CN102368107A - Laser optical fiber coupling device containing non-imaging optical element - Google Patents
Laser optical fiber coupling device containing non-imaging optical element Download PDFInfo
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- CN102368107A CN102368107A CN2011103380988A CN201110338098A CN102368107A CN 102368107 A CN102368107 A CN 102368107A CN 2011103380988 A CN2011103380988 A CN 2011103380988A CN 201110338098 A CN201110338098 A CN 201110338098A CN 102368107 A CN102368107 A CN 102368107A
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- optical fiber
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- laser tube
- imaging
- fiber coupling
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Abstract
The invention provides a laser optical fiber coupling device containing a non-imaging optical element, belonging to the field of semiconductor illumination. The light source comprises a semiconductor laser tube, a non-imaging condensing lens and an optical fiber; the semiconductor laser tube emits light beams; the light beams are converged on the rear surface of the non-imaging condensing lens after passing through the non-imaging condensing lens; and then the light beams enter the optical fiber to form into a laser optical fiber source. According to the device provided by the invention, as the non-imaging condensing lens is adopted, the light emitted by the laser tube can be converged on the rear surface of the non-imaging condensing lens; meanwhile as the front surface aperture of the non-imaging condensing lens is large, the adjusting tolerance is large relative to the position of the laser tube. When the device is installed and positioned, the mechanical precision dependent on the metal holder can be ensured, and no fine adjustment is required. The adjusting process is simple, and the probability of damage of the laser tube and optical fiber due to caused by touching between the optical fiber and the laser tube during adjustment is reduced, so that the rate of finished product is increased, the adjusting time is reduced and the cost is reduced.
Description
Technical field
The invention belongs to field of semiconductor illumination, relate to a kind of laser fiber coupling device that contains the nonimaging optics element.
Background technology
Along with the raising of semiconductor laser performance, be that basic laser lighting technology is used more and more widely in security protection monitoring field with the semiconductor laser.Because the luminous mode characteristic of semiconductor laser self, its hot spot is inhomogeneous, light and dark striped occurs.Therefore after semiconductor laser must pass through the shaping homogenize, just can be used for night illumination.
Shaping technique at present comparatively commonly used is that the light with laser tube is directly coupled in the optical fiber; But this coupling process; Because the optical fiber core diameter is thinner; Need the spacing of optical fiber head and laser tube light-emitting area be adjusted to very for a short time during coupling, adjust the lateral attitude of optical fiber head simultaneously with respect to the laser tube light-emitting area.In the adjustment process, be easy to cause optical fiber head to contact with the laser tube light-emitting area, thereby damage laser tube and optical fiber, adjustment process length consuming time has simultaneously improved the cost of laser fiber coupling light source.A kind of in addition coupling process commonly used is to enter into optical fiber after utilizing self-focus lens also to make Green lens that the light of laser tube is assembled again; But the self-focus lens material is special, and price comparison is expensive, and it is little to debug tolerance simultaneously; Adjustment process is complicated during coupling, length consuming time.
Summary of the invention
Bad in order to solve the prior art illumination uniformity; Hot spot is inhomogeneous; The very high shortcoming of light and dark striped and cost occurs, the object of the present invention is to provide a kind of laser fiber coupling device that contains the nonimaging optics element, its technical scheme can solve the problem that prior art exists.
A kind of laser fiber coupling device that contains the nonimaging optics element; This device comprises semiconductor laser tube, non-imaging condenser and optical fiber; The semiconductor laser tube emitted light beams is assembled on the back surface of non-imaging condenser, and the light beam of convergence is incident to optical fiber, forms the laser fiber device.
The present invention couples light in the optical fiber what semiconductor laser tube was sent, forms uniform source of light, and the hot spot that has overcome semiconductor laser tube self is inhomogeneous, and the shortcoming of light and dark striped is arranged.During the optical fiber coupling, adopted non-imaging condenser, can the optical convergence that laser tube sends is surperficial in the back, because the front surface bore is big,, has and debug tolerance more greatly simultaneously with respect to the position of laser tube.During installing and locating, rely on the mechanical precision of metal frame just can guarantee, do not need meticulous adjustment.Adjustment process is simple, owing to optical fiber is touched the probability that laser tube damages laser tube and optical fiber, improves yield rate in the minimizing adjustment process, reduces the adjustment time, reduces cost.
Description of drawings
A kind of structural representation that contains the laser fiber coupling device of nonimaging optics element of Fig. 1 the present invention.
