CN210954426U - Optical device with narrow pass band - Google Patents
Optical device with narrow pass band Download PDFInfo
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- CN210954426U CN210954426U CN201922425814.0U CN201922425814U CN210954426U CN 210954426 U CN210954426 U CN 210954426U CN 201922425814 U CN201922425814 U CN 201922425814U CN 210954426 U CN210954426 U CN 210954426U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 105
- 239000013307 optical fiber Substances 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 abstract description 9
- 230000005693 optoelectronics Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
An optical device with a narrow passband comprises a base, and a 0-degree optical filter and a 45-degree optical filter which are arranged in the base, wherein a receiving light transmitting hole is formed above the inside of the base, and the 0-degree optical filter is opposite to the receiving light transmitting hole; a transmitting light through hole and a transmitting and receiving light through hole are symmetrically formed in the left side and the right side of the interior of the base, a light generator with a TEC is installed in the transmitting light through hole, and an optical fiber adapter is arranged in the transmitting and receiving light through hole; the 45-degree optical filter is positioned between the emission light-transmitting hole and the receiving and transmitting light-transmitting hole and forms an angle of 45 degrees with the 0-degree optical filter; the 45-degree optical filter is 1.4mm long, 1.4mm wide and 0.6mm thick, and the 0-degree optical filter is 1.6mm long, 1.6mm wide and 0.3mm thick. The utility model aims at providing an optical device with narrow passband can accomplish the passband and be positive 2.5nm, burden 4.5nm, makes a plurality of wavelengths can not mutual interference after wavelength division multiplexing and demultiplexing, guarantees that the communication is normal.
Description
Technical Field
The utility model relates to an optical communication device technical field mainly relates to an optical device with narrow passband.
Background
In this era of optical communication, a wavelength division multiplexer is one of passive devices and also one of core devices for optical fiber communication transmission. Wavelength division multiplexers function to combine light of different wavelengths on different fibers into one fiber for transmission, or to separate multiple wavelengths on the same fiber. More simply, the wavelength division multiplexer functions to combine or separate wavelengths.
The passband of the existing wavelength division multiplexer is relatively wide, so that when a plurality of wavelengths are transmitted, mutual interference easily occurs between adjacent wavelengths, and the communication quality is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an optical device with narrow passband can accomplish the passband of center wavelength and be positive 2.5nm, burden 4.5nm for the light of a plurality of wavelengths can not mutual interference after wavelength division multiplexing and demultiplexing, guarantees that the communication is normal.
The utility model discloses a following technical scheme realizes:
an optical device with a narrow passband comprises a base and a wavelength division multiplexer arranged inside the base, wherein the wavelength division multiplexer comprises a 0-degree optical filter and a 45-degree optical filter, a receiving light through hole is formed above the inside of the base, and the 0-degree optical filter is opposite to the receiving light through hole; an emission light through hole and a receiving and transmitting light through hole are symmetrically formed in the left side and the right side of the interior of the base, a light generator with a TEC and an optical isolator are sequentially installed in the emission light through hole from left to right, and an optical fiber adapter is arranged in the receiving and transmitting light through hole; the 45-degree optical filter is positioned between the emission light-transmitting hole and the receiving and transmitting light-transmitting hole and forms an angle of 45 degrees with the 0-degree optical filter; the 45-degree optical filter is 1.4mm long, 1.4mm wide and 0.6mm thick, and the 0-degree optical filter is 1.6mm long, 1.6mm wide and 0.3mm thick.
The light emitter with the TEC is adopted, so that the change of the wavelength of light emitted by the light generator is smaller than 0.2nm when the light generator works at the full temperature, and meanwhile, through multiple times of experiments and verification, the 45-degree optical filter 3 with the size of 1.4X 0.6 and the 0-degree optical filter 2 with the size of 1.6X 0.3 are selected, so that the passband of the wavelength of light emitted by the light generator can reach plus 2.5nm and minus 4.5nm, the light with multiple wavelengths cannot interfere with each other after being combined by the optical filters, and the normal communication is ensured.
When the optoelectronic device with the narrow passband is used, if a light source enters the optoelectronic device with the narrow passband from the transmitting and receiving light transmitting hole, the light source is reflected onto the 0-degree optical filter through the 45-degree optical filter, and leaves the optoelectronic device with the narrow passband from the receiving light transmitting hole; if the light source is emitted from the light generator, after being transmitted by the 45-degree filter, the light source leaves the optoelectronic device with the narrow passband from the light transceiving and transmitting hole.
The optical filter is also called interference filter, is used for selecting optical devices of required radiation wave bands, mainly utilizes the interference principle of light to obtain the transmission action of spectrum, and the optical filter deposits films with different refractive indexes on an optical substrate by a vacuum coating method so as to achieve different optical effects. When a mixture of light of multiple wavelengths passes through the optical filter, interference effects occur due to different refractive indexes, resulting in a very high transmittance of light of a specific wavelength while light of other wavelengths is reflected and absorbed.
