CN100386655C - Three-way optical filter - Google Patents
Three-way optical filter Download PDFInfo
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- CN100386655C CN100386655C CNB2005101168142A CN200510116814A CN100386655C CN 100386655 C CN100386655 C CN 100386655C CN B2005101168142 A CNB2005101168142 A CN B2005101168142A CN 200510116814 A CN200510116814 A CN 200510116814A CN 100386655 C CN100386655 C CN 100386655C
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Abstract
A filter with three channels consists of base plate, master film formed on base plate and set with transitivity of the first wavelength scope as 1282-1582nm and with reflectivity of wavelength being greater than 1600nm, the first matching film set between master film and base plate and set with average transmission attenuation valve being less than 1dB in the second wavelength scope of 1300-1550nm, the second matching film superposed on master film and set with average transmission attenuation value being less than 0.5dB in the third and the fourth wavelength scope of 1290-1330nm and 1530-1570nm.
Description
Technical field
The present invention relates to a kind of optical filter (filter), be meant a kind of triple channel (channel) optical filter especially.
Background technology
Popularize day by day and under the high-transmission capacity grows up fast at world-wide web, transmission modes such as optical fiber (optical fiber) communication architecture have begun wavelength multiplex (MUX) communication system (the WavelengthDivision Multiplexing that the entry time multiplex (MUX) combines with the wavelength multiplex (MUX); WDM) epoch, therefore, the WDM that utilizes the optical-fibre communications framework to be constituted has become indispensable indispensable instrument of digital Age.
The optical filter that common WDM uses provides the binary channels optical filter of the frequency division effect of two wave bands mostly, for example, make the wavelength of 1310nm produce the wavelength generation reflection (reflection) that penetrates (transmission) and make 1550nm, or make the wavelength of 1550nm produce the wavelength generation reflection that penetrates and make 1310nm.Because the binary channels optical filter can only once provide the frequency division effect of two kinds of signals, therefore, increase the geometry designs restriction of WDM on module virtually.
In addition,, also once can reach the optical filter of the frequency division effect of three kinds of signals, for example, the wavelength generation of 1310nm and 1550nm be penetrated, and make the wavelength of 1625nm produce reflection for reducing the geometry designs restriction of WDM on module.Yet, this kind the wavelength tool penetrability of 1310nm and 1550nm is provided and make the wavelength of 1625nm be reflexive three-way optical filter (industry common name just, the 13P15P16R three-way optical filter), then be to know this technical field person's design and different according to heat.
From the above mentioned, how increasing the restrictive condition of the frequency division effect of optical filter with the geometry designs of reduction WDM on module, and design the three-way optical filter of the use standard that meets 13P15P16R, is the common research topic of current design optical filter association area.
Summary of the invention
The object of the present invention is to provide a kind of three-way optical filter, and be a kind of restrictive condition that increases the frequency division effect of optical filter with the geometry designs of reduction WDM on module, and meet the three-way optical filter of the use standard of 13P15P16R.
Three-way optical filter of the present invention comprises: a substrate, is formed at main film, on this substrate and is folded in the coupling of first between this substrate and this main film film, and second a coupling film that is stacked and placed on this main film.
This main film along one perpendicular to this substrate and certainly this substrate stacking direction outwardly be to be one (6LH)
MLayer structure, wherein, M is a positive integer, and M 〉=25, H is that a thickness is λ
0/ 4 high index of refraction (refractive index) rete, L are that a thickness is λ
0/ 4 low-index film, λ
0Be one between the wavelength between the 1410nm to 1450nm.Be somebody's turn to do (6LH)
MLayer structure cause this main film that one first wavelength coverage between 1282nm to 1582nm is a penetrability, and the wavelength greater than 1600nm is a reflectivity.
This first coupling film is the layer structure that is a 8H6LH2L5H along this stacking direction, and (averaging transmission loss is abbreviated as TL between the average penetration pad value of second wavelength coverage of 1300nm to 1550nm in one
Avg) be to be not more than 1dB.
