CN214067424U - High-power optical filter device - Google Patents
High-power optical filter device Download PDFInfo
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- CN214067424U CN214067424U CN202023203646.XU CN202023203646U CN214067424U CN 214067424 U CN214067424 U CN 214067424U CN 202023203646 U CN202023203646 U CN 202023203646U CN 214067424 U CN214067424 U CN 214067424U
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- broadband filter
- pass broadband
- collimator
- filter
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Abstract
The utility model provides a high power optical filter, including first collimater, high pass broadband filter and the low pass broadband filter that arranges along the light path direction in proper order, the transmission wavelength of high pass broadband filter is less than the transmission wavelength of low pass broadband filter, first collimater, high pass broadband filter and low pass broadband filter interval separation arrangement. Through adopting high pass broadband filter and low pass broadband filter, can realize the effect of band-pass filtering, and avoid the thermal lens effect that the rete leads to too thick, facula quality degradation, transmission wavelength skew scheduling problem to effectively improve output beam quality.
Description
Technical Field
The utility model relates to an optical device field especially relates to a high power optical filter.
Background
The band-pass filter is a filter with adjacent cut-off bands at two sides of a transmission band of a spectral characteristic curve and is used for improving the purity of signal light and filtering out unwanted optical signals. The band-pass filter is roughly divided into a broadband filter and a narrowband filter according to spectral characteristics, is prepared by applying a light wave interference principle, and adopts high-low refractive index alternate coating on a substrate material to realize filtering of specific wavelength and bandwidth. As the bandwidth is narrowed, the number of layers of the film layer increases, for example, the DWDM filter of about 0.4nm bandwidth, and the number of the film layers exceeds hundreds of layers, which causes deformation of the substrate material and large loss.
Therefore, the number of the film layers of the thin-film band-pass filter increases with the narrowing of the transmission bandwidth, and the thickening of the film layers increases the absorption of light, generates heat in local areas, and causes problems such as thermal lens effect, deterioration of light spot quality, and transmission wavelength shift in high-power application.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high power optical filter with high output beam quality.
In order to realize the utility model discloses the purpose, the utility model provides a high power light filter device, including first collimater, high pass broadband filter plate and the low pass broadband filter plate of arranging along the light path direction in proper order, the transmission wavelength of high pass broadband filter plate is less than the transmission wavelength of low pass broadband filter plate, and first collimater, high pass broadband filter plate and low pass broadband filter plate interval separation are arranged.
According to a further scheme, the high-power optical filter device further comprises a fixing pipe, a mounting hole penetrates through the fixing pipe along the axial direction, and the first collimator, the high-pass broadband filter and the low-pass broadband filter are mounted in the mounting hole.
In a further proposal, the fixed pipe is arranged in a circular pipe; the high-power optical filter device further comprises an arc-shaped plate, the arc-shaped plate is provided with an arc-shaped bottom surface and a mounting plane, the arc-shaped bottom surface is mounted on the inner wall of the fixed pipe, and the high-pass broadband filter plate and the low-pass broadband filter plate are mounted on the mounting plane.
In a further aspect, the outer seal of the first collimator is clearance fit with the mounting hole.
In a further aspect, the first collimator is a single fiber collimator.
According to a further scheme, the high-power optical filtering device further comprises a second collimator arranged in the fixed tube, and the first collimator, the high-pass broadband filter, the low-pass broadband filter and the second collimator are sequentially arranged along the direction of the light path.
In a further aspect, the outer seal of the second collimator is clearance fit with the mounting hole.
In a further aspect, the second collimator is a single fiber collimator.
The beneficial effects of the utility model are that, the present case is through adopting high pass broadband filter and low pass broadband filter, and incident transmission wavelength and bandwidth through the design filter, signal light is successively behind two filters, can realize band-pass filter's effect, utilize the filter along with the incident angle increase, the spectrum toward the characteristics of shortwave skew, through setting for the different contained angle of filter, can change the bandwidth of filter, realize narrowband filter's effect, utilize the broadband filter to realize narrowband filter's effect, avoid the thermal lens effect that the rete leads to too thickly, facula quality degradation, transmission wavelength skew scheduling problem, thereby effectively improve the output light beam quality.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the high power optical filter device of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the high power optical filter device of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
First embodiment of high power optical filter device:
referring to fig. 1, the high-power optical filter device includes a first collimator 11, a high-pass broadband filter 12, a low-pass broadband filter 13, and a second collimator 14, which are sequentially arranged along a light path direction, where the first collimator 11 and the second collimator 14 are single fiber collimators. The first collimator 11 includes an optical fiber 111, a capillary 112 and a lens 113, the optical fiber 111 extending into the capillary 112, the capillary 112 and the lens 113 being spaced and inclined opposite to each other, and the output end of the lens 113 facing the high-bandwidth filter 12. The second collimator 14 includes an optical fiber 141, a capillary 142 and a lens 143, the optical fiber 141 extends into the capillary 142, the capillary 142 and the lens 143 are spaced and inclined opposite to each other, and an output end of the lens 143 faces the low-pass broadband filter 13.
High power light filter still includes fixed pipe 15 and arc 16, fixed pipe 15 is the pipe and arranges, fixed pipe 15 runs through along the axial and is provided with the mounting hole, arc 16 is provided with arc bottom surface and mounting plane, the arc bottom surface is installed on the inner wall of fixed pipe 15, high pass broadband filter 12 and low pass broadband filter 13 are installed on the mounting plane, first collimator 11's outer seal and mounting hole clearance fit, second collimator 14's outer seal and mounting hole clearance fit, then realize first collimator 11, high pass broadband filter 12, low pass broadband filter 13 and second collimator 14 are installed in the mounting hole steadily, and first collimator 11, high pass broadband filter 12, low pass broadband filter 13 and second collimator 14 interval separation arrangement.
