CN210375632U - Optical performance detection light path - Google Patents
Optical performance detection light path Download PDFInfo
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- CN210375632U CN210375632U CN201921330122.1U CN201921330122U CN210375632U CN 210375632 U CN210375632 U CN 210375632U CN 201921330122 U CN201921330122 U CN 201921330122U CN 210375632 U CN210375632 U CN 210375632U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 12
- XJUNRGGMKUAPAP-UHFFFAOYSA-N dioxido(dioxo)molybdenum;lead(2+) Chemical compound [Pb+2].[O-][Mo]([O-])(=O)=O XJUNRGGMKUAPAP-UHFFFAOYSA-N 0.000 claims description 7
- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical compound [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000835 fiber Substances 0.000 abstract description 8
- 238000002834 transmittance Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Abstract
The utility model provides an optical property detection light path, be connected with the first collimating lens of first optic fibre including the incident end, a first crystal for incidenting end outgoing natural light beam divides into P light beam and S light beam, the band pass filter of setting on the low reaches light path of P light beam and S light beam, the second crystal of setting on band pass filter' S transmission light path, establish on the emergent light low reaches path of second crystal and the second collimating lens that the emergent end is connected with second optic fibre, a photoelectric detector for detecting the emergent light of second optic fibre, first half-wave plate, second half-wave plate. The utility model provides an optical property detects light path utilizes two birefringent crystals, a band pass filter and two half-wave plates to realize the purpose of low-loss propagation, can improve the detection precision that detects the light path and can reach the purpose that detects the optical power that different wavelengths correspond through rotating band pass filter.
Description
Technical Field
The utility model relates to an optical detection device technical field especially relates to an optical property detects light path.
Background
At present, the optical performance of an optical device cannot be directly detected. The emergent light acted by the optical device is indirectly detected by adopting a certain light path structure. When optical parameters such as frequency, wavelength, and bandwidth of light are detected by using an optical path, the stability and low loss factor of the optical path structure are highly required. Once the interference is too large and the noise signal is too strong, it is difficult to ensure the accuracy of the optical detection.
The industry is continuously researching optical paths for reducing noise loss to achieve the purpose of high-precision optical performance detection.
Therefore, it is desirable to provide an optical performance detection optical path to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides an optical property detection light path, utilizes two birefringent crystals, a band pass filter and two half-wave plates to realize the purpose of low-loss propagation, can improve the detection precision that detects the light path and can reach the purpose that detects the luminous power that different wavelengths correspond through rotating band pass filter.
In order to solve the above technical problem, the utility model discloses a technical scheme provides an optical property detection light path, including the first collimating lens 1 that the incident end is connected with first optic fibre 9, a first crystal 2 that is used for separating the natural light beam of first collimating lens 1 outgoing into P light beam and S light beam, set up band-pass filter 3 on the downstream light path of P light beam and S light beam, set up on the transmission light path of band-pass filter 3 and be used for making P light beam and S light beam incidenting on it into a second crystal 4 of a natural light beam, set up on the emergent light downstream path of second crystal 4 and the exit end is connected with second collimating lens 5 of second optic fibre 10, a photoelectric detector 6 for detecting the emergent light of second optic fibre 10, a half wave plate 7 that is used for changing the S light beam of first crystal 2 outgoing into behind the P light beam to band-pass filter 3, And a second half-wave plate 8 provided on the transmission light path of the band pass filter 3 for converting one of the two P light beams transmitted by the band pass filter 3 into an S light beam.
In the examples, it is preferred that:
the first crystal 2 is a yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal.
In the examples, it is preferred that:
the second crystal 4 is a yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal.
The utility model has the advantages that:
the utility model provides a pair of optical property detection light path utilizes two birefringent crystals, a band pass filter and two half-wave plates to realize the purpose of low-loss propagation, guarantees that enough high light intensity incides on photoelectric detector, can improve the detection precision of detection light path and can reach the purpose that detects the luminous power that different wavelengths correspond through rotating band pass filter.
Drawings
Fig. 1 is a schematic structural diagram of a first preferred embodiment of an optical performance detection optical path according to the present invention.
Remarking: the arrow points on the drawings in the specification represent the propagation direction of light.
The numerical designations in the drawings of the specification correspond to the following component names, respectively:
1-a first collimating lens; 2-a first crystal; 3-band pass filter; 4-a second crystal; 5-a second collimating lens; 6-a photodetector; 7-a first half wave plate; 8-a second half-wave plate; 9-a first optical fiber; 10-second optical fiber.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the drawings.
Referring to fig. 1, the optical performance detection optical path of the present embodiment includes a first collimating lens 1 having an incident end connected to a first optical fiber 9, a first crystal 2 for separating a natural light beam emitted from the first collimating lens 1 into a P light beam and an S light beam, a band-pass filter 3 disposed on a downstream optical path of the P light beam and the S light beam, a second crystal 4 disposed on a transmission optical path of the band-pass filter 3 for combining the P light beam and the S light beam incident thereon into a natural light beam, a second collimating lens 5 disposed on an exit optical path of the second crystal 4 and having an exit end connected to a second optical fiber 10, a photodetector 6 for detecting an exit light of the second optical fiber 10, a first half-wave plate 7 for converting the S light beam emitted from the first transmission crystal 2 into the P light beam and then transmitting the P light beam onto the band-pass filter 3, and a second half-wave plate 7, And a second half-wave plate 8 provided on the transmission light path of the band pass filter 3 for converting one of the two P light beams transmitted by the band pass filter 3 into an S light beam.
The working principle of the optical performance detection optical path of the embodiment is as follows:
the method comprises the steps that natural light beams emitted by a light source are utilized to irradiate an optical device to be detected, after the natural light beams and the optical device act, the optical performance of the optical device to be detected can be reflected on the emitted light beams after the action, the emitted light beams are emitted to an optical performance detection light path of the embodiment, are firstly coupled into a first optical fiber 9, are transmitted to a first collimating lens 1 through the first optical fiber 9, are emitted after being collimated through the first collimating lens 1, are split into P light beams and S light beams through the double refraction effect of a first crystal 1, and are converted into the P light beams through a first half-wave plate 7; two bundles of P light beam incide band pass filter 3 on, after band pass filter 3 transmission, a bundle of P light beam wherein changes into S light beam through second half-wave plate 8 again, and band pass filter 3 transmission light P light beam and S light beam on the propagation path incide into in second crystal 4, and second crystal 4 is the birefringent crystal equally, and through the effect of second crystal 4, P light beam and S light beam combine into a beam of natural light beam, in the natural light beam enters into second optic fibre 10 by the coupling of second collimating lens 5, on the photosensitive probe of photoelectric detector 6 is leaded light by second optic fibre 10 again, utilizes spectral analyser or other data analysis equipment again, just can the analysis obtain the optical power that different wavelength correspond, through this kind of optical path structure, just can detect optical device' S performance.
In the optical performance detection optical path of the present embodiment, in the process of detecting the optical performance of the optical device, the bandpass filter 3 is rotated, so that the central wavelength of the transmitted light is changed, and then the optical power corresponding to different wavelengths can be detected.
The optical performance detection optical path of the embodiment can be used for measuring the spectrum of the optical device, so that the loss, the transmission bandwidth, the cut-off bandwidth, the isolation degree, the directivity and the like of the optical device can be known.
When the P-ray beam is incident on the bandpass filter 3, the transmittance and reflectance change little with the change in the incident angle of the P-ray beam. When the S light beam is incident on the band pass filter 3, the transmittance and reflectance vary greatly, and the transmittance approaches zero when the incident angle reaches the brewster angle. Therefore, in the present embodiment, the first half-wave plate 7 is used to convert the S light beam into the P light beam, and then the P light beam enters the band pass filter 3. The first half-wave plate 7 is used to reduce the transmission of light incident on the band pass filter 3 to the maximum extent without being limited to the polarization state, thereby improving the detection accuracy.
In this embodiment, in order to combine two beams of light transmitted from the band pass filter 3 into one natural light beam, and then couple the natural light beam to the second optical fiber 10 through the second collimating lens 5 to be incident on the photosensitive probe of the photodetector, the second half-wave plate 8 is disposed on the incident path of the second crystal 4 to convert one of the P light beams into the S light beam.
In an embodiment of the present invention, the first crystal 2 is a yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal; the second crystal 4 is a yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal.
Of course, in other embodiments of the present invention, the first crystal 2 and the second crystal 4 may be replaced by birefringent crystals of other materials, and are not limited to yttrium vanadate birefringent crystals or lead molybdate birefringent crystals.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same principle as the protection scope of the present invention.
Claims (3)
1. An optical performance detection circuit, comprising:
the optical fiber laser comprises a first collimating lens (1) with an incident end connected with a first optical fiber (9), a first crystal (2) used for separating a natural light beam emitted by the first collimating lens (1) into a P light beam and an S light beam, a band-pass filter (3) arranged on a downstream light path of the P light beam and the S light beam, a second crystal (4) arranged on a transmission light path of the band-pass filter (3) and used for combining the P light beam and the S light beam incident thereon into a natural light beam, a second collimating lens (5) arranged on an emergent light downstream path of the second crystal (4) and with an emergent end connected with a second optical fiber (10), a photoelectric detector (6) used for detecting emergent light of the second optical fiber (10), a first half wave plate (7) used for converting the S light beam emitted from the first crystal (2) into the P light beam and then transmitting the P light beam onto the band-pass filter (3), a second half wave plate (7), And a second half-wave plate (8) which is arranged on the transmission light path of the band-pass filter (3) and is used for converting one of the two P light beams transmitted by the band-pass filter (3) into an S light beam.
2. The optical performance detection circuit of claim 1, wherein: the first crystal (2) is an yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal.
3. The optical performance detection optical path of claim 1 or 2, wherein: the second crystal (4) is an yttrium vanadate birefringent crystal or a lead molybdate birefringent crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921330122.1U CN210375632U (en) | 2019-08-15 | 2019-08-15 | Optical performance detection light path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921330122.1U CN210375632U (en) | 2019-08-15 | 2019-08-15 | Optical performance detection light path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210375632U true CN210375632U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921330122.1U Active CN210375632U (en) | 2019-08-15 | 2019-08-15 | Optical performance detection light path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210375632U (en) |
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2019
- 2019-08-15 CN CN201921330122.1U patent/CN210375632U/en active Active
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