This second the coupling film cause this main film be folded in this first and second the coupling film between, this second coupling film is the layer structure that is a 2LHLH2L4H3LH2L2H4L along this stacking direction, and is respectively to be not more than 0.5 dB in one between the wavelength range of 1290nm to 1330nm and an average penetration pad value between the 4th wavelength coverage of 1530nm to 1570nm.
Effect of the present invention is, increases the restrictive condition of the frequency division effect of optical filter with the geometry designs of reduction WDM on module, and the three-way optical filter of the use standard of a kind of 13P15P16R of meeting is provided.
Description of drawings
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is a front elevational schematic, and a preferred embodiment of three-way optical filter of the present invention is described.
Fig. 2 is an average penetration die-away curve figure, and the average penetration die-away curve of a main film of this preferred embodiment is described.
Fig. 3 is an average penetration die-away curve figure, and the average penetration die-away curve of one first coupling film of this preferred embodiment is described.
Fig. 4 is Fig. 2 and the average penetration die-away curve figure of Fig. 3 after stack.
Fig. 5 is an average penetration die-away curve figure, and the average penetration die-away curve of one second coupling film of this preferred embodiment is described.
Fig. 6 is Fig. 4 and the average penetration die-away curve figure of Fig. 5 after stack.
Embodiment
Consult Fig. 1, a preferred embodiment of three-way optical filter of the present invention comprises: a substrate 2, is formed at main film 3, on this substrate 2 and is folded in the coupling of first between this substrate 2 and this main film 3 film 4, and second a coupling film 5 that is stacked and placed on this main film 3.
This main film 3 along one perpendicular to this substrate 2 and certainly this substrate 2 stacking direction Y outwardly be one (6LH)
MLayer structure, wherein, M is a positive integer, and M 〉=25.Be somebody's turn to do (6LH)
MLayer structure cause 3 pairs one first wavelength coverages of this main film to be a penetrability between 1282nm to 1582nm, and the wavelength greater than 1600nm is a reflectivity.In this preferred embodiment, M equals 25, just, and (6LH) of this main film 3
MLayer structure be (6LH)
25
This first coupling film 4 is to be not more than 1dB in an average penetration pad value between second wavelength coverage of 1300nm to 1550nm.In this preferred embodiment, this first coupling film 4 is between between the 1dB to 0.3dB in the average penetration pad value of this second wavelength coverage, and this first coupling film 4 is the layer structure that is a 8H6LH2L5H along this stacking direction Y.
This second coupling film 5 causes this main film 3 to be folded between this first and second coupling film 4,5, and this second coupling film 5 is respectively to be not more than 0.5dB in one between the wavelength range of 1290nm to 1330nm and an average penetration pad value between the 4th wavelength coverage of 1530nm to 1570nm.In this preferred embodiment, this second coupling film 5 is respectively between between the 0.5dB to 0.2dB in the average penetration pad value of the 3rd and the 4th wavelength coverage.And this second coupling film 5 is the layer structure that is a 2LHLH2L4H3LH2L2H4L along this stacking direction Y.
In the layer structure of described film 3,4,5, H is that a thickness is λ
0/ 4 high refractive index layer, L are that a thickness is λ
0/ 4 low-index film, λ
0Be one between the wavelength between the 1410nm to 1450nm.Be applicable to the λ of three-way optical filter of the present invention
0Be one between the wavelength between the 1410nm to 1450nm; More preferably, this λ
0Wavelength be between between the 1410nm to 1420nm, and the refractive index of high and low refractive index rete be respectively between between 2.1 to 2.7 and 1.38 to 1.44 between.In this preferred embodiment, this λ
0Wavelength be 1417nm, and this high and low refractive index rete is respectively tantalum oxide (tantalum oxide) and monox (silicon oxide).
By preceding described, the layer structure of the described film 4,3,5 of this preferred embodiment along this stacked direction Y is in regular turn: substrate/8H6LH2L5H/ (6LH)
25/ 2LHLH2L4H3LH2L2H4L/ air.
