CN103605183B - Hectowatt-level high-isolation collimating-type optical isolator - Google Patents
Hectowatt-level high-isolation collimating-type optical isolator Download PDFInfo
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- CN103605183B CN103605183B CN201310488924.6A CN201310488924A CN103605183B CN 103605183 B CN103605183 B CN 103605183B CN 201310488924 A CN201310488924 A CN 201310488924A CN 103605183 B CN103605183 B CN 103605183B
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Abstract
The invention discloses a hectowatt-level high-isolation collimating-type optical isolator. The hectowatt-level high-isolation collimating-type optical isolator comprises a cooling device (1), a mode stripper (2), an optical fiber collimator (3) and a beam expander (7); the mode stripper (2), the optical fiber collimator (3), a first optical isolator core member (4), two symmetrically-arranged reflectors (5), a second optical isolator core member (6) and the beam expander (7) are sequentially arranged in the cooling device (1) along the incident optical axis of forward light; and the mode stripper (2) is connected with the optical fiber collimator (3) through an optical fiber (8). The hectowatt-level high-isolation collimating-type optical isolator of the invention has the advantages of high isolation, favorable heat dissipation and excellent stable working performance, and can be used for large-power pulse lasers.
Description
Technical field
The present invention relates to a kind of optoisolator, particularly a kind of Hectowatt-level high-isolation collimating-type optical isolator, belongs to Laser Processing, i.e. cut, laser bonding, laser engraving and laser 3D printing etc., laser weapon, laser radar communication and laser sensing field.
Background technology
Semiconductor laser, image intensifer and fiber laser etc. are very responsive for the reflected light from connector, fusion point, wave filter etc., and penalty may be caused even to damage, and therefore need to stop reflected light with optoisolator.Optoisolator be only allow light along a direction by and stop the optical passive component that light passes through in contrary direction.Its effect prevents the reverse transfer light produced due to a variety of causes in light path from producing harmful effect to light source and light path system.
But present stage the optoisolator power that can carry and the degree of isolation that can reach all not high enough, have impact on the development of high-end hectowatt grade fiber laser dramatically.Therefore, high-end hectowatt grade optoisolator and its high-isolation are breaches of improving high-end fiber laser performance.
The overwhelming majority of current domestic use is some low power optoisolators, and often between several watts to tens watts, the optoisolator reaching more than hectowatt grade is little.Because when it come to arrive high power often because technical reason, easily occur the phenomenons such as insertion loss is large, radiating effect is bad, and the isolation of existing optoisolator is not high, job stability is poor.In sum, the optoisolator developing a kind of high-end Hectowatt-level high-isolation is imperative.
Summary of the invention
The object of the invention is to, a kind of Hectowatt-level high-isolation collimating-type optical isolator is provided, it has the advantage of high-isolation, good heat dissipation effect and stable work in work, can be used to well in the laser optics application such as high-power pulsed laser, high power CW laser instrument.
