector 6 is provided with successively along light transmission direction, wherein amplitude modulation laser device 1 is connected with modulating signal source 7 by circuit, photodetector 6 is connected with digital signal processor 8 by circuit, optic fiber ring-shaped cavity is formed by connecting by two fiber couplers 3 and one section of optical fiber 9, and optical fiber 9 section is provided with space microcavity and is provided with absorption of sample pond 4 at this microcavity place, space.
(1) fiber annular cavity-type BPM system
Fiber annular cavity-type BPM optically-active system for solution concentration measurement is formed by modulating signal source, amplitude modulation laser device, the polarizer, analyzer, fiber coupler, absorption of sample pond, photodetector and digital signal processor.
(2) bending loss of optical fiber and solution concentration are measured
First, decline and swing in chamber when not adding solution, allow amplitude modulation light source enter optic fiber ring-shaped cavity through the polarizer and fiber coupler, then exported by another fiber coupler, measure because declining of fibre-optical bending swings reference waveform finally by analyzer, photodetector; Then allow optical fiber polarisation signal through the optically-active solution of variable concentrations, because amplitude modulation light source forms polarized light in optic fiber ring-shaped cavity, when polarized light produces optically-active angle after optically-active solution, this optical signal exports and record through a fiber coupler part, and another part continues back light fibre annular-type cavity, when light can produce optically-active deflection again through solution again, output intensity also changes thereupon, repeatedly after circulation, until light intensity signal decays to zero, swing waveform by corresponding the declining of oscillograph Real Time Observation.
(3) data acquisition and processing (DAP)
Observe while declining and swinging waveform, through digital signal processor, parameter acquisition, storage processing are carried out to the simulating signal exported.When optically-active solution material one timing, change optically-active solution concentration can obtain different declining and swing curve of output and sampled value, declining during record variety classes optically-active solution variable concentrations swings output, thus obtain the corresponding relation of measured each parameter and solution concentration, eventually pass the RBF algorithm calibration approaching normal concentration and obtain tested optically-active solution concentration value.
More than show and describe ultimate principle of the present utility model; principal character and advantage; under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present utility model.
Claims (1)
1. the polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM, it is characterized in that: be provided with amplitude modulation laser device, the polarizer, optic fiber ring-shaped cavity, analyzer and photodetector successively along light transmission direction, wherein amplitude modulation laser device is connected with modulating signal source by circuit, photodetector is connected with digital signal processor by circuit, optic fiber ring-shaped cavity is formed by two fiber couplers and one section of Fiber connection, and profile of optic fibre is provided with space microcavity and is provided with absorption of sample pond at this microcavity place, space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141200.9U CN204439530U (en) | 2015-03-13 | 2015-03-13 | The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141200.9U CN204439530U (en) | 2015-03-13 | 2015-03-13 | The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM |
Publications (1)
| Publication Number | Publication Date |
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| CN204439530U true CN204439530U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520141200.9U Expired - Fee Related CN204439530U (en) | 2015-03-13 | 2015-03-13 | The polarimeter of optically-active solution concentration is measured based on fiber annular cavity-type BPM |
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| CN (1) | CN204439530U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092481A (en) * | 2015-09-02 | 2015-11-25 | 河南师范大学 | Method for measuring concentrations of optical rotation solutions through optical fiber ring cavity ringdown |
| CN106290252A (en) * | 2016-08-16 | 2017-01-04 | 河南师范大学 | A kind of containing coreless fiber utilize optical fiber decline swing chamber measure optically-active solution concentration method |
-
2015
- 2015-03-13 CN CN201520141200.9U patent/CN204439530U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092481A (en) * | 2015-09-02 | 2015-11-25 | 河南师范大学 | Method for measuring concentrations of optical rotation solutions through optical fiber ring cavity ringdown |
| CN106290252A (en) * | 2016-08-16 | 2017-01-04 | 河南师范大学 | A kind of containing coreless fiber utilize optical fiber decline swing chamber measure optically-active solution concentration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20160313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |