CN213043683U - Spectrum detection device for realizing high SNR and high resolution - Google Patents
Spectrum detection device for realizing high SNR and high resolution Download PDFInfo
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- CN213043683U CN213043683U CN202022085958.9U CN202022085958U CN213043683U CN 213043683 U CN213043683 U CN 213043683U CN 202022085958 U CN202022085958 U CN 202022085958U CN 213043683 U CN213043683 U CN 213043683U
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Abstract
The utility model discloses a realize spectral detection device of high SNR and high resolution, include for the device: the first collimation system is used for collimating input light for the first time and outputting parallel light; the light splitting component is used for carrying out first spatial separation on the parallel light; a first focusing system for focusing the separated light for a first time; the light path switch is used for gating the light after the light is focused for the first time; the second collimation system is used for carrying out second collimation on the light after the first gating, and the collimated light enters the light splitting assembly again for carrying out second spatial separation; a mirror group for changing the light path of the light after the second separation; the second focusing system is used for carrying out second focusing on the light output by the reflector group, and the light after the second focusing enters the light path switch again for carrying out second gating; and the photoelectric detection system is used for performing spectrum detection on the light after the second gating. The utility model discloses reduced the not enough problem of SNR that the spectrum overlapping leads to when promoting the resolution ratio of spectrum.
Description
Technical Field
The utility model belongs to the technical field of optics and specifically relates to an improve spectral detection device of SNR and resolution ratio.
Background
With the development of information technology and the continuous improvement of communication speed and quality, the capacity and speed of an optical fiber communication improving system are inevitable development trends, meanwhile, a large-capacity space, a higher speed and a larger bandwidth are inevitable development trends of future optical fiber communication technology, how to ensure the optical communication quality is very important, and the performance of an optical channel is mainly detected in real time by using a spectrum detection principle in the prior art at present, so that the quality of a communication link is monitored. The technical solutions related to patents CN200810098611, CN201711218057 and CN201720236138 have the characteristics of rapidness and stability, but have large volume and low precision, and at the same time, the cost is high by using an array detector, which is a conventional method as shown in fig. 1. The optical spatial cell path selection switch referred to in patent CN201821168962.8 implements optical filtering and detection, but has drawbacks in resolution and SNR.
SUMMERY OF THE UTILITY MODEL
The resolution ratio to spectral detection among the prior art is not high, the defect that the SNR is low, the utility model provides a can realize high SNR and high resolution spectral detection device.
The utility model provides a technical scheme that its technical problem adopted is:
provided is a spectral detection device that achieves high SNR and high resolution, including:
the first collimation system is used for collimating input light for the first time and outputting parallel light;
the light splitting component is used for carrying out first spatial separation on the parallel light;
a first focusing system for focusing the separated light for a first time;
the light path switch is used for gating the light after the light is focused for the first time;
the second collimation system is used for carrying out second collimation on the light after the first gating, and the collimated light enters the light splitting assembly again for carrying out second spatial separation;
a mirror group for changing the light path of the light after the second separation;
the second focusing system is used for carrying out second focusing on the light output by the reflector group, and the light after the second focusing enters the light path switch again for carrying out second gating;
and the photoelectric detection system is used for performing spectrum detection on the light after the second gating.
In connection with the above technical solution, the spectrum detection apparatus further includes a driving controller connected to the optical path switch for controlling the optical path switch to gate different spectra.
According to the technical scheme, the reflector group comprises a first reflector and a second reflector.
According to the technical scheme, the photoelectric detection system comprises a photoelectric detector and a spectrum detector which are connected, wherein the photoelectric detector is connected with the light path switch.
The utility model discloses the beneficial effect who produces is: the utility model discloses the well light has passed through twice beam splitting subassembly and light path switch module, has ensured the enough division of the distance branch between the different spectra, has reduced the not enough problem of the SNR that the spectrum overlapping leads to in the resolution ratio of promotion spectrum.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a schematic diagram of a prior art spectral detection apparatus;
fig. 2 is a schematic structural diagram of a spectrum detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In order to provide a simple structure, the resolution ratio and the high SNR of promotion spectrum, the utility model provides a spectrum detection device who possesses very strong using value's improvement SNR and resolution ratio.
