CN203396987U - Lens group for monomode laser coupling - Google Patents
Lens group for monomode laser coupling Download PDFInfo
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- CN203396987U CN203396987U CN201320443014.1U CN201320443014U CN203396987U CN 203396987 U CN203396987 U CN 203396987U CN 201320443014 U CN201320443014 U CN 201320443014U CN 203396987 U CN203396987 U CN 203396987U
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- lens
- collar
- laser
- coupling
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Abstract
The utility model relates to a lens group for monomode laser coupling. The lens group comprises a laser, a first lens and a second lens. The first lens and the second lens are coaxial lenses. The laser is placed within the focal length of the first lens to make a virtual image formed by the first lens located at the focal point of the second lens, so that light emitted from the object point passes through the first lens and the second lens to form parallel light. In the structure, the first lens is in passive alignment to diminish the divergence angle of the light beam and largen the beam waist light spot, so collimation can be easily realized. Moreover, the allowed coupling tolerance is large, so the advantage of high coupling efficiency can be realized even in low alignment precision requirements, so the feasibility of coupled packaging can be greatly improved.
Description
Technical field
The utility model relates to a kind of lens combination for single-mode laser coupling, belongs to optical communication technique field.
Background technology
Flourish along with optical communication industry, optical lens, as requisite optical component in optic communication device, has obtained the application of very big degree.Lens are realized the function to beam collimation or focusing in communication device.The existing method by single-mode laser coupling is directly to utilize single lens to carry out active coupling, but because the angle of divergence of single-mode laser is large, hot spot with a tight waist is little, require signal-lens aligning and fixed precision to be conventionally less than 0.2um, its coupling and fixed precision are little, and as shown in Figure 1, packaging technology requires high, actual production yield is low, and production efficiency is poor.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of lens combination for single-mode laser coupling is provided.
The purpose of this utility model is achieved through the following technical solutions:
Lens combination for single-mode laser coupling, feature is: comprise laser instrument, first lens and the second lens, described first lens is coaxial lens with the second lens, and one times of focal length that described laser instrument is placed on described first lens is positioned in the focus of the second lens its virtual image being become with interior.
Further, the above-mentioned lens combination for single-mode laser coupling, also comprises: the first lens collar, the second lens collar, hollow sliding accessory and pedestal; Described first lens and the second lens are placed in respectively in the first lens collar and the second lens collar, the described second lens collar is connected with the first lens collar by hollow sliding accessory, the described first lens collar is fixed on pedestal, has the through hole relative with first lens on described pedestal.
Further, the above-mentioned lens combination for single-mode laser coupling, the described first lens collar is fixed on pedestal by laser bonding mode.
Further, the above-mentioned lens combination for single-mode laser coupling, described hollow sliding accessory is connected with the second lens collar with the first lens collar by laser bonding mode.
Again further, the above-mentioned lens combination for single-mode laser coupling, between described first lens and the first lens collar and between the second lens and the second lens collar by metallic glass one-shot forming.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
The utility model provides a kind of lens combination for single-mode laser coupling, and by the design lens collar, hollow sliding accessory and pedestal etc., first lens packaging passive alignment, diminishes the angle of divergence of light beam, and hot spot with a tight waist becomes large, is easy to collimation; In addition, the coupling tolerance of its permission is large, under lower alignment precision requires, also can reach high coupling efficiency, and coupling package feasibility greatly improves.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:
Fig. 1: background technology single-mode laser luminous Shu Liyong simple lens be coupled into the coupling efficiency of single-mode fiber and position skew (fixed precision) graph of a relation;
Fig. 2: single-mode laser luminous Shu Liyong the utility model lens combination be coupled into the coupling efficiency of single-mode fiber and position skew (fixed precision) graph of a relation;
Fig. 3: the decomposition texture schematic diagram of the utility model lens combination;
Fig. 4: the light path schematic diagram of the utility model lens combination.
Embodiment
As shown in Figure 3, the lens combination for single-mode laser coupling, comprises laser instrument 1, first lens 2, the second lens 3, the first lens collar 4, the second lens collar 5, hollow sliding accessory 6 and pedestal 7; First lens 2 is coaxial lens with the second lens 3, the second lens 3 are placed in the second lens collar 5, first lens 2 is placed in the first lens collar 4, the second lens collar 5 is connected with the first lens collar 4 by hollow sliding accessory 6, the first lens collar 4 is fixed on pedestal, has the through hole relative with first lens 2 on pedestal 7.
