Multi-channel hollow optical slip ring structure for realizing uninterrupted low loss of laser medium

Abstract

The utility model discloses a multichannel hollow optical slip ring structure capable of realizing uninterrupted low loss of a laser medium. The multichannel hollow optical slip ring structure comprises a stator end, a rotor end and a novel Dove prism structure arranged in the rotor end. In the rotor, a first optical fiber channel is arranged close to the outer side of the incident inclined plane of the novel Dove prism structure, and an incident optical fiber collimator is arranged in the first optical fiber channel. In the stator, two second optical fiber channels corresponding to the first optical fiber channels are arranged on the outer side of the emergent inclined plane close to the Dove prism structure, and receiving optical fiber collimators are arranged in the two second optical fiber channels. An optical signal enters the novel Dove prism structure after passing through the input end optical fiber collimator, the novel Dove prism structure is provided with the circular through hole along the central axis of the solid Dove prism, and the transmission of a laser medium in the circular through hole and the transmission of a paraxial optical signal do not influence each other and do not interfere with each other. And relative rotation of the rotor and the optical fiber collimator at the incident end is considered, so that optical signals are transmitted continuously with low loss.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber communication equipment, in particular to a multi-channel hollow smooth ring structure that realizes uninterrupted low-loss laser media. Background Art

[0002] The smooth ring is a device for transmitting optical fiber signals between rotating and stationary platforms. It is widely used in large optical fiber signal data transmission in airborne, shipborne, and spherical systems. The traditional smooth ring is coaxial, that is, the signal transmission path coincides with the central axis of the optical device. It is characterized by a simple optical path and a small size. However, because the central axis is occupied by other media or devices, such as vehicle-mounted laser emission channels, radar waveguides, and high-pressure gas transmissions, where optical signals cannot be transmitted along the optical axis that coincides with the central axis, in order to achieve integrated rotational transmission of light, electricity, liquid, and gas and solve the problem of mutual interference suppression, off-axis transmission of optical signals becomes necessary. Therefore, hollow smooth rings came into being, with structures such as Figure 1 As shown, it consists of a rotor end ring and a stator end, its medium channel is located on the central axis, and the optical signal transmission path is located at the paraxial position.

[0003] Traditional hollow smooth rings mainly include direct coupling type, light reflection and refraction type, waveguide type, motor drive type, etc. However, these hollow smooth ring structures generally have the following shortcomings:

[0004] (1) It is impossible to achieve uninterrupted continuous transmission of optical signals and cannot meet the normal communication requirements of the system;

[0005] (2) The loss is too large to meet the optical receiving sensitivity requirements of the system optical link.

[0006] For example, the direct coupling type uses a fiber collimator to directly align the input fiber and the output fiber, but this structure does not take into account the assembly accuracy and coupling difficulty, and there are problems such as discontinuous optical signal transmission, small light spot, and large coupling loss. The hollow smooth ring with an annular reflector with an output window is to place the light source in the inner cavity of the annular reflector, the receiver is placed near the output window, and the lens is used to converge the light beam emitted from the reflector. However, in this smooth ring structure, the light source is placed in the reflector cavity, which is not conducive to the structural design, and the middle channel is occupied, and the overall insertion loss is large. The hollow smooth ring with a plane-cone reflection structure adopts the dynamic input of the bypass rotating signal beam. The signal beams at different times are dynamically transmitted around the axis in the plane-cone reflection structure in the same law. When the exit window meets certain conditions, it can ensure that the signal beams at different times can be emitted from the exit window. This method realizes uninterrupted transmission, but the loss of the smooth ring of this structure usually reaches 10dB, and the parallelism of the light after steering and the rotation axis is very high, and the steering structure design is not realized. The hollow smooth ring of the annular optical waveguide with V-groove adopts the optical signal emitted from the input end to enter the annular waveguide after passing through the optical fiber collimator. After the optical signal is coupled into the annular waveguide, it is transmitted in the waveguide by the reflection of the V-groove, and finally coupled out of the waveguide and received by the receiver. This structure is difficult to process, and the single coupling loss is about 40dB. Utility Model Content

[0007] In order to solve the technical problems mentioned in the background technology, the utility model provides a multi-channel hollow smooth ring structure that realizes uninterrupted low-loss of laser medium.

[0008] The utility model adopts the following technical scheme: a multi-channel hollow smooth ring structure for realizing uninterrupted low-loss laser medium, comprising a stator end for setting a stator and a rotor end for setting a rotor, wherein the stator end and the rotor end are rotatably connected to each other, and further comprising a novel dove prism structure arranged in the rotor end, wherein the dove prism structure is positioned between the stator and the rotor for transmitting optical signals; the axial section of the novel dove prism structure is an isosceles trapezoid, comprising an incident inclined plane, a reflection plane, and an exit inclined plane, and a circular through hole is provided on the incident inclined plane and the exit inclined plane along the central axis direction; shaped air hole; in the rotor, a first optical fiber channel is arranged outside the incident inclined surface close to the new Dove prism structure; an incident optical fiber collimator is arranged in the first optical fiber channel; in the stator, two second optical fiber channels corresponding to the first optical fiber channel are arranged outside the exit inclined surface close to the Dove prism structure, and receiving optical fiber collimators are arranged in the two second optical fiber channels; the rotor at the rotor end rotates coaxially with the new Dove prism structure, and the rotor end is configured so that when the rotor rotates at a speed ω, the new Dove prism structure rotates at a speed ω / 2.

