CN2560972Y - Optoisolator - Google Patents
Optoisolator Download PDFInfo
- Publication number
- CN2560972Y CN2560972Y CN 02225446 CN02225446U CN2560972Y CN 2560972 Y CN2560972 Y CN 2560972Y CN 02225446 CN02225446 CN 02225446 CN 02225446 U CN02225446 U CN 02225446U CN 2560972 Y CN2560972 Y CN 2560972Y
- Authority
- CN
- China
- Prior art keywords
- fiber optic
- optoisolator
- optic collimator
- die casting
- collimator device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a light isolator, which comprises the first fiber collimating device, the second fiber collimating device and an isolation center positioned between the two fiber collimating devices. The first fiber collimating device has same structure with the second fiber collimating device, which comprises a fiber needle with fiber and a molding lens. The isolation center is for transmitting the light beam from the first fiber collimating device to the second fiber collimating device, and also isolating the returned beam from the second fiber collimating device. The light isolator also comprises an outer sleeving for sleeving and fixing the first and the second fiber collimating devices and also the isolation center.
Description
[technical field]
The utility model is about a kind of optoisolator, and especially about a kind of optoisolator that is applied to optical communication field, it comprises the fiber optic collimator device that adopts the die casting lens to realize beam collimation.
[background technology]
Because light signal can pass through a plurality of different optical interfaces when transmit in optical communication system, and in various degree reflection all can occur at each optical interface, the return light may that reflects generation may be passed light source back along original optical path.When return light may intensity is accumulated to a certain degree, can causes problems such as light source works instability and generation frequency drift, thereby influence the total system operate as normal.Therefore, for guaranteeing the craftmanship of optical communication system, adopt the influence of return light may in the optoisolator elimination light path very necessary.
Existing optoisolator generally comprises a quarantine center, and this quarantine center comprises the magneto-optical crystal of two birefringece crystals, between two birefringece crystals and the magnet ring of a suit magneto-optical crystal.During work, one birefringece crystal will be imported light and be separated into the mutually perpendicular two-beam in polarization direction, magneto-optical crystal makes the polarization direction of two polarized lights rotate a special angle (as 45 degree) under the action of a magnetic field that magnet ring produced, and another birefringece crystal then merges this two-beam and output.Because the optics nonreciprocity of magneto-optical crystal, return light may can't be assembled by quarantine center, and realize the one-way transmission function of optoisolator.
Because the aperture of optical fiber is less usually, therefore, existing optoisolator is generally at quarantine center both sides configuration fiber optic collimator device, make be input to quarantine center behind the flashlight collimation or with the beam convergence of quarantine center's output to optical fiber, to reduce to insert loss, improve optical property.The fiber optic collimator device that existing optoisolator adopts comprises the optical fiber contact pins of suit protection optical fiber and realizes the GRIN Lens of beam collimation.
But adopt the optoisolator that comprises the fiber optic collimator device of GRIN Lens and constitute that some defectives are arranged.At first, because GRIN Lens adopts ion diffusion to make, its form accuracy is not high, need further to handle, and GRIN Lens need grind to form special angle near the end face of contact pin, thereby causes complex procedures, expend man-hour, and then makes that the optoisolator cost is higher.Secondly, adopt in the process of ions diffusion manufactured GRIN Lens, the chemical material that use some to contain toxin not only can damage operating personnel's health, also contaminated environment.In addition, for improving the whole optical property of optoisolator, the end face of GRIN Lens need plate counnter attack layer (AR-Coating), but because GRIN Lens is the radial refractive index progressive lens, so the reflectivity of plating counnter attack layer rear end face each point is inconsistent, thereby will influence optical property.
In sum, provide a kind of improved optoisolator very necessary.
[utility model content]
The purpose of this utility model is to provide a kind of optoisolator, and this optoisolator adopts die casting lens (Molding Lens) to realize beam collimation, its precision height, optical property is good, manufacturing is convenient, with low cost, be beneficial to environmental protection.
The purpose of this utility model is achieved in that provides an optoisolator, it comprises the first fiber optic collimator device, the second fiber optic collimator device and the quarantine center between two fiber optic collimator devices, this quarantine center to the second fiber optic collimator device, and isolates Returning beam from the second fiber optic collimator device with the beam Propagation of first fiber optic collimator device output.This optoisolator has at least a fiber optic collimator device to comprise the die casting lens of realizing beam collimation.
Wherein, this quarantine center comprises first birefringece crystal, second birefringece crystal and is positioned between the two magneto-optical crystal.This optoisolator also comprises an outer tube that is used for first, second fiber optic collimator device of suit fixing and quarantine center.
Compare with existing optoisolator, the utlity model has following advantage: this optoisolator adopts the die casting lens to realize beam collimation, the die casting lens are by the mold pressing one-shot forming, the form accuracy height, it is convenient to make, cost is lower, and need not use poisonous chemical material in the manufacture process of die casting lens, helps operating personnel's physical and mental health and environmental protection.
[description of drawings]
Fig. 1 is the sectional view of the utility model optoisolator.
[embodiment]
Please join Fig. 1, optoisolator 100 of the present utility model comprises the first fiber optic collimator device 10, quarantine center 30 and the second fiber optic collimator device 20, and this optoisolator 100 also comprises an outer tube 40 that is used for suit fixing said modules.
The first fiber optic collimator device 10 comprises die casting lens 11, an optical fiber contact pins 12 and is fixed on optical fiber 13 in the optical fiber contact pins 12; this fiber optic collimator device 10 also comprises the fixing glass bushing 14 of die casting lens 11 and optical fiber contact pins 12; be connected with outer tube 40 for further protecting this first fiber optic collimator device 10 and being convenient to it, can adopt a metal sleeve 15 to be set on the glass bushing 14.
It is cylindric that optical fiber contact pins 12 roughly is, and can adopt pottery, metal or other material to make, and comprises that biend and runs through inner through hole 121.One end face of this optical fiber contact pins 12 (not indicating) is the plane, and through hole 121 forms a tapered opening (not indicating) near this place, plane, so that insert optical fiber 13, the other end is that the inclination angle is the dip plane 122 of 6 to 8 degree, and is coated with the counnter attack layer.Optical fiber 13 usefulness viscose glues are fixed in the optical fiber contact pins 12, and its end is concordant with dip plane 122.
It is cylindric that die casting lens 11 roughly are, and the refractive index that tool is constant can be used to collimate from the light beam of optical fiber 13 outputs or with directional light and assembles to optical fiber 13.For convergent beam, the end face 111 of die casting lens 11 is made aspheric surface; For increasing return loss, the dip plane 112 that the inclination angle is 6 to 8 degree is made in the other end.In addition, the biend 111,112 of die casting lens 11 all is coated with the counnter attack layer, to improve the whole optical property of fiber optic collimator device 10.
Die casting lens 11 can adopt materials such as glass or plastics one-body molded.When adopting glass material,, when adopting plastic material, generally pass through method manufacturings such as ejection formation, casting, hot-forming or ultraviolet light polymerization generally by compression molding.
When assembling the first fiber optic collimator device 10, at first smear epoxy glue, the through hole 121 that optical fiber inserts optical fiber contact pins 12 by tapered opening is also fixed at optical fiber 13 tail ends; Secondly optical fiber contact pins 12 and die casting lens 11 are inserted outer tubes 14, wherein, the dip plane 122 of the dip plane 112 adjacent fiber contact pins 12 of die casting lens 11 and being parallel to each other, its end face 111 stretches out outer tube 14; Sheathed metal sleeve 15 on outer tube 14; Optical fiber contact pins 12 keeps suitable spacing with die casting lens 11, and their relative position of adjustment guarantees that every optical property of fiber optic collimator device 10 reaches best; After fiber optic collimator device 10 is made in baking.
The second fiber optic collimator device 20 is identical with the first fiber optic collimator device, 10 structures.
It is cylindric that outer tube 40 roughly is, and its two end is equipped with a plurality of welding holes (not indicating) that are connected that are used for welding.
During assembling, magnet ring 34 is set in the part that die casting lens 11 stretch out outer tube 14; The first fiber optic collimator device 10 of the quarantine center 30 that is connected is inserted outer tube 40 from an end, and welding is fixing; Again the second fiber optic collimator device 20 is inserted outer tube 40 from the other end, the second fiber optic collimator device 20 is regulated in rotation, when the whole optical property for the treatment of optoisolator 100 reaches the best, weld at welding hole point scolder and to fix the second fiber optic collimator device 20, encapsulation at last.
During work, the first fiber optic collimator device 10 arrives quarantine center 30 by die casting lens 11 with beam convergence, first birefringece crystal 31 will be imported light and be separated into the mutually perpendicular two-beam in polarization direction, magneto-optical crystal 32 makes the polarization direction of two light beams rotate a special angle θ (as 45 degree) under the effect in magnet ring 34 magnetic field that produces, and the optical axis included angle of second birefringece crystal 33 and first birefringece crystal 31 also is special angle θ, thereby this two-beam is merged by second birefringece crystal 33, and converge to output optical fibre (not indicating) through the second fiber optic collimator device 20; Because the nonreciprocity of magneto-optical crystal 32, can't converge to input optical fibre 13 through quarantine center 30 from the return signal of output optical fibre, thereby realize the light isolation features.
Claims (10)
1. optoisolator, comprise: the first fiber optic collimator device, the quarantine center of the second fiber optic collimator device and between two fiber optic collimator devices, this quarantine center with the beam Propagation of first fiber optic collimator device output to the second fiber optic collimator device, and isolation is characterized in that from the Returning beam of the second fiber optic collimator device this optoisolator has at least a fiber optic collimator device to comprise the die casting lens of realizing beam collimation.
2. optoisolator as claimed in claim 1 is characterized in that further comprising an outer tube, this outer tube suit fixing first fiber optic collimator device, second fiber optic collimator device and the quarantine center.
3. optoisolator as claimed in claim 1 is characterized in that comprising that the fiber optic collimator device of die casting lens is first fiber optic collimator devices, and it comprises the optical fiber contact pins of a fixing optical fiber.
4. optoisolator as claimed in claim 1 it is characterized in that the die casting lens have constant refractive index, and an end face is an aspheric surface.
5. optoisolator as claimed in claim 4 is characterized in that the die casting lens other end relative with the aspheric surface end face is that the inclination angle is about the inclined-plane of 6 degree to 8 degree.
6. optoisolator as claimed in claim 5 it is characterized in that it is that the inclination angle is about the inclined-plane of 6 degree to 8 degree that optical fiber contact pins has an end face, and the adjacent face of this end face and die casting lens is parallel to each other.
7. optoisolator as claimed in claim 3 is characterized in that the biend of die casting lens all is coated with the counnter attack layer.
8. optoisolator as claimed in claim 3 is characterized in that the second fiber optic collimator device comprises that further one has the optical fiber contact pins and die casting lens of optical fiber.
9. optoisolator as claimed in claim 1 is characterized in that quarantine center comprises magneto-optical crystal and the magnet ring of two birefringece crystals, between two birefringece crystals, and this birefringece crystal and magneto-optical crystal are sleeved in the magnet ring.
10. optoisolator as claimed in claim 9, it is characterized in that the fiber optic collimator device that comprises the die casting lens also comprises the optical fiber contact pins of a fixing optical fiber and the glass bushing of a suit fixing optical fiber contact pins and die casting lens, this die casting lens component stretches out glass bushing, and magnet ring is enclosed within the extended portion of die casting lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02225446 CN2560972Y (en) | 2002-01-26 | 2002-01-26 | Optoisolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02225446 CN2560972Y (en) | 2002-01-26 | 2002-01-26 | Optoisolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2560972Y true CN2560972Y (en) | 2003-07-16 |
Family
ID=33702647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02225446 Expired - Fee Related CN2560972Y (en) | 2002-01-26 | 2002-01-26 | Optoisolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2560972Y (en) |
-
2002
- 2002-01-26 CN CN 02225446 patent/CN2560972Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |