Integrated circulator for light beam chip
By designing an integrated Circle for beam chips, the devices and optical paths of the optical Circle are optimized, and the light in and out of the chip is shared, the additional loss and coupling difficulty caused by the optical Circle in the existing coaxial beam transceiver system is solved, and the cost and process difficulty are reduced.
Patent Information
- Application Number
- CN202422259609.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The problem of the light circulator needs to be dealt with in existing coaxial beam transceiver systems, resulting in increased additional losses and coupling difficulties.
Design an integrated Circle for a beam chip. By optimizing the device and optical path of the optical Circle, the light entering and exiting the chip can directly share an optical coupling, reducing the coupling port, thereby reducing cost and process difficulty.
By optimizing the design of the light circulator, the sharing of light in and out of the chip is achieved, reducing coupling ports, reducing cost and process difficulty, and reducing device volume.
Smart Images
Figure CN223038211U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of optical elements, and particularly relates to an integrated circulator for a beam chip. Background Art
[0002] Spatial light transceivers based on photonic chips have many applications, such as lidar, spatial light communication fields, etc. Currently, there are mainly two methods in the used transceiver systems: one is a non-coaxial transceiver system where the transmitting and receiving optical paths are not on the same axis; the other is a coaxial system where the transmitting and receiving optical paths coincide, that is, they use the same axis.
[0003] The non-coaxial transceiver system can reduce the influence of excessive near-distance echo signals on the detector and can achieve a larger field of view and higher resolution. In practical applications, the non-coaxial system needs to ensure the precise alignment of the transmitting and receiving optical paths to achieve high detection efficiency. The alignment optical path is complex, occupies a large space, and is not conducive to integration; the alignment and debugging of the optical path are complex and time-consuming, and have high requirements for the technical level and experience of the staff.
[0004] The coaxial transceiver system is easy to adjust, has high precision and miniaturization, has a simple structure, is convenient to achieve the coaxial alignment of the optical path, and has higher reliability and lower maintenance cost; however, the problem of the optical circulator needs to be addressed in the coaxial transceiver system (if a 2*2 optical splitter is used, there is at least 6db of additional loss for round-trip). There are two common types of optical circulators: the circulator based on the traveling wave method has a small bandwidth and high insertion loss, and its application is limited; when the optical circulator based on the discrete Faraday slice - polarization beam splitter system is docked with a photonic chip, usually two beam coupling ports are required, corresponding to the emitted signal and the returned signal respectively, which is equivalent to an additional micro spatial light coupling outside the chip input coupling port, resulting in an increase in coupling difficulty.
[0005] Based on the above analysis, this patent proposes an integrated circulator, which realizes that the light entering and leaving the chip can directly share one optical coupling by optimizing the device and optical path of the optical circulator, reduces the coupling ports, thereby reducing the cost and process difficulty. Summary of the Utility Model
[0006] The purpose of the utility model is to propose an integrated circulator for a beam chip in view of the deficiencies of the prior art.
[0007] The purpose of the utility model is achieved by the following technical solutions: an integrated circulator for a beam chip, the device includes: an input optical collimation component, a beam splitting and reflecting component, a non-reciprocal optical rotation component, and an optical chip component, where:
[0008] The input optical collimation component includes an optical fiber and a collimator. The optical signal in the optical fiber is collimated by the collimator to form a Gaussian beam and then input into the beam splitting and reflecting component. The beam waist radius of the beam in the optical fiber is set near the optical chip coupling port.
[0009] The beam splitting and reflecting component includes a PBS prism and a reflecting mirror surface, which is used for directly transmitting the optical signal of a specific polarization state, and reflecting the optical signal of another polarization state and returning it along the original path through optical path folding. The transmitted beam is input into the non-reciprocal optical rotation component.
[0010] The non-reciprocal optical rotation component includes a wave plate and a Faraday plate, which is used for the polarization state of the optical signal passing through in one direction to remain unchanged, and the polarization state of the optical signal passing through in the opposite direction to rotate 90 degrees relative to that before passing through.
