CN102411174A - Optical fiber core insert - Google Patents
Optical fiber core insert Download PDFInfo
- Publication number
- CN102411174A CN102411174A CN2011104461696A CN201110446169A CN102411174A CN 102411174 A CN102411174 A CN 102411174A CN 2011104461696 A CN2011104461696 A CN 2011104461696A CN 201110446169 A CN201110446169 A CN 201110446169A CN 102411174 A CN102411174 A CN 102411174A
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- Prior art keywords
- fiber
- face
- optical fiber
- coupling efficiency
- fiber stub
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Abstract
The invention discloses an optical fiber core insert. The end face of the optical fiber core insert is a flat end face or a PC (physical connection) end face, and an anti-reflection film is plated on the end face. The optical fiber core insert has the beneficial effects that end face reflection can be inhibited, and the coupling efficiency of a laser can be enhanced; and particularly for a single-fiber bidirectional (three-way) device, the coupling efficiency of a detector is enhanced while the coupling efficiency of the laser is enhanced, the rate of finished products is greatly improved, and the cost is lowered.
Description
Technical field
The present invention relates to a kind of fiber stub.
Background technology
In optic communication device, for reducing the influence of reflected light to laser instrument, the fiber stub of end slope 8 ° (or 6 °) is widely applied.As shown in Figure 1: in the series coupled light path of semiconductor laser 1, lens 2, single-mode fiber lock pin 3 and single-mode fiber 4; Because the existence of oblique 8 ° (or 6 °) end faces; Return the wide big minimizing of chip of laser from the fiber stub end face reflection, the chip of laser Noise Suppression is had very big contribution.
The weak point of this method is: owing to the existence of fiber stub end face oblique 8 ° (or 6 °), makes the input light field 5 and fiber mode field 6 mismatches of laser instrument, thereby influences coupling efficiency, and as shown in Figure 2.For high power laser, the loss of coupling efficiency causes the decline of yield rate and the increase of cost especially.In addition; At single fiber two (three) in device; Because the existence of fiber stub end face oblique 8 ° (or 6 °), the fiber stub light direction will with horizontal direction at an angle, detector TO8 (as shown in Figure 3) is advanced in 9 reflection back oblique incidences through 45 ° of optical filters; Influence detector coupling efficiency (responsiveness), increase the fraction defective of product.
Summary of the invention
The technical matters that the present invention will solve provides a kind of fiber stub; Can not only suppress end face reflection; And can increase the coupling efficiency of laser instrument, especially for single fiber two (three) to device, when increasing the laser instrument coupling efficiency, also can increase the detector coupling efficiency; Significantly improve the yield rate of product, reduce cost.
In order to solve the problems of the technologies described above, the invention provides a kind of fiber stub, the end face of said fiber stub is planar end surface or PC end face, is coated with anti-reflection film on the said end face.
Further, said anti-reflection film is a laser instrument emission wavelength anti-reflection film.
Further, the optical fiber in the said fiber stub is single-mode fiber.
Further, the optical fiber in the said fiber stub is multimode optical fiber.
Fiber stub of the present invention can not only suppress end face reflection, and has increased the coupling efficiency of laser instrument; Especially for single fiber two (three) to device; When increasing the laser instrument coupling efficiency, also increased the detector coupling efficiency, significantly improved the yield rate of product, reduced cost.
Description of drawings
Fig. 1 is the working state schematic representation of fiber stub in the prior art.
Fig. 2 is a synoptic diagram of importing the mode field of light field and optical fiber in the prior art.
Fig. 3 is the synoptic diagram that the fiber stub of prior art is applied to the single fiber bi-directional device.
Fig. 4 is the synoptic diagram of the mode field of input light field of the present invention and optical fiber.
Fig. 5 is the working state schematic representation of the embodiment of a kind of single-mode fiber lock pin of the present invention.
Fig. 6 is the working state schematic representation of the embodiment of a kind of multimode optical fiber lock pin of the present invention.
Fig. 7 is the synoptic diagram that a kind of single-mode fiber lock pin of the present invention is applied to the single fiber bi-directional device.
Fig. 8 is the synoptic diagram that a kind of multimode optical fiber lock pin of the present invention is applied to the single fiber bi-directional device.
Among the figure: 1. semiconductor laser, 2. lens, 3. single-mode fiber lock pin, 4. single-mode fiber, 5. input light field, 6. fiber mode field, 7. laser instrument TO, 8. detector TO, 9.45 ° of optical filters, 10. anti-reflection films.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further so that those skilled in the art can better understand the present invention and implementing, but the embodiment that lifts not conduct to qualification of the present invention.
Shown in Fig. 5 ~ 8, the end face of fiber stub of the present invention is planar end surface (end face is the plane) or PC (Physical connection) end face (the end radius-of-curvature is 20mm), is coated with anti-reflection film 10 on the said end face.Anti-reflection film 10 is a laser instrument emission wavelength anti-reflection film.
As shown in Figure 4, among the present invention, the fiber stub end face is planar end surface or PC end face, makes the input light field 5 of laser instrument and fiber mode field 6 matching degrees reach best, has guaranteed maximum coupling efficiency.Like Fig. 7 and shown in Figure 8; To device, because the fiber stub end face is put down, the fiber stub light direction in horizontal direction for single fiber two (three); Advance detector TO 8 through 45 ° of optical filters, 9 reflection back vertical incidence, improved detector coupling efficiency (responsiveness).
The anti-reflection film 10 of ferrule end-face plating laser instrument TO 7 emitted laser wavelength has reduced the reflection of being located to cause by planar end surface (or PC end face).
Optical fiber in the fiber stub can be single-mode fiber, like Fig. 5 and shown in Figure 7; Also can be multimode optical fiber (50 μ m/125 μ m or 62.5 μ m/125 μ m), like Fig. 6 and shown in Figure 8.
Fiber stub of the present invention has increased laser instrument coupling efficiency and two (three) the detector coupling efficiencies in device of single fiber in inhibitory reflex, significantly improved yield rate, has reduced cost, has practiced thrift the energy.The present invention can be used for TOSA (the Transmitting Optical Sub-Assembly of speed below 1.25Gbps (containing); Light emission component) and BOSA (Bi-Directional Optical Sub-Assembly; And can be used for speed is with isolator more than 2.5Gbps (containing) P2P BOSA the light transceiver module).
The above embodiment is the preferred embodiment that proves absolutely that the present invention lifts, and protection scope of the present invention is not limited thereto.Being equal to that the technician in present technique field is done on basis of the present invention substitutes or conversion, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (4)
1. a fiber stub is characterized in that, the end face of said fiber stub is planar end surface or PC end face, is coated with anti-reflection film on the said end face.
2. fiber stub according to claim 1 is characterized in that, said anti-reflection film is a laser instrument emission wavelength anti-reflection film.
3. fiber stub according to claim 1 and 2 is characterized in that, the optical fiber in the said fiber stub is single-mode fiber.
4. fiber stub according to claim 1 and 2 is characterized in that, the optical fiber in the said fiber stub is multimode optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104461696A CN102411174A (en) | 2011-12-28 | 2011-12-28 | Optical fiber core insert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104461696A CN102411174A (en) | 2011-12-28 | 2011-12-28 | Optical fiber core insert |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102411174A true CN102411174A (en) | 2012-04-11 |
Family
ID=45913352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104461696A Pending CN102411174A (en) | 2011-12-28 | 2011-12-28 | Optical fiber core insert |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102411174A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000266939A (en) * | 1999-03-12 | 2000-09-29 | Japan Aviation Electronics Industry Ltd | Optical fiber connector |
| CN2532496Y (en) * | 2001-12-27 | 2003-01-22 | 福州康顺光通讯有限公司 | Double-side double optical fibre head |
| CN2557961Y (en) * | 2002-05-16 | 2003-06-25 | 武汉光迅科技有限责任公司 | Optical fibre array |
| CN201974547U (en) * | 2010-12-31 | 2011-09-14 | 航天时代电子技术股份有限公司 | Vibration-resisting optical fiber contact element |
-
2011
- 2011-12-28 CN CN2011104461696A patent/CN102411174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000266939A (en) * | 1999-03-12 | 2000-09-29 | Japan Aviation Electronics Industry Ltd | Optical fiber connector |
| CN2532496Y (en) * | 2001-12-27 | 2003-01-22 | 福州康顺光通讯有限公司 | Double-side double optical fibre head |
| CN2557961Y (en) * | 2002-05-16 | 2003-06-25 | 武汉光迅科技有限责任公司 | Optical fibre array |
| CN201974547U (en) * | 2010-12-31 | 2011-09-14 | 航天时代电子技术股份有限公司 | Vibration-resisting optical fiber contact element |
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Application publication date: 20120411 |