A kind of non-imaging optical collector structure synoptic diagram that contains the laser fiber coupling device of nonimaging optics element of Fig. 2 the present invention.
Among the figure: 1, semiconductor laser tube, 2, non-imaging condenser, 3, optical fiber, 4, the metal fixed mount, 5, metal tube, 6, drive circuit board, 7, fan, 8, the mechanical encapsulation shell, 9, front surface, 10, the surface, back, 11, side surface, 12, hollow cylinder.
Embodiment
By shown in Figure 1; A kind of laser fiber coupling device that contains the nonimaging optics element, this light source comprises: semiconductor laser tube 1, non-imaging condenser 2 and optical fiber 3, said semiconductor laser tube 1 is launched light beam; Light beam through non-imaging condenser 2 after; Back surface at non-imaging condenser 2 is assembled, and light beam gets in the optical fiber 3 then, forms laser fiber light source.This light source also comprises: drive circuit board 6, fan 7 and mechanical encapsulation shell 8, semiconductor laser tube 1, non-imaging condenser 2, drive circuit board 6 and fan 7 integrated being encapsulated in the mechanical encapsulation shell 8.
By shown in Figure 2; Said non-imaging condenser 2 front surfaces 9 are sphere; Surface, back 10 is the plane; The free form surface that side surface 11 designs according to the marginal ray principle in the nonimaging optics theory and refraction law can reflex to the surface, back, peripheral hollow cylinder 12 fixing non-imaging condensers 2 again through the light that total reflection will be incided side surface.Learn that through Fig. 1 and Fig. 2 the peripheral right cylinder 12 and the metal fixed mount 4 of said non-imaging condenser 2 join and be fixed in the mechanical encapsulation shell 8.
Said non-imaging condenser 2 apart from semiconductor laser tube 1 light-emitting area apart from the d value in the 2mm-3mm scope.Non-imaging condenser 2 front surfaces 9 clear aperture D
1Value be the 3dtan θ of semiconductor laser tube 1 emergence angle θ to 4dtan θ, the scope of front surface radius-of-curvature is D
1To 2D
1The thickness of said non-imaging condenser 2 is
Said non-imaging condenser 2 surface plating anti-reflection films.The material of non-imaging condenser 2 is low temperature glass or plastics, and non-imaging condenser 2 adopts injection moulding, engraving, cutting, polishing or the arbitrary mode of die casting to process.
Said optical fiber 3 has connector, directly contacts with surface, back 10 through metal tube 5, and the clear aperture D on the core diameter of optical fiber 3 and surface, back 10
2Equate.
Drive circuit board 6 provides stable rated operational current to semiconductor laser tube 1 and fan 7, and fan 7 distributes the heat that semiconductor laser tube 1 produces through convection type.Mechanical encapsulation shell 8 is semiconductor laser tube 1, drive circuit board 6, the fan 7 integrated one that are packaged into, and through the outside distribute heat of heat exchange pattern.
Semiconductor laser tube 1 light-emitting area is 0.15mm in the present embodiment, and luminous power is 3w, and the laser beam angle of sending is 10 degree, and non-imaging condenser 2 is 2mm to semiconductor laser tube 1 spacing d, non-imaging condenser 2 front surface radius of curvature R
1Be 1mm, clear aperture D
1Be 1mm, back surface bore D
2Be 0.2mm, non-imaging condenser 2 thickness are 4.5mm, and the hollow cylinder body diameter is 2mm, and internal diameter is 1mm.The optical fiber core diameter is 0.2mm.When guaranteeing that coupling efficiency reaches more than 88%, it is 0.2mm that tolerance is debug by system, very loose.
Claims (10)
1. laser fiber coupling device that contains the nonimaging optics element; It is characterized in that; This device comprises semiconductor laser tube (1), non-imaging condenser (2) and optical fiber (3); Said semiconductor laser tube (1) emitted light beams is assembled on the back surface of non-imaging condenser (2), and the light beam after the convergence is incident to optical fiber (3).
2. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 1; It is characterized in that; This device also comprises: drive circuit board (6), fan (7) and mechanical encapsulation shell (8), semiconductor laser tube (1), non-imaging condenser (2), drive circuit board (6) and fan (7) are integrated to be encapsulated in the mechanical encapsulation shell (8).