The utility model discloses first embodiment realizes that high SNR and high resolution spectral detection device include first collimation system, beam split subassembly, first focus system, light path switch, second collimation system, speculum group, second focus system and photoelectric detection system.
Wherein:
the first collimation system is used for collimating input light for the first time and outputting parallel light;
the light splitting component is used for carrying out first spatial separation on the parallel light;
a first focusing system for focusing the separated light for a first time;
the light path switch is used for gating the light after the light is focused for the first time;
the second collimation system is used for carrying out second collimation on the light after the first gating, and the collimated light enters the light splitting assembly again for carrying out second spatial separation;
a mirror group for changing the light path of the light after the second separation; the direction of the light path is changed as required.
The second focusing system is used for carrying out second focusing on the light output by the reflector group, and the light after the second focusing enters the light path switch again for carrying out second gating; the first time is rough concentration, and the second time is fine concentration; and the second is a culling on a first basis. Both focusing systems can be realized by a condenser lens group.
And the photoelectric detection system is used for performing spectrum detection on the light after the second gating.
As shown in fig. 1, for the spectrum detection device according to the second embodiment of the present invention, the spectrum detection device includes a collimating system 1, a light splitting assembly 2, a focusing system 3, a light path switch 4, a reflecting mirror 5, a reflecting mirror 6, a collimating system 7, a focusing system 8, a driving controller 9, a photoelectric detector 10, and a photoelectric detector 11.
After being input, the light is collimated by the collimating system 1, converted into parallel light and then enters the light splitting component 2 for light splitting, so that the separation of different spectrums is realized; then the separated light enters a focusing system 3 for focusing and then enters a light path switch 4; different spectrum regions are gated through the light path switch 4, the passed spectrum enters the light splitting component 2 after being collimated through the collimating system 7, and the spectrum is further split, so that the space between different spectra is further enlarged, and the problems of resolution reduction and low SNR (signal to noise ratio) caused by spectrum overlapping are effectively solved; the light after the light splitting is reflected to a reflector 6 after passing through a reflector 5, the spectrum reflected by the reflector 6 is converged to a light path switch 4 after passing through a gathering 8, the drive controller 9 is utilized to control the light path switch 4 to gate different spectrums, and the gated spectrum enters a photoelectric detection system to realize spectrum detection.
The utility model discloses well 2 times is through beam splitting subassembly 2 and light path switch module 4, can ensure the enough division of the distance branch between the spectrum of difference, promotes the resolution ratio of spectrum, has reduced the not enough problem of the SNR that the spectrum overlapping leads to simultaneously.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (4)
1. A spectral detection apparatus that achieves high SNR and high resolution, comprising:
the first collimation system is used for collimating input light for the first time and outputting parallel light;
the light splitting component is used for carrying out first spatial separation on the parallel light;
a first focusing system for focusing the separated light for a first time;
the light path switch is used for gating the light after the light is focused for the first time;
the second collimation system is used for carrying out second collimation on the light after the first gating, and the collimated light enters the light splitting assembly again for carrying out second spatial separation;
a mirror group for changing the light path of the light after the second separation;
the second focusing system is used for carrying out second focusing on the light output by the reflector group, and the light after the second focusing enters the light path switch again for carrying out second gating;
and the photoelectric detection system is used for performing spectrum detection on the light after the second gating.
2. The apparatus according to claim 1, further comprising a driving controller connected to the optical switch for controlling the optical switch to gate different optical spectra.
3. The spectral detection apparatus of claim 1, wherein the set of mirrors comprises a first mirror and a second mirror.
4. The apparatus according to claim 1, wherein the photodetector system comprises a photodetector and a spectrum detector connected together, wherein the photodetector is connected to the optical switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022085958.9U CN213043683U (en) | 2020-09-22 | 2020-09-22 | Spectrum detection device for realizing high SNR and high resolution |
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| CN202022085958.9U CN213043683U (en) | 2020-09-22 | 2020-09-22 | Spectrum detection device for realizing high SNR and high resolution |
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| CN213043683U true CN213043683U (en) | 2021-04-23 |
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| CN202022085958.9U Active CN213043683U (en) | 2020-09-22 | 2020-09-22 | Spectrum detection device for realizing high SNR and high resolution |
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