Technical scheme of the present invention: a kind of Hectowatt-level high-isolation collimating-type optical isolator, comprise cooling device, mode stripper, optical fiber collimator and beam expanding lens, along forward light incident light axis being provided with successively mode stripper, optical fiber collimator, the first optoisolator chipware, 2 symmetrically arranged catoptrons, the second optoisolator chipware and beam expanding lenss in cooling device, mode stripper is connected with optical fiber collimator by optical fiber.By arranging mode stripper, can the pump light of cancellation remnants, the laser draining to the higher order mode transmitted inner cladding from fibre core can also be divested.By arranging cooling device, heat eliminating medium directly being held with optical device heat and directly contacts, drastically increasing radiating effect, thus improve the stability of optoisolator, make it under long high power work state, still can keep stable work.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, described optical fiber collimator comprises patch cord and lens, and patch cord scioptics are connected with the light path of the first optoisolator chipware; The afterbody of patch cord is provided with end cap.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, described first optoisolator chipware is identical with the structure of the second optoisolator chipware, includes along the first birefringece crystal that forward light incident light axis sets gradually, Faraday polarization apparatus, 1/2 wave plate and the second birefringece crystal; Described 1/2 wave plate passes through ultra-violet curing glue on the light inlet end face of the second birefringece crystal.First birefringece crystal and the second birefringece crystal all adopt YVO4 crystal.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, also comprise magnetic tube, described Faraday polarization apparatus is located in magnetic tube, and the two ends of magnetic tube (16) are located at respectively by the first birefringece crystal and the second birefringece crystal; The optically-active angle of described Faraday polarization apparatus is 45 °.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, described 2 angles between catoptron and optical axis are 40 ° ~ 50 °; Described catoptron adopts ceramic reflecting mirror, bronze mirror or high anti-catoptron.The gap that between described 2 catoptrons, formation one is very little, the effect of diaphragm is played in this gap.Catoptron can adopt ceramic reflecting mirror, bronze mirror or high anti-catoptron, and the good material of other reflective function also can be adopted to make.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, described beam expanding lens comprises negative lens along forward light incident light axis sets gradually and positive lens.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, the side being provided with positive lens in described cooling device is provided with large diaphragm; Little diaphragm is provided with between optical fiber collimator and the first optoisolator chipware.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, described cooling device comprises housing, cooling chamber, inlet and liquid outlet, the two ends of described housing are equipped with inlet and liquid outlet, inlet is located at the below of housing, and liquid outlet is located at the top of housing, is hollow structure between the outer wall of housing and inwall, described inlet is connected with this hollow structure with liquid outlet, cooling chamber is arranged on the one end in housing, and cooling chamber is communicated with hollow structure, and mode stripper is located in cooling chamber.Be filled with heat eliminating medium in the hollow structure of described inwall also between outer wall, heat eliminating medium adopts water or oil; Arrange cooling chamber in one end of housing and be arranged in cooling chamber by mode stripper, object is to enable film device directly contact with heat eliminating medium, better dispelling the heat.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, in described housing, the inwall corresponding with reflector position is provided with the diaphragm of F:-10 ~ 0mm.
In aforesaid Hectowatt-level high-isolation collimating-type optical isolator, in described housing, the inwall corresponding with reflector position is provided with the diaphragm of F:-5mm.
Compared with prior art, the present invention, by arranging cooling device, effectively improves radiating effect, thus improves the stability of optoisolator, makes it under long high power work state, still can keep stable work.By arranging diaphragm on the inwall of housing, by the beam divergence that reflects along light path in heat eliminating medium, effectively can prevent reflected light from shining directly on inwall, play the effect of protection inwall on the one hand, can more effectively dispel the heat on the other hand.
By arranging mode stripper, before light incides collimating apparatus, first being carried out the process of stripping mould, divested harmful light, the laser draining to the higher order mode transmitted inner cladding from fibre core can also be divested, available protecting collimating apparatus.Adopt the power that the collimating apparatus of end cap and lens combination can make it larger than traditional collimating apparatus carrying.
By arranging 2 optoisolator chipwares and coordinating 2 symmetrically arranged catoptrons jointly to use, the present invention is made to adequately achieve the high-isolation of optoisolator.
Accompanying drawing explanation
Fig. 1 is that forward of the present invention leads to light schematic diagram;
Fig. 2 is oppositely logical light schematic diagram of the present invention;
Fig. 3 is the structural representation of cooling device.
Being labeled as in accompanying drawing: 1-cooling device, 2-mode stripper, 3-optical fiber collimator, 4-first optoisolator chipware, 5-catoptron, 6-second optoisolator chipware, 7-beam expanding lens, 8-optical fiber, 9-patch cord, 10-lens, 11-end cap, 12-first birefringece crystal, 13-Faraday polarization apparatus, 14-1/2 wave plate, 15-second birefringece crystal, 16-magnetic tube, 17-negative lens, 18-positive lens, the large diaphragm of 19-, the little diaphragm of 20-, 21-cooling chamber, 22-inlet, 23-liquid outlet, 24-housing, 25-diaphragm.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, but not as foundation the present invention being done to any restriction.