Between first lens 2 and the first lens collar 4 and between the second lens 3 and the second lens collar 5 by metallic glass one-shot forming, hollow sliding accessory 6 is connected with the second lens collar 5 with the first lens collar 4 by laser bonding mode, and the first lens collar 4 is fixed on pedestal 7 by laser bonding mode.
As shown in Figure 4, laser instrument 1 is placed in one times of focal length of first lens 2, and its virtual image becoming is positioned in the focus of the second lens 3, so makes the light that laser instrument 1 sends form directional light after first lens 2 and the second lens 3.During coupling package, by the focusing that is coupled of the first lens collar with first lens 24 and pedestal 7, by the first lens collar 4, in (X, the Y-axis) up and down on pedestal 7 surfaces, slide and find coupling efficiency Gao position, by laser bonding, the first lens collar 4 is welded on pedestal 7.The hollow sliding accessory 6 that size matches and the distance of the Z axis between the second lens collar 5 can regulate and control arbitrarily, by the fixture of laser-beam welding machine, and by hollow sliding accessory 6 on the first lens collar 4 surfaces up and down before and after (X, Y, Z axis) slide and find behind coupling efficiency Gao position, with the sliding accessory 6 of laser bonding mode welded hollow and the second lens collar 5, with the fixing distance of Z axis, then again by hollow sliding accessory 6 on the first lens collar 4 surfaces (X up and down, Y-axis) slide, find after optimistic coupling efficiency, with the sliding accessory 6 of laser bonding mode welded hollow and the first lens collar 4.
The utility model provides a kind of lens combination device for single-mode laser coupling, and by the design lens collar, hollow sliding accessory and pedestal etc., first lens packaging passive alignment, diminishes the angle of divergence of light beam, and hot spot with a tight waist becomes large, is easy to collimation; In addition, the coupling tolerance of its permission is large, under lower alignment precision requires, also can reach high coupling efficiency, and as shown in Figure 2, coupling package feasibility greatly improves.
It is to be understood that: the above is only preferred implementation of the present utility model; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. for the lens combination of single-mode laser coupling, it is characterized in that: comprise laser instrument, first lens and the second lens, described first lens is coaxial lens with the second lens; One times of focal length that described laser instrument is placed on described first lens is positioned in the focus of the second lens its virtual image being become with interior.
2. the lens combination for single-mode laser coupling according to claim 1, also comprises: the first lens collar, the second lens collar, hollow sliding accessory and pedestal; Described first lens and the second lens are placed in respectively in the first lens collar and the second lens collar; Between the described first lens collar and the second lens collar, by hollow sliding accessory, connect; The described first lens collar is fixed on pedestal; On described pedestal, have the through hole relative with first lens.
3. the lens combination for single-mode laser coupling according to claim 2, is characterized in that: the described first lens collar is fixed on pedestal by laser bonding mode.
4. the lens combination for single-mode laser coupling according to claim 2, is characterized in that: described hollow sliding accessory is connected with the second lens collar with the first lens collar by laser bonding mode.
5. the lens combination for single-mode laser coupling according to claim 2, is characterized in that: between described first lens and the first lens collar and between the second lens and the second lens collar by metallic glass one-shot forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320443014.1U CN203396987U (en) | 2013-07-24 | 2013-07-24 | Lens group for monomode laser coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320443014.1U CN203396987U (en) | 2013-07-24 | 2013-07-24 | Lens group for monomode laser coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396987U true CN203396987U (en) | 2014-01-15 |
Family
ID=49908509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320443014.1U Withdrawn - After Issue CN203396987U (en) | 2013-07-24 | 2013-07-24 | Lens group for monomode laser coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203396987U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364897A (en) * | 2013-07-24 | 2013-10-23 | 苏州旭创科技有限公司 | Lens system for coupling single mode lasers |
-
2013
- 2013-07-24 CN CN201320443014.1U patent/CN203396987U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364897A (en) * | 2013-07-24 | 2013-10-23 | 苏州旭创科技有限公司 | Lens system for coupling single mode lasers |
| CN103364897B (en) * | 2013-07-24 | 2015-08-12 | 苏州旭创科技有限公司 | For the lens combination of single-mode laser coupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140115 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |