CN102819072A - Optical fiber communication device - Google Patents
Optical fiber communication device Download PDFInfo
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- CN102819072A CN102819072A CN 201110155534 CN201110155534A CN102819072A CN 102819072 A CN102819072 A CN 102819072A CN 201110155534 CN201110155534 CN 201110155534 CN 201110155534 A CN201110155534 A CN 201110155534A CN 102819072 A CN102819072 A CN 102819072A
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- reflection
- spherical lens
- tapered plane
- guiding device
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Abstract
An optical fiber communication device comprises a laser light source, a light guide device and a beam of optical fibers. The light guide device comprises a first aspherical lens and a reflection inclined plane, wherein the optical axis direction of the first aspherical lens is identical to the light emitting direction of the laser light source and the first aspherical lens is used for gathering light emitted by the laser light source. The inclining direction of the reflection inclined plane is a first direction, and the included angle theta formed by the first direction and the optical axis direction enables the light is totally reflected in the light guide device. The material refractive index range of the light guide device is 1.415-1.5 or 1.65-1.7, and 37.32 degrees <=theta<=45 degrees or 45 degrees <=theta<=56.3 degrees. The optical fibers are placed in a second direction, the second direction and the optical axis direction are symmetrical relative to the normal of the reflection inclined plane, and the second direction is used for receiving light totally reflected by the reflection inclined plane.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of optical-fibre communications device that comprises guiding device.
Background technology
In the prior art, it is signal source that the optical communication transmission technology often adopts light emitting diode, and the light signal that it sends is directed in the optical fiber transmits.Yet,, can increase mechanism size if optical fiber is provided with along the light transmission direction; If bending optical fiber has then increased the bending loss of system, influence Optical Fiber Transmission efficient.If reflection or refraction take place in light guide structure light, light loss is higher.
Summary of the invention
In view of this, provide the low optical-fibre communications device of a kind of compact conformation and loss real for necessary.
A kind of optical-fibre communications device, it comprises a LASER Light Source, a guiding device and a branch of optical fiber.This guiding device comprises one first non-spherical lens and a reflection tapered plane; The optical axis direction of this first non-spherical lens is consistent with the light direction of this LASER Light Source; Be used to assemble the light that this LASER Light Source sends; The vergence direction of this reflection tapered plane is a first direction, and there is angle theta in this first direction with this optical axis direction, and this angle theta makes this light in this guiding device inner total reflection; The material ranges of indices of refraction of this guiding device is 1.415 ~ 1.5 or 1.65 ~ 1.7,37.32 ° ≦ θ＜45 ° or 45 ° of＜θ ≦ 56.3 °.This optical fiber is placed along a second direction, and this second direction and this optical axis direction are used to receive the light by this reflection tapered plane total reflection about the normal symmetry of this reflection tapered plane.
With respect to prior art, optical-fibre communications device provided by the invention can make light that LASER Light Source sends take place on the reflection tapered plane that total reflection is laggard goes into optical fiber, thereby reduces light loss, and makes whole this optical-fibre communications apparatus structure compact.
Description of drawings
Fig. 1 is the optical-fibre communications schematic representation of apparatus that the embodiment of the invention provides.
Fig. 2 is illustrated under the fixing situation of fiber end face area, the spacing of the maximum allowable offset angle of guiding device and this end face-reflection tapered plane, the relation between the two.
The main element symbol description
| The optical-fibre communications device | 100 |
| LASER Light Source | 20 |
| Guiding device | 30 |
| Optical fiber | 40 |
| The reflection tapered plane | 32 |
| First non-spherical lens | 35 |
| Second non-spherical lens | 36 |
| Fibre core | 41 |
| Clad | 42 |
| End face | 400 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
Below will combine accompanying drawing that the present invention is done further explain.
See also Fig. 1, the present invention provides a kind of optical-fibre communications device 100, and it comprises 20, one guiding devices 30 of a LASER Light Source, and a branch of optical fiber 40.
This LASER Light Source 20 is towards these guiding device 30 bright dippings.
This guiding device 30 comprises one first non-spherical lens 35 and a reflection tapered plane 32.The optical axis direction I of this first non-spherical lens 35 is consistent with the direction of the central light beam of this LASER Light Source 20, is used to assemble the light that this LASER Light Source 20 sends.This first non-spherical lens 35 is a plano-convex lens.
The vergence direction of this reflection tapered plane 32 is a first direction, has angle theta between the optical axis direction of this first direction and this first non-spherical lens 35, thereby makes laser beam in these guiding device 30 inner total reflections.θ is an acute angle, preferably, and 37.32 ° ≦ θ＜45 °.
The material of this guiding device 30 is that (Polyetherimide, in the time of PEI), refractive index generally drops on 1.65 ~ 1.7 to polyetherimide.Calculate through test, when refractive index is 1.65, realize that the θ angle of total reflection is 37.34 °; When refractive index is 1.7, realize that the θ angle of total reflection is 37.32 °.
When the material of this guiding device 30 is that (Silicon, in the time of Si), refractive index generally drops on 1.415 ~ 1.5 to silicon.Calculate through test, when refractive index was 1.415, the θ angle of realizing total reflection was for being slightly less than 45 °; When refractive index is 1.5, realize that the θ angle of total reflection is 41.85 °.
This optical fiber 40 is placed along a second direction, and this second direction and this optical axis direction are used to receive the light by these reflection tapered plane 32 total reflections about the normal symmetry of this reflection tapered plane.This optical fiber 40 comprises that a fibre core 41 and is coated on this fibre core 41 outer field clads 42.This optical fiber 40 also has the end face 400 of reception, and this end face 400 is D with the distance of this reflection tapered plane 32 on this second direction.
See also Fig. 2, under the situation that the area of this end face 400 is fixed, the permissible variation angle and the distance B of this guiding device 30 are inversely proportional to.D is more little, and the permissible variation angle is big more; D is big more, and the permissible variation angle is more little.For example, when D was the 0.1mm left and right sides, this maximum allowable offset angle was about 10 degree; When D is between 0.2mm ~ 0.3mm the time, this maximum allowable offset angle is about 4 degree, so, 0.1mm ≦ D ≦ 1mm, preferably, 0.1mm ≦ D ≦ 0.3mm.
Through calculating, under the area of selected end face 400 and the situation of distance B, these reflection tapered plane 32 maximum allowable offset angles are 11.3 degree; Therefore; Be as the criterion with critical angle 45, add this maximum allowable offset amount, the upper limit that draws the θ angle of realizing this total reflection can be 56.3 °; That is, the θ angular region also can be 45 ° of＜θ ≦ 56.3 °; Deduct this maximum allowable offset amount; Draw down and be limited to 33.7 degree, right, 33.7 degree are 37.32 ° of the cirtical angles of total reflection that allowed to the maximum at 1.7 o'clock less than refractive index; Therefore the scope at the θ angle of this guiding device 30 is 37.32 ° ≦ θ ≦ 56.3 °, but does not comprise 45 °.
This guiding device 30 also comprises one second non-spherical lens 36, and this second direction of the optical axis direction of this second non-spherical lens 36 is consistent, and between this reflection tapered plane 32 and this optical fiber 40, is used to assemble this total reflection light and makes it get into this optical fiber 40.This second non-spherical lens 36 is a plano-convex lens.
In the present embodiment; This guiding device 30 is integrated formed structures; The reflection tapered plane 32 and second non-spherical lens 36 lay respectively at two non-conterminous sides of guiding device 30, and first non-spherical lens 35 is positioned at the bottom of guiding device 30 and connects reflection tapered plane 32 and two sides at second non-spherical lens, 36 places.This LASER Light Source 20 is positioned at the below of this first non-spherical lens 35.
Optical-fibre communications device 100 provided by the invention can make light that LASER Light Source 20 sends take place on reflection tapered plane 32 that total reflection is laggard goes into optical fiber 40, thereby reduces light loss, and makes whole this optical-fibre communications apparatus structure compact.
It is understandable that those skilled in the art also can do other variation in spirit of the present invention, all should be included within the present invention's scope required for protection.