[0011] The optical chip component includes a coupling port, a detector, and a polarization beam splitting and rotating device. The coupling port receives the polarized light input from the non-reciprocal optical rotation component and the polarized light returned from inside the chip. The polarized light input from the non-reciprocal optical rotation component is transmitted into the optical chip through the polarization beam splitting and rotating device and then enters the space, or rotates the polarization state of the polarized light returning from the space and changes its direction and inputs it into the detector for processing.
[0012] Further, the collimator is a C-LENS, a G-LENS, or a spherical lens.
[0013] Further, the beam splitting and reflecting component includes a PBS prism and a reflecting mirror surface. The reflected light passing through the PBS prism is emitted through the light output surface of the prism, and a reflecting mirror surface is arranged outside the light output surface, and the reflecting mirror surface is perpendicular to the reflected light.
[0014] Further, the reflecting mirror surface is set to directly coat a high-reflection film on the light output surface of the prism, or is set to a reflecting lens attached to the light output surface of the prism or a separately fixed reflecting lens.
[0015] Further, the PBS prism is a rectangular prism composed of two isosceles right triangle prisms, and there is a multi-layer dielectric film in the middle.
[0016] Further, in the non-reciprocal optical rotation component, the polarization state of the optical signal passing through in one direction remains unchanged, and the polarization state of the optical signal passing through in the opposite direction rotates 90 degrees relative to that before passing through, which is realized by setting the angle of the polarization direction of the half-wave plate and the rotation direction of the linear polarization direction of the Faraday rotator.
[0017] The Faraday rotator is a Faraday rotator that rotates the linear polarization direction clockwise or counterclockwise by 45 degrees, and the angle between the optical axis of the half-wave plate and the polarization direction of the first polarized light is ±22.5 degrees or ±67.5 degrees.
[0018] Further, an anti-reflection film is coated on the light input surface and the light output surface of the collimator, the PBS prism, the half-wave plate, and the Faraday rotator.
[0019] Furthermore, the polarization beam splitting rotator is configured to allow a light signal of one polarization state to pass directly along the original path without being changed, and rotate the polarization state of a light signal of another polarization state that is 90 degrees thereto by 90 degrees and change the transmission direction, and transmit it along a direction forming an angle with the original path direction.
[0020] Advantages of the present utility model: By optimizing the beam splitting and reflecting assembly outside the chip, it is possible to share a common optical path for the light entering and exiting the chip; through the beam splitting assembly and the non-reciprocal optical rotation assembly, it is possible to divide the light entering and exiting the common optical path into two different polarization state signal lights to prevent interference with each other. Furthermore, the two lights can directly share a single optical coupling, reducing the coupling ports on the optical chip, thereby reducing costs and process difficulties. At the same time, the device volume can be reduced and costs can be lowered. Description of the Drawings
[0021] Figure 1 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 1;
[0022] Figure 2 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 2;
[0023] Figure 3 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 3;
[0024] Figure 4 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 4;
[0025] Figure 5 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 5;
[0026] Figure 6 Schematic diagram of the optical path and structure of an integrated circulator for a beam chip provided in Embodiment 6.
[0027] In the figure, 1 is the input light collimation assembly, 11 is the optical fiber, and 12 is the collimator; 2 is the beam splitting and reflecting assembly, 21 is the PBS prism, and 22 is the reflecting mirror surface (HR film or reflecting lens); 3 is the non-reciprocal optical rotation assembly, 31 is the half-wave plate, and 32 is the Faraday rotator; 4 is the optical chip assembly, and 41 is the coupling port. Detailed Embodiments
[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.
