Optical isolator based on air cooling heat dissipation
By employing a wind-cooled heat dissipation design, heat is dissipated to the heat sink using a heat-conducting fan and lens assembly, thus solving the problem of poor heat dissipation in high-power optical isolators and improving the stability and safety of the laser system.
Patent Information
- Application Number
- CN202520356143.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing high-power optical isolators have poor heat dissipation, resulting in high insertion loss and affecting the stable operation and safety of laser systems.
It adopts an air-cooled heat dissipation design, which uses a heat-conducting fan and heat dissipation module, and a lens group to dissipate heat to the heat sink, thus achieving effective heat dissipation.
This improves the heat dissipation efficiency of the optical isolator, reduces insertion loss, and ensures the stable operation and safety of the laser system.
Smart Images
Figure CN223756935U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical isolator technical field especially relates to a kind of optical isolators based on air cooling heat dissipation. BACKGROUND
[0002] High-power laser system is very sensitive to abnormal entering light, if the light returned to high-power laser system is strong, it will affect the stable operation of high-power laser system, and more seriously, it will damage the whole laser system, so light isolator is added in laser system, so that light can only pass through in positive direction, and the reverse return light is filtered out. Optical isolator is a passive optical device that allows unidirectional light to pass through, and its working principle is based on the non-reciprocity of Faraday rotation. The light reflected by the optical fiber echo can be well isolated by the optical isolator. Optical isolator mainly utilizes the Faraday effect of magneto-optical crystal.
[0003] At present, most of the optical isolators used in China are small-power optical isolators, usually between a few watts and tens of watts, and there are few optical isolators above hundreds of watts. Because once involving high power, it is easy to have large insertion loss and poor heat dissipation effect due to technical reasons. In view of this, the technical personnel in the field designed an optical isolator based on air cooling heat dissipation. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and to provide an optical isolator based on air cooling heat dissipation, which facilitates effective heat dissipation of the optical isolator during use.
[0005] The technical scheme of the utility model is as follows: an optical isolator based on air cooling heat dissipation, comprising an isolator body, the isolator body comprising a packaging shell, a first optical fiber collimator, a first PBS beam splitter, a rotatory device, a rotatory piece group, a second PBS beam splitter and a second optical fiber collimator arranged in the packaging shell in sequence along the light propagation direction, the first PBS beam splitter and the second PBS beam splitter each comprising two parallel arranged polarization films, the rotatory piece group comprising a first rotatory piece and a second rotatory piece arranged in parallel, the packaging shell is provided with a heat dissipation module above the isolator body, the heat dissipation module comprising a lens group, a heat dissipation block and a heat conduction fan, the lens group comprising a first concave lens arranged above the first PBS beam splitter and a second concave lens arranged above the second PBS beam splitter, the heat dissipation block is arranged between the heat conduction fan and the lens group, and the heat conduction fan is communicated with the packaging shell.
[0006] From the above scheme can be known that the first PBS beam splitter is used for light splitting, the optical device and the optical rotatory piece group are used for rotating the light path, the second PBS beam splitter is used for light combination, the light isolator body is used for limiting the direction of the laser, so that the laser can only be transmitted to the next optical path element in a single direction, the heat dissipation module is used for dissipating heat to the heat dissipation block through the lens group, and the heat conduction fan is used for air exchange to dissipate heat of the heat dissipation block, so that the heat dissipation of the isolator body is realized.
[0007] The optical rotatory piece is quartz optical rotatory piece. Therefore, the optical rotatory piece is used for rotating the light.
[0008] The first concave lens piece and the second concave lens piece are both double concave lens pieces. Therefore, the double concave lens pieces are used for diverging the split light outward.
[0009] The heat conduction fan is provided with two.
[0010] The isolator body is provided with a beam expander at the receiving end of the light propagation. Therefore, the beam expander is used for expanding the laser beam. BRIEF DESCRIPTION OF DRAWINGS
[0011] Fig. 1 is a schematic view of the internal structure of the utility model;
[0012] Fig. 2 is a schematic view of the structure of another embodiment of the utility model;
[0013] Fig. 3 is a schematic view of the structure of the utility model. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.
[0015] As Figs. 1 to 3The utility model discloses a kind of optical isolators based on air cooling heat dissipation, including isolator body, the isolator body includes package shell 1, first optical fiber collimator 2, first PBS beam splitter 3, optical rotation device 4, optical rotation piece group, second PBS beam splitter 5 and second optical fiber collimator 6 sequentially arranged in package shell 1 along light propagation direction, first PBS beam splitter 3 and second PBS beam splitter 5 all include two parallelly arranged polaroid 31, the optical rotation piece group includes two parallelly arranged optical rotation pieces 7, package shell 1 is provided with heat dissipation module above the isolator body, the heat dissipation module includes lens group, heat dissipation block 9 and heat conduction fan 10, the lens group includes first concave lens 11 horizontally arranged above first PBS beam splitter 3 and second concave lens 12 horizontally arranged above second PBS beam splitter 5, heat conduction fan 10 is arranged above the lens group, heat dissipation block 9 is arranged between heat conduction fan 10 and the lens group, heat conduction fan 10 is provided with two, and heat conduction fan 10 is communicated with package shell 1.
[0016] In the embodiment, the first optical fiber collimator and the second optical fiber collimator use optical fiber and lens integration, play the beam expanding effect on light, the optical rotation device 4 is used for changing the propagation direction of light when the polarized light passes, the optical fiber end face is directly connected on the lens by hot melting, the optical energy density of the optical fiber end face can be reduced, the laser damage threshold can be obviously improved, and the long-term reliability can be improved. The first optical rotation piece 7 and the second optical rotation piece 8 are respectively arranged corresponding to the two polaroid 31.
[0017] The optical rotation piece 7 adopts quartz optical rotation piece. In the embodiment, the optical rotation piece 7 includes two pieces of quartz optical rotation piece arranged in parallel.
[0018] The first concave lens 11 and the second concave lens 12 all adopt double-concave lens.
[0019] In another embodiment of the utility model, the isolator body includes package shell 1, first optical fiber collimator 2, first PBS beam splitter 3, optical rotation device 4, optical rotation piece group and second PBS beam splitter 5 sequentially arranged in package shell 1 along light propagation direction, the isolator body is provided with beam expanding device at the receiving end of light propagation, the beam expanding device is correspondingly arranged at the back side of one of the polaroid of second PBS beam splitter, and the beam expanding device includes objective lens 13 and imaging lens 14 arranged behind the objective lens 13, realizes the beam expanding of light beam, and improves the collimation performance of laser.
[0020] The working process of the utility model is: signal light is shot into the isolator body through the first optical fiber collimator 2, the first PBS beam splitter 3 divides the incident light, the incident light is divided into the first light beam parallel to the incident light and the second light beam vertical to the incident light by the first polarizing film 31 of the first PBS beam splitter 3, the second light beam is reflected by the second polarizing film 31 of the first PBS beam splitter 3, the propagation direction is parallel to the incident light and the first light beam, the first light beam and the second light beam enter the two polarizing films 31 in the second PBS beam splitter 5 after the rotatory device 4 and the rotatory piece group, and are combined into a light beam after reflection, and then are output through the second optical fiber collimator 6, so that the unidirectional passing of light is realized.When the first PBS beam splitter 3 divides the light, the excess light is dispersed to the heat sink 9 through the first concave lens piece 11, and the heat sink 9 is cooled by the heat conduction fan 10, when the second PBS beam splitter 5 combines the light, the excess light is dispersed to the heat sink 9 through the second concave lens piece 12, and the heat sink 9 is cooled by the heat conduction fan 10, so that the cooling of the isolator body is realized.
[0021] Finally, it needs to be emphasized that the above description is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.
Claims
1. A wind cooling-based optical isolator, comprising an isolator body, characterized in that: The isolator body comprises an encapsulation shell (1), a first optical fiber collimator (2), a first PBS beam splitter (3), a rotary polarization device (4), a rotary polarization piece group, a second PBS beam splitter (5) and a second optical fiber collimator (6) which are sequentially arranged in the optical propagation direction in the encapsulation shell (1), the first PBS beam splitter (3) and the second PBS beam splitter (5) each comprise two parallel arranged polarization films (31), the rotary polarization piece group comprises two parallel arranged rotary polarization pieces (7), the encapsulation shell (1) is provided with a heat dissipation module above the isolator body, the heat dissipation module comprises a lens group, a heat dissipation block (9) and a heat conduction fan (10), the lens group comprises a first concave lens (11) horizontally arranged above the first PBS beam splitter (3) and a second concave lens (12) horizontally arranged above the second PBS beam splitter (5), the heat dissipation block (9) is arranged between the heat conduction fan (10) and the lens group, and the heat conduction fan (10) is communicated with the encapsulation shell (1).
2. The optical isolator based on air cooling according to claim 1, characterized in that: The rotary polarization piece (7) is a quartz rotary polarization piece.
3. The optical isolator based on air cooling according to claim 1, characterized in that: The first concave lens (11) and the second concave lens (12) are both double-concave lenses.
4. The optical isolator based on air cooling according to claim 1, characterized in that: The heat conduction fan (10) is provided with two.
5. The optical isolator based on air cooling according to claim 1, characterized in that: The isolator body is provided with a beam expander at a receiving end of optical propagation.