3. according to claim 1 or claim 2 a kind of laser fiber coupling device that contains the nonimaging optics element; It is characterized in that; This device also comprises the hollow cylinder (12) that is positioned at non-imaging condenser (2) periphery; Said non-imaging condenser (2) is fixed on the mechanical encapsulation shell (8) through peripheral hollow cylinder (12); The front surface (9) of non-imaging condenser (2) is a sphere, and back surface (10) be the plane, and side surface (11) is the free form surface that designs according to the marginal ray principle in the nonimaging optics theory and refraction law.
4. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 3; It is characterized in that; This device also comprises metal fixed mount (4), and said hollow cylinder (12) joins with metal fixed mount (4) and is fixed in the mechanical encapsulation shell (8).
5. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 3 is characterized in that, said front surface (9) apart from semiconductor laser tube (1) light-emitting area apart from the d value in the 2mm-3mm scope.
6. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 3 is characterized in that the clear aperture D of said front surface (9)
1Span be the 3dtan θ of semiconductor laser tube (1) the emergence angle θ that sends light beam to 4dtan θ, d is the distance of front surface (9) apart from semiconductor laser tube (1) light-emitting area, the radius of curvature R of front surface (9)
1Scope be D
1To 2D
1
7. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 1 is characterized in that the thickness of said non-imaging condenser (2) does
θ is the emergence angle that semiconductor laser tube (1) is sent light beam, D
1Clear aperture for front surface (9).
8. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 1 is characterized in that, the front surface of said non-imaging condenser (2), surface, back and side surface all plate anti-reflection film.
9. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 1; It is characterized in that; Said non-imaging condenser (2) employing injection moulding, engraving, cutting, polishing or die casting wherein any one mode are processed, and non-imaging condenser (2) material is low temperature glass or plastics.
10. a kind of laser fiber coupling device that contains the nonimaging optics element as claimed in claim 1; It is characterized in that; Said optical fiber (3) has connector; Light beam gets into optical fiber through connector, and optical fiber (3) directly contacts with surface, back (10) through metal tube (5), and the core diameter of optical fiber (3) equates with the clear aperture on surface, back (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103380988A CN102368107A (en) | 2011-10-31 | 2011-10-31 | Laser optical fiber coupling device containing non-imaging optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103380988A CN102368107A (en) | 2011-10-31 | 2011-10-31 | Laser optical fiber coupling device containing non-imaging optical element |
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| Publication Number | Publication Date |
|---|---|
| CN102368107A true CN102368107A (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103380988A Pending CN102368107A (en) | 2011-10-31 | 2011-10-31 | Laser optical fiber coupling device containing non-imaging optical element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869429A (en) * | 2012-12-13 | 2014-06-18 | 鸿富锦精密工业（深圳）有限公司 | Photoelectric coupler and photoelectric conversion device using same |
| CN104793292A (en) * | 2015-04-27 | 2015-07-22 | 中国科学院光电技术研究所 | Optical fiber coupling system based on hybrid parabolic condenser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4898450A (en) * | 1987-08-31 | 1990-02-06 | Physical Optics Corporation | Expanded beam non-imaging fiber optic connector |
| CN201017078Y (en) * | 2007-03-17 | 2008-02-06 | 中国工程物理研究院电子工程研究所 | High-power laser injection optical fiber coupling device |
| CN101241209A (en) * | 2007-12-18 | 2008-08-13 | 中国工程物理研究院电子工程研究所 | Hollow light guide cone coupling vacuum transmission laser device |
-
2011
- 2011-10-31 CN CN2011103380988A patent/CN102368107A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4898450A (en) * | 1987-08-31 | 1990-02-06 | Physical Optics Corporation | Expanded beam non-imaging fiber optic connector |
| CN201017078Y (en) * | 2007-03-17 | 2008-02-06 | 中国工程物理研究院电子工程研究所 | High-power laser injection optical fiber coupling device |
| CN101241209A (en) * | 2007-12-18 | 2008-08-13 | 中国工程物理研究院电子工程研究所 | Hollow light guide cone coupling vacuum transmission laser device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869429A (en) * | 2012-12-13 | 2014-06-18 | 鸿富锦精密工业（深圳）有限公司 | Photoelectric coupler and photoelectric conversion device using same |
| CN104793292A (en) * | 2015-04-27 | 2015-07-22 | 中国科学院光电技术研究所 | Optical fiber coupling system based on hybrid parabolic condenser |
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Application publication date: 20120307 |