[0029] Embodiment 1:
[0030] As Figure 1 shown, an integrated circulator for a beam chip provided by the present utility model includes an input optical collimation component 1, a beam splitting and reflecting component 2, a non-reciprocal optical rotation component 3, and an optical chip component 4; the input optical collimation component 1 includes an optical fiber 11 and a collimator 12; the beam splitting and reflecting component 2 includes a PBS prism 21 and a reflecting mirror 22; the non-reciprocal optical rotation component 3 includes a wave plate and a Faraday plate;
[0031] The optical chip component 4 at least includes a coupling port 41, a detector, and a polarization beam splitter-rotator (PSR for short);
[0032] In the input optical collimation component, the optical signal in the optical fiber 11 forms a Gaussian beam after passing through the collimator 12, and the beam waist radius is located on the optical chip coupling port 41; the collimator 12 can be a micro-optical element such as a C-LENS, G-LENS, or spherical lens;
[0033] The beam splitting and reflecting component 2 can enable a light signal with a specific polarization state to be directly transmitted, and a light signal with another polarization state to be reflected and return along the original path through optical path folding;
[0034] The non-reciprocal optical rotation component 3 can enable the polarization state of the light signal passing through in the forward direction to remain unchanged, and the polarization state of the light signal passing through in the reverse direction to rotate 90 degrees relative to that before passing through; or vice versa;
[0035] The optical chip component 4 can output the optical signal into space and receive the returned optical signal; realize the rotation of the polarization state of the optical signal and split the optical signal according to the polarization state; and realize the reception and processing of the optical signal through the Detector.
[0036] The non-reciprocal optical rotation component 3 includes a half-wave plate 31 and a 45-degree Faraday rotator 32; the angle between the optical axis of the half-wave plate 31 and the polarization direction of the first polarized light input by the optical fiber is ±22.5 degrees or ±67.5 degrees (both the reverse and forward directions here and below are viewed from the light incident direction, and the included angle is positive in the counterclockwise direction);
[0037] The PBS prism 21 is a rectangular prism composed of two isosceles right - angled triangular prisms, with multiple dielectric thin films in the middle;
[0038] The reflected light passing through the PBS prism 21 exits perpendicular to the light - exiting surface of the prism. A reflecting mirror 22 is arranged outside the light - exiting surface. The reflecting mirror 22 is parallel to the light - exiting surface of the prism (also perpendicular to the reflected light). The reflecting mirror is preferably set as a high - reflection film (HR film) directly plated on the light - exiting surface of the prism;
[0039] Optionally, the reflected light passing through the PBS prism 21 may not exit perpendicular to the light - exiting surface of the prism, but the reflecting mirror 22 outside the light - exiting surface needs to be perpendicular to the reflected light;
[0040] Optionally, antireflection films (AR films) are plated on the light - incident surfaces and light - exiting surfaces of the collimator 12, PBS prism 21, half - wave plate 31, and Faraday rotator 32 to improve the light transmittance and reduce the reflectance;
[0041] There is exactly one coupling port 41 on the optical chip component 4 that can simultaneously couple the polarized light passing through the non - reciprocal polarization rotation component 3 into the chip or collimate the polarized light returned from inside the chip and then enter the non - reciprocal polarization rotation component 3;
[0042] On the optical chip component 4, the PSR can be set to allow a light signal of one polarization state to pass directly along the original path without change, and to rotate the polarization state of a light signal of another polarization state that is 90 degrees different from it by 90 degrees and change the transmission direction, and transmit it along a direction forming a certain angle with the original path direction.
[0043] To ensure that the polarization state of the light signal passing through in the forward direction remains unchanged and the polarization state of the light signal passing through in the reverse direction rotates 90 degrees relative to that before passing through, the non - reciprocal polarization rotation component 3, from the input light direction, is in sequence:
[0044] A half - wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being 22.5 degrees; a Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees;
[0045] Or,
[0046] A half - wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being - 22.5 degrees; a Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees;
[0047] Or,
[0048] A half - wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being 67.5 degrees; a Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees;
[0049] Or,
[0050] A half-wave plate 31 with an angle of -67.5 degrees between the optical axis direction and the polarization direction of the first polarized light; A Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees;
[0051] As Figure 1 shown, the specific optical path is as follows: One way of optical signal transmission is that the first polarized light is input from the input optical fiber, collimated by the collimator 12 and then passes through the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41, the PSR in sequence and is transmitted from the optical chip into space. The polarization state remains unchanged during this process; The second polarized light returned in space passes through the optical chip and the optical chip coupling port 41 to the non-reciprocal optical rotation component 3 in sequence. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the second polarized light to become the third polarized light; The third polarized light is reflected at the PBS prism 21 to the reflecting mirror 22 and then passes through the PBS prism 21 reflection, the non-reciprocal optical rotation component 3, the optical chip coupling port 41 to the PSR along the original path in sequence. At the PSR, the polarization state rotates 90 degrees relative to the third polarized light and is reflected to change the direction to become the fourth polarized light. Finally, the fourth polarized light enters the Detector for processing; Among them, the first polarized light, the second polarized light, and the fourth polarized light are P lights, and the third polarized light is an S light.
[0052] Embodiment 2:
[0053] As Figure 2 shown, the specific optical path is as follows: One way of optical signal transmission is that the first polarized light is input from the input optical fiber 11, collimated by the collimator 12 and then passes through the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41, the PSR in sequence and is transmitted from the optical chip into space. The polarization state remains unchanged during this process; The second polarized light returned in space passes through the optical chip and the optical chip coupling port 41 to the non-reciprocal optical rotation component 3 in sequence. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the second polarized light to become the third polarized light; The third polarized light is reflected at the PBS prism 21 to the reflecting mirror 22 and then passes through the PBS prism 21 reflection, the non-reciprocal optical rotation component 3, the optical chip coupling port 41 to the PSR along the original path in sequence. At the PSR, the polarization state rotates 90 degrees relative to the third polarized light and is reflected to change the direction to become the fourth polarized light. Finally, the fourth polarized light enters the Detector for processing;
[0054] The difference from Embodiment 1 is that the reflecting mirror 22 is a reflecting lens attached to the light-emitting surface of the prism.
[0055] Embodiment 3:
[0056] As Figure 3As shown in the figure, the specific optical path is as follows: One way of optical signal transmission is to input the first polarized light from the input optical fiber 11. After being collimated by the collimator 12, it passes through the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41, the PSR in sequence and is transmitted into space from the optical chip. During this process, the polarization state remains unchanged. The second polarized light returned in space passes through the optical chip, the optical chip coupling port 41 to the non-reciprocal optical rotation component 3 in sequence. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the second polarized light to become the third polarized light. The third polarized light is reflected at the PBS prism 21 to the reflecting mirror 22 and then passes through the PBS prism 21 reflection, the non-reciprocal optical rotation component 3, the optical chip coupling port 41 to the PSR along the original path in sequence. At the PSR, the polarization state rotates 90 degrees relative to the third polarized light and is reflected to change the direction to become the fourth polarized light. Finally, the fourth polarized light enters the Detector for processing;
[0057] The difference from Embodiment 1 is:
[0058] The non-reciprocal optical rotation component 3, viewed from the input light direction, is in sequence: a Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees; a half-wave plate 31 with the optical axis direction at an angle of -22.5 degrees to the polarization direction of the first polarized light;
[0059] Or,
[0060] a Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees; a half-wave plate 31 with the optical axis direction at an angle of 67.5 degrees to the polarization direction of the first polarized light;
[0061] Or,
[0062] a Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees; a half-wave plate 31 with the optical axis direction at an angle of 22.5 degrees to the polarization direction of the first polarized light;
[0063] Or,
[0064] a Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees; a half-wave plate 31 with the optical axis direction at an angle of -67.5 degrees to the polarization direction of the first polarized light.
[0065] Embodiment 4:
[0066] As Figure 4As shown in the figure, the specific optical path is as follows: Another way of optical signal transmission is to input the first polarized light from the input optical fiber 11. After being collimated by the collimator 12, it passes through the PBS prism 21 to the non-reciprocal optical rotation component 3. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the first polarized light to become the second polarized light. The second polarized light then passes through the optical chip coupling port 41, PSR in sequence and is transmitted into space from the optical chip; The third polarized light returned in space passes through the optical chip, optical chip coupling port 41, non-reciprocal optical rotation component 3 in sequence, is reflected at the PBS prism 21 to the reflecting mirror 22 and then passes through the PBS prism 21 again along the original path and is reflected to the non-reciprocal optical rotation component 3. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the third polarized light to become the fourth polarized light. The fourth polarized light passes through the optical chip coupling port 41 to the PSR, and at the PSR, the polarization state rotates 90 degrees relative to the fourth polarized light and is reflected to change the direction to become the fifth polarized light. Finally, the fifth polarized light enters the Detector for processing;
[0067] To make the polarization state of the forward-passing optical signal rotate 90 degrees relative to that before passing through, and the polarization state of the backward-passing optical signal remain unchanged, the non-reciprocal optical rotation component 3, seen from the input light direction, is in sequence:
[0068] A half-wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being 22.5 degrees; A Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees;
[0069] Or,
[0070] A half-wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being -22.5 degrees; A Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees;
[0071] Or,
[0072] A half-wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being 67.5 degrees; A Faraday rotator 32 that can rotate the linear polarization direction clockwise by 45 degrees;
[0073] Or,
[0074] A half-wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being -67.5 degrees; A Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees;
[0075] Similarly, it also includes: A Faraday rotator 32 that can rotate the linear polarization direction counterclockwise by 45 degrees; A half-wave plate 31 with the angle between the optical axis direction and the polarization direction of the first polarized light being -22.5 degrees;
[0076] Or,
[0077] A Faraday rotator 32 that can rotate the linearly polarized direction counterclockwise by 45 degrees; A half-wave plate 31 with an optical axis direction at an angle of 67.5 degrees to the polarization direction of the first polarized light;
[0078] Or,
[0079] A Faraday rotator 32 that can rotate the linearly polarized direction clockwise by 45 degrees; A half-wave plate 31 with an optical axis direction at an angle of 22.5 degrees to the polarization direction of the first polarized light;
[0080] Or,
[0081] A Faraday rotator 32 that can rotate the linearly polarized direction clockwise by 45 degrees; A half-wave plate 31 with an optical axis direction at an angle of -67.5 degrees to the polarization direction of the first polarized light.
[0082] Example 5:
[0083] As Figure 5 shown, the specific optical path is as follows: One way of optical signal transmission is to input the first polarized light from the input optical fiber 11, collimate it through the collimator 12 and then sequentially pass through the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41, the PSR and transmit it into the space from the optical chip. The polarization state remains unchanged during this process; The second polarized light returned in the space sequentially passes through the optical chip, the optical chip coupling port 41 to the non-reciprocal optical rotation component 3. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the second polarized light to become the third polarized light; The third polarized light is reflected at the PBS prism 21 to the reflecting mirror 22 and then sequentially passes through the reflection of the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41 to the PSR along the original path. At the PSR, the polarization state rotates 90 degrees relative to the third polarized light and is reflected to change the direction to become the fourth polarized light. Finally, the fourth polarized light enters the Detector for processing;
[0084] Different from Example 1: In this example, the polarization state of the first polarized light is changed. Therefore, the first polarized light, the second polarized light, and the fourth polarized light are S lights, and the third polarized light is a P light.
[0085] Example 6:
[0086] As Figure 6As shown in the figure, the specific optical path is as follows: One way of optical signal transmission is to input the first polarized light from the input optical fiber 11. After being collimated by the collimator 12, it passes through the PBS prism 21, the non-reciprocal optical rotation component 3, the optical chip coupling port 41, the PSR in sequence and is transmitted into the space from the optical chip. During this process, the polarization state remains unchanged. The second polarized light returned from the space passes through the optical chip and the optical chip coupling port 41 to the non-reciprocal optical rotation component 3 in sequence. After passing through the non-reciprocal optical rotation component 3, the polarization state rotates 90 degrees relative to the second polarized light to become the third polarized light. The third polarized light is reflected at the PBS prism 21 to the reflecting mirror 22 and then passes through the PBS prism 21 reflection, the non-reciprocal optical rotation component 3, the optical chip coupling port 41 to the PSR along the original path in sequence. At the PSR, the polarization state rotates 90 degrees relative to the third polarized light and is reflected to change the direction to become the fourth polarized light. Finally, the fourth polarized light enters the Detector for processing;
[0087] Different from Embodiment 1: In this embodiment, the reflecting mirror bonded to the PBS prism 21 is replaced with a separately fixed reflecting lens.