In the specific setting of the transmission wavelength, the transmission wavelength of the high-pass broadband filter 12 is λ 1, and then the signal light passing through the high-pass broadband filter 12 is filtered if the wavelength is less than λ 1, and is transmitted if the wavelength is greater than or equal to λ 1, so that the signal light output of the wavelength greater than or equal to λ 1 is realized. The transmission wavelength of the low-pass broadband filter 13 is λ 2, and then the signal light passing through the low-pass broadband filter 13 is filtered if the wavelength is greater than λ 2, and is transmitted if the wavelength is less than or equal to λ 2, so that the signal light output of the wavelength less than or equal to λ 2 is realized. And the transmission wavelength lambda 1 of the high-pass broadband filter 12 of the present case is smaller than the transmission wavelength lambda 2 of the low-pass broadband filter 13.
When signal light is input into the first collimator 11, the signal light sequentially passes through the high-pass broadband filter 12 and the low-pass broadband filter 13, and then is coupled into the second collimator 14 to be output, and after the signal light passes through the band-pass filter, the second collimator 14 outputs the signal light through the band-pass filter with the wavelength between λ 1 and λ 2 as shown in fig. 1.
Of course, according to the reversibility of the optical path, the second collimator 14 may also be used as an input end of the signal light, so that the light sequentially passes through the low-pass broadband filter 13 and the high-pass broadband filter 12, and then is coupled into the first collimator 11 and then output.
Second embodiment of high power optical filter device:
on the basis of the first embodiment, second collimator 14 may not be adopted in the second embodiment, that is, as shown in fig. 2, that is, first collimator 11, high-pass broadband filter 12 and low-pass broadband filter 13 are sequentially arranged in fixed pipe 15, high-pass broadband filter 12 and low-pass broadband filter 13 are respectively and directly mounted on the inner wall of fixed pipe 15, high-pass broadband filter 12 is located in the middle of the fixed pipe, low-pass broadband filter 13 is located at the end of fixed pipe 15, the end opening of fixed pipe 15 can be plugged by clearance fit, and therefore the working stability of the device is improved, and after signal light passes through high-pass broadband filter 12 and low-pass broadband filter 13, signal light with the output wavelength between λ 1 and λ 2 is output.
Therefore, the high-pass broadband filter and the low-pass broadband filter are adopted, and by designing the incident transmission wavelength and the bandwidth of the filters, the signal light can realize the effect of band-pass filtering after passing through the two filters in sequence. Utilize the filter plate along with incident angle increase, the spectrum toward the characteristics of shortwave skew, through setting for the different contained angles of filter plate, can change the bandwidth of filter plate, realize the effect of narrowband filtering, utilize the broadband filter plate to realize the effect of narrowband filtering, avoid the thermal lens effect that the rete leads to too thickly, facula quality degradation, transmission wavelength skew scheduling problem to effectively improve the output beam quality.
Claims (8)
1. High power optical filter, its characterized in that, including first collimater, high pass broadband filter and the low pass broadband filter that arranges along the light path direction in proper order, the transmission wavelength of high pass broadband filter is less than the transmission wavelength of low pass broadband filter, first collimater high pass broadband filter with low pass broadband filter interval separation arrangement.
2. The high power optical filter device of claim 1, wherein:
the high-power optical filter device further comprises a fixing pipe, the fixing pipe penetrates through the mounting hole along the axial direction, and the first collimator, the high-pass broadband filter plate and the low-pass broadband filter plate are mounted in the mounting hole.
3. The high power optical filter device of claim 2, wherein:
the fixed pipe is arranged in a circular pipe;
high power light filter still includes the arc, the arc is provided with arc bottom surface and mounting surface, the arc bottom surface is installed on the inner wall of fixed pipe, high pass broadband filter with low pass broadband filter installs on the mounting surface.
4. The high power optical filter device of claim 2, wherein:
the outer seal of the first collimator is in clearance fit with the mounting hole.
5. The high power optical filter device according to claim 4, wherein:
the first collimator is a single optical fiber collimator.
6. The high power optical filter device according to any one of claims 2 to 5, wherein:
the high-power optical filter device further comprises a second collimator arranged in the fixed pipe, and the first collimator, the high-pass broadband filter plate, the low-pass broadband filter plate and the second collimator are sequentially arranged along the direction of a light path.
7. The high power optical filter device of claim 6, wherein:
and the outer seal of the second collimator is in clearance fit with the mounting hole.
8. The high power optical filter device of claim 7, wherein:
the second collimator is a single optical fiber collimator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023203646.XU CN214067424U (en) | 2020-12-24 | 2020-12-24 | High-power optical filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023203646.XU CN214067424U (en) | 2020-12-24 | 2020-12-24 | High-power optical filter device |
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| CN214067424U true CN214067424U (en) | 2021-08-27 |
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| CN202023203646.XU Active CN214067424U (en) | 2020-12-24 | 2020-12-24 | High-power optical filter device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917630A (en) * | 2021-10-19 | 2022-01-11 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical module spectrum shaping method |
| CN114859475A (en) * | 2022-05-25 | 2022-08-05 | 珠海光焱科技有限公司 | High-power bandwidth filter |
-
2020
- 2020-12-24 CN CN202023203646.XU patent/CN214067424U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917630A (en) * | 2021-10-19 | 2022-01-11 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical module spectrum shaping method |
| CN113917630B (en) * | 2021-10-19 | 2023-08-08 | 青岛海信宽带多媒体技术有限公司 | Optical module and optical module spectrum shaping method |
| CN114859475A (en) * | 2022-05-25 | 2022-08-05 | 珠海光焱科技有限公司 | High-power bandwidth filter |
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