Embodiments of the invention 1: as depicted in figs. 1 and 2, a kind of Hectowatt-level high-isolation collimating-type optical isolator, comprise cooling device 1, mode stripper 2, optical fiber collimator 3 and beam expanding lens 7, along forward light incident light axis being provided with successively mode stripper 2, symmetrically arranged catoptron 5, the second optoisolator chipware 6 of optical fiber collimator 3, first optoisolator chipware 4,2 and beam expanding lens 7 in cooling device 1, mode stripper 2 is connected with optical fiber collimator 3 by optical fiber 8.Optical fiber collimator 3 comprises patch cord 9 and lens 10, and patch cord 9 scioptics 10 are connected with the light path of the first optoisolator chipware 4; The afterbody of patch cord 9 is provided with end cap 11.Also comprise magnetic tube 16, described Faraday polarization apparatus 13 is located in magnetic tube 16, and the two ends of magnetic tube 16 are located at respectively by the first birefringece crystal 12 and the second birefringece crystal 15; The optically-active angle of described Faraday polarization apparatus 13 is 45 °.Described beam expanding lens 7 comprises negative lens 17 along forward light incident light axis sets gradually and positive lens 18.The side being provided with positive lens 18 in described cooling device 1 is provided with large diaphragm 19; Little diaphragm 20 is provided with between optical fiber collimator 3 and the first optoisolator chipware 4.
Described first optoisolator chipware 4 is identical with the structure of the second optoisolator chipware 6, includes along the first birefringece crystal 12 that forward light incident light axis sets gradually, Faraday polarization apparatus 13,1/2 wave plate 14 and the second birefringece crystal 15; Described 1/2 wave plate 14 passes through ultra-violet curing glue on the light inlet end face of the second birefringece crystal 15.Angle between 2 catoptrons 5 and optical axis is 45 °; Described catoptron 5 adopts ceramic reflecting mirror, bronze mirror or high anti-catoptron.
As shown in Figure 3, cooling device 1 comprises housing 24, cooling chamber 21, inlet 22 and liquid outlet 23, the two ends of described housing 24 are equipped with inlet 22 and liquid outlet 23, inlet 22 is located at the below of housing 24, and liquid outlet 23 is located at the top of housing 24, is hollow structure between the outer wall of housing 24 and inwall, described inlet 22 is connected with this hollow structure with liquid outlet 23, cooling chamber 21 is arranged on the one end in housing 24, and cooling chamber 21 is communicated with hollow structure, and mode stripper 2 is located in cooling chamber 21.In described housing 24, the inwall corresponding with catoptron 5 position is provided with the diaphragm 25 of F:-5mm.
Embodiments of the invention 2: as depicted in figs. 1 and 2, a kind of Hectowatt-level high-isolation collimating-type optical isolator, comprise cooling device 1, mode stripper 2, optical fiber collimator 3 and beam expanding lens 7, along forward light incident light axis being provided with successively mode stripper 2, symmetrically arranged catoptron 5, the second optoisolator chipware 6 of optical fiber collimator 3, first optoisolator chipware 4,2 and beam expanding lens 7 in cooling device 1, mode stripper 2 is connected with optical fiber collimator 3 by optical fiber 8.Optical fiber collimator 3 comprises patch cord 9 and lens 10, and patch cord 9 scioptics 10 are connected with the light path of the first optoisolator chipware 4; The afterbody of patch cord 9 is provided with end cap 11.Also comprise magnetic tube 16, described Faraday polarization apparatus 13 is located in magnetic tube 16, and the two ends of magnetic tube 16 are located at respectively by the first birefringece crystal 12 and the second birefringece crystal 15; The optically-active angle of described Faraday polarization apparatus 13 is 45 °.Described beam expanding lens 7 comprises negative lens 17 along forward light incident light axis sets gradually and positive lens 18.The side being provided with positive lens 18 in described cooling device 1 is provided with large diaphragm 19; Little diaphragm 20 is provided with between optical fiber collimator 3 and the first optoisolator chipware 4.
Described first optoisolator chipware 4 is identical with the structure of the second optoisolator chipware 6, includes along the first birefringece crystal 12 that forward light incident light axis sets gradually, Faraday polarization apparatus 13,1/2 wave plate 14 and the second birefringece crystal 15; Described 1/2 wave plate 14 passes through ultra-violet curing glue on the light inlet end face of the second birefringece crystal 15.Angle between 2 catoptrons 5 and optical axis is 40 °; Described catoptron 5 adopts ceramic reflecting mirror, bronze mirror or high anti-catoptron.