In the scheme, the optical passband of the photoelectronic device with the narrow passband can be adjusted to be plus 2.5nm and minus 4.5nm by selecting the proper 45-degree optical filter and 0-degree optical filter, so that light with multiple wavelengths cannot interfere with each other after passing through the photoelectronic device, and normal communication is ensured.
Furthermore, a 0-degree filter support is arranged below the light output hole, two ends of the 0-degree filter support are fixed on the inner wall of the base, and the 0-degree filter is adhered to the 0-degree filter support.
Furthermore, the 0-degree optical filter bracket is in a concave shape, a through hole is formed in the middle of the inner bottom surface of the 0-degree optical filter bracket, and the 0-degree optical filter is adhered to the inner bottom surface of the 0-degree optical filter bracket. The 0-degree optical filter support is arranged in a concave shape, and the bottom surface of the 0-degree optical filter can be firmly fixed on the 0-degree optical filter support only by contacting the 0-degree optical filter support by a small amount, so that the passing rate of input light is increased.
Furthermore, the optical filter device also comprises a 45-degree optical filter support arranged between the base and the 0-degree optical filter support, two ends of the 45-degree optical filter support are respectively fixed with the inner wall of the base and the end face of the 0-degree optical filter support, and two ends of the 45-degree optical filter are respectively bonded with the bottom of the 45-degree optical filter support and the bottom in the base.
Further, 45 degrees light filter support is the cuboid, just the one corner of cuboid is cut off, the one corner that the cuboid was cut off with the one end of 45 degrees light filter is perpendicular. The contact area between the 45-degree optical filter and the 45-degree optical filter support is increased, so that the using amount of glue can be increased, the stability between the 45-degree optical filter and the 45-degree optical filter support is further improved, and the 45-degree optical filter is not easy to fall off.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model provides a pair of optical device with narrow passband can accomplish positive 2.5nm or burden 4.5nm with the optical passband through this optical device, makes the light of a plurality of wavelengths can not mutual interference behind this optical device, guarantees that the communication is normal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
reference numerals: 1. a base; 2. a 0 degree filter; 3. a 45-degree optical filter; 4. a light receiving and transmitting hole; 5. a light transmitting hole is emitted; 6. a transmitting and receiving light through hole; 7. a 0 degree filter support; 8. a 45 degree filter support; 9. an optical isolator.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
As shown in figure 1 of the drawings, in which,
the utility model provides an optical device with narrow passband, includes base 1, and the top of base 1 inside is provided with receives logical unthreaded hole 4, receives to lead to the unthreaded hole 4 under be provided with 0 degrees light filter support 7 that is the character cut in bas-relief, and the through-hole has been seted up at the middle part of the bottom surface in 0 degrees light filter support 7, and the size is 1.6mm 0.3 mm's 0 degree light filter 2's bottom bond in 0 degree light filter support 7's interior bottom surface. The bottom surface of the 0-degree optical filter 2 is in small contact with the 0-degree optical filter support 7, so that the 0-degree optical filter 2 can be firmly fixed on the 0-degree optical filter support 7, the contact area between the 0-degree optical filter 2 and the 0-degree optical filter support 7 is reduced, and the light passing rate is increased.
A transmitting light through hole 5 and a receiving light through hole 6 are symmetrically arranged on the left and right sides in the base 1, a light generator with a TEC and an optical isolator 9 are sequentially arranged in the transmitting light through hole, and an optical fiber adapter is arranged in the receiving light through hole; the 45-degree optical filter 3 is positioned between the emission light-transmitting hole 5 and the receiving and transmitting light-transmitting hole 6 and forms an angle of 45 degrees with the 0-degree optical filter 2; a rectangular 45-degree filter support 8 is further arranged between the inner wall of the base 1 and the 0-degree filter support 7, and the left end and the right end of the 45-degree filter support 8 are respectively fixedly arranged on the inner wall of the base 1 and the end face of the 0-degree filter support 7. One corner of the 45 degree filter holder 8 is truncated. Two ends of the 45-degree optical filter 3 with the size of 1.4mm x 0.6mm are respectively bonded with the bottom in the base 1 and the cut-off corner of the 45-degree optical filter support 8, and the cut-off corner of the 45-degree optical filter support 8 is perpendicular to the 45-degree optical filter 3. Cut 45 degrees filter support 8's one corner, increased 45 degrees filter 3 and 45 degrees contact area between the filter support 8 to can increase the use amount of glue, and then increased 45 degrees filter 3 and 45 degrees steadiness between the filter support 8, make 45 degrees filter 3 be difficult for droing.
