Optical circulator
By using the groove-type substrate to fix the displacement sheet, half-wave plate, optical rotating sheet and wedge angle sheet in the ring core of the optical ring, the performance degradation caused by position error of the crystal device is solved and higher product performance is achieved.
Patent Information
- Application Number
- CN202421678137.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The position error of the crystal device in the halo ring causes the product performance to decline.
A light ring is designed, including a double-fiber collimator, annular core and a single-fiber collimator that is fixedly connected in sequence. The ring core is composed of a first glass tube, a magnetic ring and a groove-type substrate. Several grooves are provided on the groove-type substrate to fix the displacement sheet, a half-wave plate, an optical rotating sheet and a wedge-angle plate to ensure the position of the crystal device is fixed.
By fixing the position of the crystal device, the probability of position error is reduced, thereby improving the product performance of the halo circulator.
Smart Images
Figure CN222784591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical devices, in particular to an optical circulator. Background Art
[0002] Optical circulators are a key device in the field of fiber-optic communication and sensing. Their main function is to propagate optical signals along a specified port sequence. Conventional circulators are mostly three-port circulators. There are many crystal devices in an optical circulator. If there is an error in the position of one or more crystal devices, the product performance of the optical circulator will be degraded. Utility Model Content
[0003] In view of this, an object of the embodiments of the present utility model is to provide an optical circulator with good product performance.
[0004] The utility model provides an optical circulator, comprising a dual-fiber collimator, an annular core and a single-fiber collimator which are fixedly connected in sequence, wherein the annular core comprises a first glass tube, a magnetic ring and a groove-shaped substrate, wherein the groove-shaped substrate is arranged in the first glass tube, and a plurality of grooves are arranged on the groove-shaped substrate, wherein a first displacement plate, a second half-wave plate and a third half-wave plate, a fourth optical rotation plate, a fifth wedge plate, a sixth wedge plate, a seventh optical rotation plate, an eighth half-wave plate and a ninth half-wave plate, and a tenth displacement plate are sequentially installed in the grooves of the groove-shaped substrate, wherein the second half-wave plate and the third half-wave plate are in the same plane, and the eighth half-wave plate and the ninth half-wave plate are in the same plane, and the magnetic ring is arranged outside the first glass tube, and the magnetic ring covers the fourth optical rotation plate, the fifth wedge plate, the sixth wedge plate and the seventh optical rotation plate.
[0005] Optionally, the optical circulator further includes a second glass tube, and the second glass tube is fixedly connected to the dual-fiber collimator and the first glass tube.
[0006] Optionally, the optical circulator further includes a third glass tube, and the third glass tube is fixedly connected to the single-fiber collimator and the first glass tube.
[0007] Optionally, there is a first boundary gap between the second half-wave plate and the third half-wave plate, and the optical axis direction of the second half-wave plate and the optical axis direction of the third half-wave plate are symmetrical about the first boundary gap.
[0008] Optionally, there is a second boundary gap between the eighth half-wave plate and the ninth half-wave plate, and the optical axis direction of the eighth half-wave plate and the optical axis direction of the ninth half-wave plate are symmetrical about the second boundary gap.
[0009] Optionally, the first displacement plate and / or the tenth displacement plate comprises a birefringent crystal.
[0010] Optionally, the fifth wedge and / or the sixth wedge comprises a birefringent crystal.
[0011] Optionally, the material expansion coefficient of the trough-shaped substrate is within a preset range.
[0012] The implementation of the utility model embodiment includes the following beneficial effects: the optical circulator includes a dual-fiber collimator, an annular core and a single-fiber collimator which are fixedly connected in sequence, the annular core includes a first glass tube, a magnetic ring and a groove-shaped substrate, the groove-shaped substrate is arranged in the first glass tube, a plurality of grooves are arranged on the groove-shaped substrate, a first displacement plate, a second half-wave plate and a third half-wave plate, a fourth optical rotation plate, a fifth wedge plate, a sixth wedge plate, a seventh optical rotation plate, an eighth half-wave plate and a ninth half-wave plate, and a tenth displacement plate are installed in the groove of the groove of the groove substrate in sequence, wherein the second half-wave plate and the third half-wave plate are in the same plane, and the eighth half-wave plate and the ninth half-wave plate are in the same plane, the magnetic ring is arranged outside the first glass tube, and the magnetic ring covers the fourth optical rotation plate, the fifth wedge plate, the sixth wedge plate and the seventh optical rotation plate; the displacement plate, the half-wave plate, the optical rotation plate and the wedge plate are fixed by the groove of the groove-shaped substrate, so that the position of the crystal device in the optical circulator is fixed, and the probability of position error is reduced, so that the product performance of the optical circulator is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic structural diagram of a cross section of an optical circulator provided by an embodiment of the utility model;
[0014] Figure 2 It is a structural schematic diagram of a cross section of an annular core provided by an embodiment of the utility model;
[0015] Figure 3 It is a top view and a side view of a groove-type base plate provided by an embodiment of the utility model;
[0016] Figure 4 This is a light path diagram of an optical circulator provided by an embodiment of the utility model;
[0017] Figure 5 This is a light path diagram of another optical circulator provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] See also Figure 1 and Figure 2The utility model provides an optical circulator, comprising a dual-fiber collimator 1-1, an annular core and a single-fiber collimator 1-5 which are fixedly connected in sequence, the annular core comprising a first glass tube 1-2, a magnetic ring 1-3 and a groove-shaped substrate 1-4, the groove-shaped substrate 1-4 is arranged in the first glass tube 1-2, a plurality of grooves are arranged on the groove-shaped substrate 1-4, a first displacement plate 2-1, a second half-wave plate and a third half-wave plate 2-2, a fourth optical rotation plate are sequentially installed in the grooves of the groove-shaped substrate 1-4 2-3, a fifth wedge plate 2-4, a sixth wedge plate 2-5, a seventh optical rotation plate 2-6, an eighth half-wave plate and a ninth half-wave plate 2-7, and a tenth shift plate 2-8, wherein the second half-wave plate and the third half-wave plate 2-2 are in the same plane, the eighth half-wave plate and the ninth half-wave plate 2-7 are in the same plane, and the magnetic ring 1-3 is arranged outside the first glass tube 1-2, and the magnetic ring 1-3 covers the fourth optical rotation plate 2-3, the fifth wedge plate 2-4, the sixth wedge plate 2-5 and the seventh optical rotation plate 2-6.
[0020] Figure 1 In the figure, A1 represents the first optical fiber port of the optical circulator, A2 represents the second optical fiber port of the optical circulator, and A3 represents the third optical fiber port of the optical circulator. The incident light enters from the first optical fiber port A1 and exits from the second optical fiber port A2, or the incident light enters from the second optical fiber port A2 and exits from the third optical fiber port A3.
[0021] It should be noted that the positions of the grooves arranged on the groove substrate are determined according to the design of the optical circulator, and the sizes of the grooves are determined according to wave plate devices such as displacement plates, half-wave plates, optical rotation plates and wedge angle plates. The magnetic ring provides a magnetic field for the optical rotation unit, and the groove substrate serves as a carrier to support the entire ring core crystal element.
[0022] Optionally, the optical circulator further includes a second glass tube, and the second glass tube is fixedly connected to the dual-fiber collimator and the first glass tube.
[0023] It should be noted that the fixed connection method is determined according to the actual application, and this embodiment does not make any specific restrictions, such as bridging. Figure 1 The second glass tube 1-6 is bridged with the first glass tube 1-2 through the end faces of the glass tubes.
[0024] Optionally, the optical circulator further includes a third glass tube, and the third glass tube is fixedly connected to the single-fiber collimator and the first glass tube.
[0025] It should be noted that the fixed connection method is determined according to the actual application, and this embodiment does not make any specific restrictions, such as bridging. Figure 1 The second glass tube 1-7 is bridged with the first glass tube 1-2 through the end faces of the glass tubes.
[0026] Optionally, there is a first boundary gap between the second half-wave plate and the third half-wave plate, and the optical axis direction of the second half-wave plate and the optical axis direction of the third half-wave plate are symmetrical about the first boundary gap.
[0027] See also Figure 3 , Figure 3 (a) shows a top view of the grooved base plate. Figure 3 (b) shows a side view of the groove-shaped substrate, wherein there is a first junction gap between the second half-wave plate 2-2-1 and the third half-wave plate 2-2-2, and the optical axis direction of the second half-wave plate 2-2-1 and the optical axis direction of the third half-wave plate 2-2-2 are symmetrical about the first junction gap. The angle between the optical axis direction of the second half-wave plate 2-2-1 and the first junction gap or the angle between the optical axis direction of the third half-wave plate 2-2-2 and the first junction gap is determined according to actual application, and is not specifically limited in this embodiment, such as 22.5°.
[0028] Optionally, there is a second boundary gap between the eighth half-wave plate and the ninth half-wave plate, and the optical axis direction of the eighth half-wave plate and the optical axis direction of the ninth half-wave plate are symmetrical about the second boundary gap.
[0029] See also Figure 3 , there is a second junction gap between the eighth half-wave plate 2-7-1 and the ninth half-wave plate 2-7-2, and the optical axis direction of the eighth half-wave plate 2-7-1 and the optical axis direction of the ninth half-wave plate 2-7-2 are symmetrical about the second junction gap. The angle between the optical axis direction of the eighth half-wave plate 2-7-1 and the second junction gap or the angle between the optical axis direction of the ninth half-wave plate 2-7-2 and the second junction gap is determined according to actual application, and this embodiment does not make specific restrictions, such as 22.5°.
[0030] Optionally, the first displacement plate and / or the tenth displacement plate comprises a birefringent crystal.
[0031] Specifically, the first displacement plate and / or the tenth displacement plate include but are not limited to birefringent crystals.
[0032] Optionally, the fifth wedge and / or the sixth wedge comprises a birefringent crystal.
[0033] Specifically, the fifth wedge plate and / or the sixth wedge plate include but are not limited to birefringent crystals.
[0034] Optionally, the material expansion coefficient of the groove-shaped substrate is within a preset range.
[0035] It should be noted that the preset range is determined according to actual application and is not specifically limited in this embodiment. The smaller the material expansion coefficient of the slot-shaped substrate is, the less the slot-shaped substrate is affected by temperature changes, and the more stable the performance of the optical circulator is. The material of the slot-shaped substrate includes but is not limited to Kovar alloy or other metals with low expansion coefficients.
[0036] It should be noted that, see Figure 3 In (b), the cross-sectional curvature radius of the grooved substrate matches the inner diameter of the first glass tube, thereby improving stability.
[0037] In a specific embodiment, the working process of the optical circulator is as follows:
[0038] See also Figure 4 The first light is incident from the first fiber port A1 of the dual-fiber collimator, passes through the dual-fiber collimator, the first displacement plate, the second half-wave plate and the third half-wave plate, the fourth optical rotation plate, the fifth wedge plate, the sixth wedge plate, the seventh optical rotation plate, the eighth half-wave plate and the ninth half-wave plate, the tenth displacement plate, and the single-fiber collimator in sequence, and is emitted from the second fiber port A2.
[0039] See also Figure 5 The second light is incident from the second fiber port A2 of the single-fiber collimator, passes through the single-fiber collimator, the tenth displacement plate, the eighth half-wave plate and the ninth half-wave plate, the seventh optical rotation plate, the sixth wedge plate, the fifth wedge plate, the fourth optical rotation plate, the second half-wave plate and the third half-wave plate, the first displacement plate, and the dual-fiber collimator in sequence, and is emitted from the third fiber port A3 of the dual-fiber collimator.
[0040] The implementation of the utility model embodiment includes the following beneficial effects: the optical circulator includes a dual-fiber collimator, an annular core and a single-fiber collimator which are fixedly connected in sequence, the annular core includes a first glass tube, a magnetic ring and a groove-shaped substrate, the groove-shaped substrate is arranged in the first glass tube, a plurality of grooves are arranged on the groove-shaped substrate, a first displacement plate, a second half-wave plate and a third half-wave plate, a fourth optical rotation plate, a fifth wedge plate, a sixth wedge plate, a seventh optical rotation plate, an eighth half-wave plate and a ninth half-wave plate, and a tenth displacement plate are installed in the groove of the groove of the groove substrate in sequence, wherein the second half-wave plate and the third half-wave plate are in the same plane, and the eighth half-wave plate and the ninth half-wave plate are in the same plane, the magnetic ring is arranged outside the first glass tube, and the magnetic ring covers the fourth optical rotation plate, the fifth wedge plate, the sixth wedge plate and the seventh optical rotation plate; the displacement plate, the half-wave plate, the optical rotation plate and the wedge plate are fixed by the groove of the groove-shaped substrate, so that the position of the crystal device in the optical circulator is fixed, and the probability of position error is reduced, so that the product performance of the optical circulator is good.
[0041] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. An optical circulator, characterized in that: The invention comprises a dual-fiber collimator, an annular core and a single-fiber collimator which are fixedly connected in sequence. The annular core comprises a first glass tube, a magnetic ring and a groove-shaped substrate. The groove-shaped substrate is arranged in the first glass tube. A plurality of grooves are arranged on the groove-shaped substrate. A first displacement plate, a second half-wave plate, a third half-wave plate, a fourth optical rotation plate, a fifth wedge plate, a sixth wedge plate, a seventh optical rotation plate, an eighth half-wave plate, a ninth half-wave plate and a tenth displacement plate are arranged in sequence in the grooves of the groove-shaped substrate. The second half-wave plate and the third half-wave plate are in the same plane, and the eighth half-wave plate and the ninth half-wave plate are in the same plane. The magnetic ring is arranged outside the first glass tube, and the magnetic ring covers the fourth optical rotation plate, the fifth wedge plate, the sixth wedge plate and the seventh optical rotation plate.
2. The optical circulator according to claim 1, characterized in that: The optical circulator further includes a second glass tube, and the second glass tube is fixedly connected to the dual-fiber collimator and the first glass tube.
3. The optical circulator according to claim 1, characterized in that: The optical circulator further includes a third glass tube, and the third glass tube is fixedly connected to the single-fiber collimator and the first glass tube.
4. The optical circulator according to claim 1, characterized in that: There is a first boundary gap between the second half-wave plate and the third half-wave plate, and the optical axis direction of the second half-wave plate and the optical axis direction of the third half-wave plate are symmetrical about the first boundary gap.
5. The optical circulator according to claim 1, characterized in that: There is a second boundary gap between the eighth half-wave plate and the ninth half-wave plate, and the optical axis direction of the eighth half-wave plate and the optical axis direction of the ninth half-wave plate are symmetrical about the second boundary gap.
6. The optical circulator according to claim 1, characterized in that: The first displacement plate and / or the tenth displacement plate include a birefringent crystal.
7. The optical circulator according to claim 1, characterized in that: The fifth wedge and / or the sixth wedge include a birefringent crystal.
8. The optical circulator according to claim 1, characterized in that: The material expansion coefficient of the groove-shaped substrate is within a preset range.