As shown in Figure 3, cooling device 1 comprises housing 24, cooling chamber 21, inlet 22 and liquid outlet 23, the two ends of described housing 24 are equipped with inlet 22 and liquid outlet 23, inlet 22 is located at the below of housing 24, and liquid outlet 23 is located at the top of housing 24, is hollow structure between the outer wall of housing 24 and inwall, described inlet 22 is connected with this hollow structure with liquid outlet 23, cooling chamber 21 is arranged on the one end in housing 24, and cooling chamber 21 is communicated with hollow structure, and mode stripper 2 is located in cooling chamber 21.In described housing 24, the inwall corresponding with catoptron 5 position is provided with the diaphragm 25 of F:-10mm.
Embodiments of the invention 3: as depicted in figs. 1 and 2, a kind of Hectowatt-level high-isolation collimating-type optical isolator, comprise cooling device 1, mode stripper 2, optical fiber collimator 3 and beam expanding lens 7, along forward light incident light axis being provided with successively mode stripper 2, symmetrically arranged catoptron 5, the second optoisolator chipware 6 of optical fiber collimator 3, first optoisolator chipware 4,2 and beam expanding lens 7 in cooling device 1, mode stripper 2 is connected with optical fiber collimator 3 by optical fiber 8.Optical fiber collimator 3 comprises patch cord 9 and lens 10, and patch cord 9 scioptics 10 are connected with the light path of the first optoisolator chipware 4; The afterbody of patch cord 9 is provided with end cap 11.Also comprise magnetic tube 16, described Faraday polarization apparatus 13 is located in magnetic tube 16, and the two ends of magnetic tube 16 are located at respectively by the first birefringece crystal 12 and the second birefringece crystal 15; The optically-active angle of described Faraday polarization apparatus 13 is 45 °.Described beam expanding lens 7 comprises negative lens 17 along forward light incident light axis sets gradually and positive lens 18.The side being provided with positive lens 18 in described cooling device 1 is provided with large diaphragm 19; Little diaphragm 20 is provided with between optical fiber collimator 3 and the first optoisolator chipware 4.
Described first optoisolator chipware 4 is identical with the structure of the second optoisolator chipware 6, includes along the first birefringece crystal 12 that forward light incident light axis sets gradually, Faraday polarization apparatus 13,1/2 wave plate 14 and the second birefringece crystal 15; Described 1/2 wave plate 14 passes through ultra-violet curing glue on the light inlet end face of the second birefringece crystal 15.Angle between 2 catoptrons 5 and optical axis is 50 °; Described catoptron 5 adopts ceramic reflecting mirror, bronze mirror or high anti-catoptron.
As shown in Figure 3, cooling device 1 comprises housing 24, cooling chamber 21, inlet 22 and liquid outlet 23, the two ends of described housing 24 are equipped with inlet 22 and liquid outlet 23, inlet 22 is located at the below of housing 24, and liquid outlet 23 is located at the top of housing 24, is hollow structure between the outer wall of housing 24 and inwall, described inlet 22 is connected with this hollow structure with liquid outlet 23, cooling chamber 21 is arranged on the one end in housing 24, and cooling chamber 21 is communicated with hollow structure, and mode stripper 2 is located in cooling chamber 21.In described housing 24, the inwall corresponding with catoptron 5 position is provided with the diaphragm 25 of F:0mm.
Principle of work of the present invention: as shown in Figure 1, during the transmission of light forward, the light beam of transmission in optical fiber 8, by entering optical fiber collimator 3 through end cap 11 after mode stripper 2, is converted into collimated light by light, improves coupling efficiency.Then light enters the first birefringece crystal 12 on the first optoisolator chipware 4, be divided into o light and e light, both separate rapidly the Faraday polarization apparatus 13 that certain angle transmission enters 45 °, have rotated 45 ° by the vibration plane of Faraday polarization apparatus 13, o light and e light respectively towards same direction.Postrotational o light and e light, after 1/2 wave plate 14, all change 45 ° to same direction again.O light now and e light enter the second birefringece crystal 15, and close light and incide on the second optoisolator chipware 6, the conjunction light after the two the second optoisolator chipwares 6 process incides beam expanding lens 7 bright dipping, achieve the forward transmission of light.