The optical filter is also called interference filter, is used for selecting optical devices of required radiation wave bands, mainly utilizes the interference principle of light to obtain the transmission action of spectrum, and the optical filter deposits films with different refractive indexes on an optical substrate by a vacuum coating method so as to achieve different optical effects. When a mixture of light of multiple wavelengths passes through the optical filter, interference effects occur due to different refractive indexes, resulting in a very high transmittance of light of a specific wavelength while light of other wavelengths is reflected and absorbed.
As is well known, the magnitude of the refractive index changes with the change of the thickness of the film, and the thinner the film, the smaller the refractive index; the thicker the film, the greater the refractive index. After the light beams are refracted by the optical filter, the refracted light beams are close to the center of the normal, the larger the refractive index is, the closer the refracted light beams are to the center of the normal, and therefore the passband of the central wavelength is also smaller. However, since the space inside the base 1 is small, the film thickness is too thick, which in turn will affect the installation of the filter.
Therefore, in the present embodiment, through multiple experiments and verifications, the conventional 45-degree optical filter 3 with a thickness of 0.2mm or 0.3mm is eliminated, and the 45-degree optical filter 3 with a size of 1.4mm by 0.6mm and the 0-degree optical filter 2 with a size of 1.6mm by 0.3mm are selected, so that the passband of the central wavelength of the light passing through the optoelectronic device with a narrow passband can reach plus 2.5nm or minus 4.5 nm. For example, the receiving wavelength is 1470nm, and the receiving end can receive the light with the transmitting wavelength of 1475.5nm-1472.5 nm.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. An optical device with a narrow passband comprises a base (1) and a wavelength division multiplexer arranged inside the base (1), wherein the wavelength division multiplexer comprises a 0-degree optical filter (2) and a 45-degree optical filter (3), a receiving light transmitting hole (4) is arranged above the inside of the base (1), and the 0-degree optical filter (2) is opposite to the receiving light transmitting hole (4); an emission light through hole (5) and a receiving and transmitting light through hole (6) are symmetrically arranged on the left and right sides in the base (1), a light generator with a TEC and an optical isolator (9) are sequentially installed in the emission light through hole (5) from left to right, and an optical fiber adapter is arranged in the receiving and transmitting light through hole (6); the 45-degree optical filter (3) is positioned between the emission light-transmitting hole (5) and the receiving and transmitting light-transmitting hole (6) and is arranged at an angle of 45 degrees with the 0-degree optical filter (2); the length of the 45-degree optical filter (3) is 1.4mm, the width of the 45-degree optical filter is 1.4mm, the thickness of the 45-degree optical filter is 0.6mm, and the length of the 0-degree optical filter (2) is 1.6mm, the width of the 0-degree optical filter is 1.6mm, and the thickness of the 0-degree optical filter is 0.3 mm.
2. An optical device with a narrow passband according to claim 1, wherein a 0 degree filter holder (7) is disposed below the light receiving and passing hole (4), both ends of the 0 degree filter holder (7) are fixed to the inner wall of the base (1), and the 0 degree filter (2) is bonded to the 0 degree filter holder (7).
3. The optical device with a narrow passband according to claim 2, wherein the 0 degree filter holder (7) is in a shape of a Chinese character 'ao', and a through hole is opened in the middle of the inner bottom surface of the 0 degree filter holder (7), and the 0 degree filter (2) is adhered to the inner bottom surface of the 0 degree filter holder (7).
4. The optical device according to any one of claims 2 or 3, further comprising a 45-degree filter holder (8) disposed between the base (1) and the 0-degree filter holder (2), wherein two ends of the 45-degree filter holder (8) are respectively fixed to an inner wall of the base (1) and an end face of the 0-degree filter holder (7), and two ends of the 45-degree filter (3) are respectively bonded to a bottom of the 45-degree filter holder (8) and an inner bottom of the base (1).
5. An optical device with a narrow passband according to claim 4, characterized in that the 45 degree filter holder (8) is a cuboid and one corner of the cuboid is truncated, the truncated corner of the cuboid being perpendicular to one end of the 45 degree filter (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425814.0U CN210954426U (en) | 2019-12-27 | 2019-12-27 | Optical device with narrow pass band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425814.0U CN210954426U (en) | 2019-12-27 | 2019-12-27 | Optical device with narrow pass band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210954426U true CN210954426U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922425814.0U Expired - Fee Related CN210954426U (en) | 2019-12-27 | 2019-12-27 | Optical device with narrow pass band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210954426U (en) |
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2019
- 2019-12-27 CN CN201922425814.0U patent/CN210954426U/en not_active Expired - Fee Related
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Granted publication date: 20200707 |
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