Consult Fig. 2, by this main film 3 at (6LH)
25Layer structure under the average penetration die-away curve show, though this main film 3 to this first wavelength coverage (just, 1282nm～1582nm) presents penetrability, and M equals 25 causes the wavelength of 3 couples of 1625nm of this main film to present reflectivity, yet this main film 3 is to be unsettled tendency in the average penetration die-away curve of this first wavelength coverage.
In addition, consult Fig. 3, shown by the average penetration die-away curve of this first coupling film 4 under the layer structure of 8H6LH2L5H, (just, the average penetration pad value of 1300nm～1550nm) is less than 1dB to this first coupling film 4 in this second wavelength coverage.
Consult Fig. 4, show via the average penetration die-away curve after Fig. 2 and Fig. 3 stack, this first coupling film 4 provides the preliminary compensation of average penetration decay to this main film 3 in this first wavelength coverage, tend to be steady to cause this main film 3 and the average penetration die-away curve of this first coupling film 4 after stack.Yet, show that by Fig. 4 (just, the average penetration pad value in 1290nm～1330nm and the 1530nm～1570nm) still can't meet the transmission standard of 1310nm and two kinds of signals of 1550nm in this third and fourth wavelength coverage.
After Fig. 4 explanation, cooperate and consult Fig. 5, show by the average penetration die-away curve of this second coupling film 5 under the layer structure of 2LHLH2L4H3LH2L2H4L, this second coupling film 5 in the average penetration pad value of this third and fourth wavelength coverage all less than 0.5dB.
Therefore, consult Fig. 6, show via the average penetration die-away curve after Fig. 4 and Fig. 5 stack, this second coupling film 5 provides the fine compensation of average penetration decay respectively to this main film 3 and this first coupling film 4 in this third and fourth wavelength coverage, can meet the transmission standard of 1310nm and two kinds of signals of 1550nm to cause this main film 3, this first coupling film 4 and the average penetration die-away curve of this second coupling film 5 after stack.
In addition, the front is also mentioned, equals 25 by M and causes the wavelength of 3 couples of 1625nm of this main film to present reflectivity, and therefore, the average penetration die-away curve of three-way optical filter of the present invention is the transmission standard that can meet three kinds of signals such as 13P15P16R.
Conclude above-mentioned, three-way optical filter of the present invention can provide the frequency division effect (13P15P16R) of three kinds of signals such as 1310nm, 1550nm and 1625nm simultaneously, therefore, not only be suitable for the WDM module, also reduce the restrictive condition of the geometry designs of WDM on module, and have the characteristics such as use standard that meet 13P15P16R, so can reach purpose of the present invention really.
Claims (6)
1. three-way optical filter is characterized in that it comprises:
One substrate;
One is formed at the main film on this substrate, along one perpendicular to this substrate and certainly this substrate stacking direction outwardly be to be one (6LH)
MLayer structure, wherein, M is a positive integer, and M 〉=25, H is that a thickness is λ
0/ 4 high refractive index layer, L are that a thickness is λ
0/ 4 low-index film, λ
0Be one between the wavelength between the 1410nm to 1450nm, should (6LH)
MLayer structure cause this main film that one first wavelength coverage between 1282nm to 1582nm is a penetrability, and the wavelength greater than 1600nm is a reflectivity;
One is folded in first between this substrate and this main film coupling film, and this first coupling film is the layer structure that is a 8H6LH2L5H along this stacking direction, and is to be not more than 1dB in an average penetration pad value between second wavelength coverage of 1300nm to 1550nm; And
One is stacked and placed on the second coupling film of this main film, cause this main film be folded in this first and second the coupling film between, this second coupling film is the layer structure that is a 2LHLH2L4H3LH2L2H4L along this stacking direction, and is respectively to be not more than 0.5dB in one between the wavelength range of 1290nm to 1330nm and an average penetration pad value between the 4th wavelength coverage of 1530nm to 1570nm.
2. three-way optical filter as claimed in claim 1 is characterized in that: this λ
0Wavelength be between between the 1410nm to 1420nm.
3. three-way optical filter as claimed in claim 2 is characterized in that: this λ
0Wavelength be 1417nm.
4. three-way optical filter as claimed in claim 3, it is characterized in that: this first coupling film is between between the 1dB to 0.3dB in the average penetration pad value of this second wavelength coverage, and this second coupling film is respectively between between the 0.5dB to 0.2dB in the average penetration pad value of the 3rd and the 4th wavelength coverage.
5. three-way optical filter as claimed in claim 4, it is characterized in that: M equals 25.
6. three-way optical filter as claimed in claim 5 is characterized in that: this high refractive index layer is a tantalum oxide, and this low-index film is a monox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101168142A CN100386655C (en) | 2005-10-27 | 2005-10-27 | Three-way optical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101168142A CN100386655C (en) | 2005-10-27 | 2005-10-27 | Three-way optical filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955764A CN1955764A (en) | 2007-05-02 |
| CN100386655C true CN100386655C (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101168142A Expired - Fee Related CN100386655C (en) | 2005-10-27 | 2005-10-27 | Three-way optical filter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885108A (en) * | 2014-04-10 | 2014-06-25 | 江苏北方湖光光电有限公司 | Attenuation band-pass filter and manufacturing method of attenuation band-pass filter |
| CN109164527B (en) * | 2018-11-05 | 2021-07-30 | 无锡泓瑞航天科技有限公司 | Five-channel multicolor optical filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179468A (en) * | 1991-11-05 | 1993-01-12 | Gte Products Corporation | Interleaving of similar thin-film stacks for producing optical interference coatings |
| JP2001100024A (en) * | 1999-09-27 | 2001-04-13 | Alps Electric Co Ltd | Multilayered optical filter |
| CN1432827A (en) * | 2002-01-08 | 2003-07-30 | 鸿富锦精密工业（深圳）有限公司 | Film filter |
| US6611378B1 (en) * | 2001-12-20 | 2003-08-26 | Semrock, Inc. | Thin-film interference filter with quarter-wavelength unit sub-layers arranged in a generalized pattern |
| JP2005062291A (en) * | 2003-08-08 | 2005-03-10 | Hitachi Maxell Ltd | Optical band pass filter |
| CN1601949A (en) * | 2003-09-23 | 2005-03-30 | 中国科学院光电技术研究所 | Dielectric-Layer type dense wavelength division multi plexer filter |
-
2005
- 2005-10-27 CN CNB2005101168142A patent/CN100386655C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179468A (en) * | 1991-11-05 | 1993-01-12 | Gte Products Corporation | Interleaving of similar thin-film stacks for producing optical interference coatings |
| JP2001100024A (en) * | 1999-09-27 | 2001-04-13 | Alps Electric Co Ltd | Multilayered optical filter |
| US6611378B1 (en) * | 2001-12-20 | 2003-08-26 | Semrock, Inc. | Thin-film interference filter with quarter-wavelength unit sub-layers arranged in a generalized pattern |
| CN1432827A (en) * | 2002-01-08 | 2003-07-30 | 鸿富锦精密工业（深圳）有限公司 | Film filter |
| JP2005062291A (en) * | 2003-08-08 | 2005-03-10 | Hitachi Maxell Ltd | Optical band pass filter |
| CN1601949A (en) * | 2003-09-23 | 2005-03-30 | 中国科学院光电技术研究所 | Dielectric-Layer type dense wavelength division multi plexer filter |
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| Publication number | Publication date |
|---|---|
| CN1955764A (en) | 2007-05-02 |
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Owner name: XINTHAI OPTICAL (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: ASIA OPTICAL CO., LTD. Effective date: 20090619 |
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Effective date of registration: 20090619 Address after: First, second, third industrial parks, Li Songlang Industrial Zone, Gongming Town, Shenzhen, Baoan District Patentee after: Xintai optics (Shenzhen) Co., Ltd. Address before: No. 22, No. three, south two road, Taichung processing and export area, Taichung County, Taichung County, Taiwan Patentee before: Asia Optics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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