As shown in Figure 2, when light path is reverse, light first by large diaphragm 19 and beam expanding lens 7, and then incides in the second birefringece crystal 9 of the second optoisolator chipware 6, is divided into o light and e light fast.The o light returned and e light are through the effect of 1/2 wave plate 15, and its vibration plane changes 45 ° respectively towards same direction again.Due to the nonreciprocity of Faraday effect, o light and e light are by after Faraday rotator 13, and polarization direction still rotates 45 ° to same direction, and o light original has like this become e light and o light with e light after entering the first birefringece crystal 12.Due to the difference of refractive index, this two separating light beam no longer pools a light beam along original light path, and the distance making it be separated on the contrary increases.By the reflection of catoptron 5, o light and e light respectively to be reflected separately perpendicular to the direction of 90 °, optical axis, then diffuse in the heat eliminating medium in housing 24 through the effect of diaphragm 25.Part is injected into the light of the first optoisolator chipware 4 by the aperture between catoptron, under the effect of the first optoisolator chipware 4, be divided into arduous larger o light and e light, o light and e light are blocked by little optical cable 20 and can not be injected in light collimator 3.
The heat produced in these two processes, in apparatus for supercooling 1, the circulation of heat eliminating medium, takes out of rapidly, thus reaches good radiating effect.Heat eliminating medium adopts water or oil.
Claims (9)
1. a Hectowatt-level high-isolation collimating-type optical isolator, it is characterized in that: comprise cooling device (1), mode stripper (2), optical fiber collimator (3) and beam expanding lens (7), along forward light incident light axis being provided with successively mode stripper (2), optical fiber collimator (3), the first optoisolator chipware (4), 2 symmetrically arranged catoptrons (5), the second optoisolator chipware (6) and beam expanding lenss (7) in cooling device (1), mode stripper (2) is connected with optical fiber collimator (3) by optical fiber (8); Described 2 symmetrically arranged catoptrons (5) for by reflected light o light and e light respectively to be reflected separately perpendicular to the direction of 90 °, optical axis, then to diffuse in heat eliminating medium.
2. Hectowatt-level high-isolation collimating-type optical isolator according to claim 1, it is characterized in that: described optical fiber collimator (3) comprises patch cord (9) and lens (10), patch cord (9) scioptics (10) are connected with the light path of the first optoisolator chipware (4); The afterbody of patch cord (9) is provided with end cap (11).
3. Hectowatt-level high-isolation collimating-type optical isolator according to claim 1, it is characterized in that: described first optoisolator chipware (4) is identical with the structure of the second optoisolator chipware (6), include along the first birefringece crystal (12) that forward light incident light axis sets gradually, Faraday polarization apparatus (13), 1/2 wave plate (14) and the second birefringece crystal (15); Described 1/2 wave plate (14) by ultra-violet curing glue on the light inlet end face of the second birefringece crystal (15).
4. Hectowatt-level high-isolation collimating-type optical isolator according to claim 3, it is characterized in that: also comprise magnetic tube (16), described Faraday polarization apparatus (13) is located in magnetic tube (16), and the two ends of magnetic tube (16) are located at respectively by the first birefringece crystal (12) and the second birefringece crystal (15); The optically-active angle of described Faraday polarization apparatus (13) is 45 °.
5. Hectowatt-level high-isolation collimating-type optical isolator according to claim 1, is characterized in that: the angle between described 2 catoptrons (5) and optical axis is 40 ° ~ 50 °; Described catoptron (5) adopts ceramic reflecting mirror or bronze mirror.
6. Hectowatt-level high-isolation collimating-type optical isolator according to claim 1, is characterized in that: described beam expanding lens (7) comprises negative lens (17) along forward light incident light axis sets gradually and positive lens (18).