Claims (8)
1. optical-fibre communications device, it comprises:
A LASER Light Source;
A guiding device; Comprise one first non-spherical lens and a reflection tapered plane; The optical axis direction of this first non-spherical lens is consistent with the light direction of this LASER Light Source, is used to assemble the light that this LASER Light Source sends, and the vergence direction of this reflection tapered plane is a first direction; There is angle theta in this first direction with this optical axis direction; This angle theta makes this light in this guiding device inner total reflection, and the material ranges of indices of refraction of this guiding device is 1.415 ~ 1.5 or 1.65 ~ 1.7,37.32 ° ≦ θ＜45 ° or 45 ° of＜θ ≦ 56.3 °; And
A branch of optical fiber is placed along a second direction, and this second direction and this optical axis direction are used to receive the light by this reflection tapered plane total reflection about the normal symmetry of this reflection tapered plane.
2. optical-fibre communications device as claimed in claim 1 is characterized in that this optical fiber has end face, and this end face and the distance of this reflection tapered plane on this second direction are D, and 0.1mm ≦ D ≦ 1mm.
3. optical-fibre communications device as claimed in claim 2 is characterized in that, 0.1mm ≦ D ≦ 0.3mm.
4. optical-fibre communications device as claimed in claim 1 is characterized in that this first non-spherical lens is positioned at the bottom of this guiding device, and this LASER Light Source is positioned at the below of this first non-spherical lens.
5. optical-fibre communications device as claimed in claim 1; It is characterized in that this guiding device also comprises one second non-spherical lens, between this reflection tapered plane and this optical fiber; The optical axis direction of this second non-spherical lens is consistent with this second direction, is used to assemble this total reflection light.
6. optical-fibre communications device as claimed in claim 5 is characterized in that, this first non-spherical lens is positioned at the bottom of this guiding device and connects this reflection tapered plane and the side at this second non-spherical lens place.
7. optical-fibre communications device as claimed in claim 6 is characterized in that, the side at this reflection tapered plane and this second non-spherical lens place is non-conterminous.
8. optical-fibre communications device as claimed in claim 1 is characterized in that, this guiding device structure that is formed in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110155534 CN102819072A (en) | 2011-06-10 | 2011-06-10 | Optical fiber communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110155534 CN102819072A (en) | 2011-06-10 | 2011-06-10 | Optical fiber communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102819072A true CN102819072A (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110155534 Pending CN102819072A (en) | 2011-06-10 | 2011-06-10 | Optical fiber communication device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048746A (en) * | 2012-12-24 | 2013-04-17 | 日月光半导体制造股份有限公司 | Optical module structure |
| CN103885140A (en) * | 2014-04-15 | 2014-06-25 | 昆山柯斯美光电有限公司 | Chip array and parallel optical fiber passively-coupled optical assembly and assembling method of chip array and parallel optical fiber passively-coupled optical assembly |
| CN103901557A (en) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Photovoltaic conversion module |
| CN103885133B (en) * | 2012-12-21 | 2017-06-16 | 赛恩倍吉科技顾问（深圳）有限公司 | Optical communication apparatus |
-
2011
- 2011-06-10 CN CN 201110155534 patent/CN102819072A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885133B (en) * | 2012-12-21 | 2017-06-16 | 赛恩倍吉科技顾问（深圳）有限公司 | Optical communication apparatus |
| CN103048746A (en) * | 2012-12-24 | 2013-04-17 | 日月光半导体制造股份有限公司 | Optical module structure |
| CN103901557A (en) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Photovoltaic conversion module |
| CN103885140A (en) * | 2014-04-15 | 2014-06-25 | 昆山柯斯美光电有限公司 | Chip array and parallel optical fiber passively-coupled optical assembly and assembling method of chip array and parallel optical fiber passively-coupled optical assembly |
| CN103885140B (en) * | 2014-04-15 | 2016-05-11 | 昆山柯斯美光电有限公司 | The optical assembly of chip array and the passive coupling of parallel optical fibre and assemble method thereof |
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Application publication date: 20121212 |