[0088] The above embodiments are used to explain the present invention, rather than limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the protection of the claims of the present invention fall within the protection scope of the present invention.
Claims
1. An integrated circulator for a beam chip, characterized in that: include: Input light collimation component, light beam splitting and reflection component, non-reciprocal optical rotation component and optical chip component, wherein: The input light collimation component includes an optical fiber and a collimator. The optical signal in the optical fiber passes through the collimator to form a Gaussian beam which is input into the beam splitting and reflecting component. The beam waist radius in the optical fiber is located on the coupling port of the optical chip. The beam splitting and reflecting component comprises a PBS prism and a reflecting mirror, which is used for directly transmitting a light signal in a specific polarization state, reflecting a light signal in another polarization state and returning to the original path through folding the optical path, and the transmitted light beam is input into the non-reciprocal optical rotation component; The non-reciprocal optical rotation component comprises a wave plate and a Faraday plate, which is used to keep the polarization state of the optical signal passing in one direction unchanged, and rotate the polarization state of the optical signal passing in the opposite direction by 90 degrees relative to the state before passing; The optical chip component includes a coupling port, a detector and a polarization beam splitter rotator. The coupling port receives polarized light input by the non-reciprocal optical rotation component and polarized light transmitted back from the chip. The polarized light input by the non-reciprocal optical rotation component is transmitted into the optical chip through the polarization beam splitter rotator and then enters the space, or the polarized light returned from the space is rotated and reflected to change the direction and input into the detector for processing.
2. The integrated circulator for a beam chip according to claim 1, characterized in that: The collimator is a C-LENS, a G-LENS or a ball lens.
3. The integrated circulator for a beam chip according to claim 1, characterized in that: The beam splitting and reflecting component comprises a PBS prism and a reflecting mirror. The reflected light passing through the PBS prism is emitted through the light-emitting surface of the prism. A reflecting mirror is arranged outside the light-emitting surface and is perpendicular to the reflected light.
4. The integrated circulator for a beam chip according to claim 3, characterized in that: The reflective mirror surface is configured by directly coating a high-reflective film on the light-emitting surface of the prism, or is configured by a reflective lens attached to the light-emitting surface of the prism or a separately fixed reflective lens.
5. The integrated circulator for a beam chip according to claim 3, characterized in that: The PBS prism is a rectangular prism composed of two isosceles right-angled triangle prisms, with a multi-layer dielectric film in the middle.
6. The integrated circulator for a beam chip according to claim 1, characterized in that: In the non-reciprocal optical rotation component, the polarization state of the optical signal passing in one direction remains unchanged, while the polarization state of the optical signal passing in the other opposite direction is rotated 90 degrees relative to the state before passing, which is achieved by setting the angle of the polarization direction of the half-wave plate light and the rotation direction of the linear polarization direction of the Faraday rotator. The Faraday rotator is a Faraday rotator that rotates the linear polarization direction clockwise or counterclockwise by 45 degrees, and the angle between the optical axis of the half-wave plate and the polarization direction of the polarized light input by the optical fiber is ±22.5 degrees or ±67.5 degrees.
7. The integrated circulator for a beam chip according to claim 1, characterized in that: The light-incoming and light-outgoing surfaces of the collimator, PBS prism, half-wave plate and Faraday rotator are coated with anti-reflection films.
8. The integrated circulator for a beam chip according to claim 1, characterized in that: The polarization beam splitter rotator is configured to allow one polarization state optical signal to pass directly along the original path without change, and another polarization state optical signal at 90 degrees to rotate the polarization state 90 degrees and change the transmission direction, and transmit along the direction at an angle to the original path direction.