7. Hectowatt-level high-isolation collimating-type optical isolator according to claim 6, is characterized in that: the side being provided with positive lens (18) in described cooling device (1) is provided with large diaphragm (19); Little diaphragm (20) is provided with between optical fiber collimator (3) and the first optoisolator chipware (4).
8. according to the Hectowatt-level high-isolation collimating-type optical isolator in claim 1 ~ 7 described in any one, it is characterized in that: described cooling device (1) comprises housing (24), cooling chamber (21), inlet (22) and liquid outlet (23), the two ends of described housing (24) are equipped with inlet (22) and liquid outlet (23), inlet (22) is located at the below of housing (24), liquid outlet (23) is located at the top of housing (24), be hollow structure between the outer wall of housing (24) and inwall, described inlet (22) is connected with this hollow structure with liquid outlet (23), cooling chamber (21) is arranged on the one end in housing (24), cooling chamber (21) is communicated with hollow structure, mode stripper (2) is located in cooling chamber (21).
9. Hectowatt-level high-isolation collimating-type optical isolator according to claim 8, is characterized in that: in described housing (24), the inwall corresponding with catoptron (5) position is provided with the diaphragm (25) of F:-10 ~ 0mm.
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| CN201310488924.6A CN103605183B (en) | 2013-10-17 | 2013-10-17 | Hectowatt-level high-isolation collimating-type optical isolator |
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| CN201310488924.6A CN103605183B (en) | 2013-10-17 | 2013-10-17 | Hectowatt-level high-isolation collimating-type optical isolator |
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| CN2426167Y (en) * | 2000-05-24 | 2001-04-04 | ***武汉邮电科学研究院 | Double-stage photo-insulator |
| TW505243U (en) * | 2002-01-18 | 2002-10-01 | Hon Hai Prec Ind Co Ltd | Optical fiber isolator |
| CN201417351Y (en) * | 2009-06-25 | 2010-03-03 | 福州高意通讯有限公司 | An optical isolator of high power |
| CN202939382U (en) * | 2012-11-12 | 2013-05-15 | 光越科技(深圳)有限公司 | Optical isolator |
| KR101283678B1 (en) * | 2011-07-26 | 2013-08-23 | (주)옵토위즈 | Optical transceiver Module Integrated WDM coupler and Bi-directional Optical Sub-Assembly |
| CN203551836U (en) * | 2013-10-17 | 2014-04-16 | 深圳市创鑫激光技术有限公司 | Hundred-watt high-isolation collimation type optical isolator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7308171B2 (en) * | 2005-11-16 | 2007-12-11 | Raydiance, Inc. | Method and apparatus for optical isolation in high power fiber-optic systems |
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2013
- 2013-10-17 CN CN201310488924.6A patent/CN103605183B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426167Y (en) * | 2000-05-24 | 2001-04-04 | ***武汉邮电科学研究院 | Double-stage photo-insulator |
| TW505243U (en) * | 2002-01-18 | 2002-10-01 | Hon Hai Prec Ind Co Ltd | Optical fiber isolator |
| CN201417351Y (en) * | 2009-06-25 | 2010-03-03 | 福州高意通讯有限公司 | An optical isolator of high power |
| KR101283678B1 (en) * | 2011-07-26 | 2013-08-23 | (주)옵토위즈 | Optical transceiver Module Integrated WDM coupler and Bi-directional Optical Sub-Assembly |
| CN202939382U (en) * | 2012-11-12 | 2013-05-15 | 光越科技(深圳)有限公司 | Optical isolator |
| CN203551836U (en) * | 2013-10-17 | 2014-04-16 | 深圳市创鑫激光技术有限公司 | Hundred-watt high-isolation collimation type optical isolator |
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Address after: 518104, Guangdong, Shenzhen, Baoan District manhole, South Ring Road and a community third industrial zone, Ming Industrial Park, the first third West Applicant after: MAXPHOTONICS Co.,Ltd. Address before: 518104, Guangdong, Shenzhen, Baoan District manhole, South Ring Road and a community third industrial zone, Ming Industrial Park, the first third West Applicant before: Maxphotonics Co., Ltd. |
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