[0009] Furthermore, the cross sections of the incident inclined surface and the exit inclined surface are both coated with an anti-reflection film layer.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] The utility model is designed to realize the multi-channel hollow smooth ring structure of uninterrupted low-loss laser medium. After the optical signal passes through the input end optical fiber collimator, it is incident into the new dove prism structure. The new dove prism structure has a circular through hole along the central axis of the solid dove prism. After the optical signal is coupled into the prism, it is finally transferred to the output prism by relying on the reflection surface of its bottom surface for many times and is received by the receiving collimator. The circular through hole can be used to transmit laser as an air hole. The transmission of laser medium and the optical signal of the side axis through the circular through hole do not affect each other and will not interfere. The relative rotation of the rotor and the optical fiber collimator at the incident end is taken into account, so that the optical signal is transmitted uninterruptedly with low loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic cross-sectional structure diagram of a multi-channel hollow smooth ring structure that realizes uninterrupted low-loss laser medium in the utility model;

[0013] Figure 2 Schematic diagram of optical path coupling of the multi-channel hollow optical fiber slip ring of the utility model Figure 1 ;

[0014] Figure 3 Schematic diagram of optical path coupling of the multi-channel hollow optical fiber slip ring of the utility model Figure 2 ;

[0015] Figure 4 It is a schematic diagram of the overall structure of the novel dove prism structure of the utility model;

[0016] Figure 5 It is a cross-sectional view of the incident oblique plane of the novel Dove prism structure of the utility model.

[0017] in:

[0018] 1-stator, 2-rotor, 3-combined Dove prism structure, 4-incident fiber collimator, 5-receiving fiber collimator,

[0019] 11-second optical fiber channel, 21-first optical fiber channel,

[0020] 31 - incident inclined plane, 32 - reflecting plane, 33 - exit inclined plane, 34 - circular air hole. DETAILED DESCRIPTION

[0021] In order to facilitate those skilled in the art to understand the technical solution of the utility model, further description is now made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.

[0022] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0023] Please refer to Figure 1 , which is a schematic cross-sectional structure diagram of a multi-channel hollow smooth ring structure for realizing uninterrupted low-loss laser medium in the utility model, including a stator end where a stator 1 is arranged, a rotor end where a rotor 2 is arranged, the stator end and the rotor end are rotatably connected to each other, and also includes a new type of dove prism structure 3 arranged in the rotor end, the dove prism structure 3 is positioned between the stator 1 and the rotor 2, and is used to transmit optical signals.

[0024] like Figure 4 The figure shows the overall structure of the novel Dove prism structure of the utility model. The 3-axis cross section of the novel Dove prism structure is an isosceles trapezoid, including an incident inclined surface 31, a reflection surface 32, and an exit inclined surface 33. The incident inclined surface 31 and the exit inclined surface 33 are provided with a circular air hole 34 extending along the central axis, and the laser is transmitted in the circular air hole 34. In the specific implementation, the cross sections of the incident inclined surface 31 and the exit inclined surface 33 are coated with an anti-reflection film layer to reduce or eliminate the reflected light on the incident surface and the exit surface of the prism, thereby increasing the light transmittance of the Dove prism. In the rotor 2, a first optical fiber channel 21 is arranged near the outer side of the incident inclined surface 31 of the novel Dove prism structure. An incident fiber collimator 4 is arranged in the first fiber channel 21. In the stator 1, two second fiber channels 11 corresponding to the first fiber channel 21 are arranged near the outer side of the exit inclined surface of the Dove prism structure, and receiving fiber collimators 5 are arranged in the two second fiber channels 11. The rotor 2 in the rotor end rotates coaxially with the new Dove prism structure, and the rotor end is configured so that when the rotor 2 rotates at a speed of ω, the new Dove prism structure rotates at a speed of ω / 2. Specifically, when arranging the incident fiber collimator 4 at the input end, it is necessary to make the incident light completely incident on the side surface of the prism during the rotation process to avoid being incident on the air hole.

[0025] like Figure 2-3 The figure shows a schematic diagram of the optical path coupling of the multi-channel hollow fiber slip ring of the utility model. In this structure, the incident light signal passes through the input end incident fiber collimator 4 and is incident on the new Dove prism. After the light signal is coupled into the prism, it is finally transferred to the output prism by the reflection of its bottom surface and received by the receiving collimator. When the input light rotates one circle relative to the Dove prism, the two receiving collimators will receive the light signal at different angles, and finally the coupler will couple the two light signals and output them. Figure 5As shown, it is an incident oblique cross-sectional view of the novel Dove prism structure of the utility model. The part of the incident light outside the vertical line range is reflected by route 1 in the figure and emitted through the first receiving fiber collimator 5. As long as the incident end collimator and the Dove prism rotate at an angular velocity of 2:1, the output light position remains unchanged. The part within the vertical line range is reflected by route 2 in the figure, and the transmission in the prism passes through the circular air through hole 34 of the transmission laser medium. Compared with the solid Dove prism, there are two more refractions and reflections, so the output light spot will also be axially offset and reflected by route 2 in the figure. The output light is received by the second receiving fiber collimator 5, and finally the optical switch outputs the two optical signals alternately.

[0026] In summary, the utility model designs a multi-channel hollow smooth ring structure that realizes uninterrupted low-loss laser medium. After the optical signal passes through the input end fiber collimator, it is incident on the new Dove prism structure. The new Dove prism structure has a circular through hole along the central axis of the solid Dove prism. After the optical signal is coupled into the prism, it is finally transferred to the output prism by relying on the reflection surface of its bottom surface for multiple times and is received by the receiving collimator. The circular through hole can be used as an air hole to transmit laser. The transmission of the laser medium through the circular through hole and the transmission of the optical signal of the side axis do not affect each other and will not interfere. The relative rotation of the rotor and the optical fiber collimator at the incident end is taken into account, so that the optical signal is transmitted uninterruptedly with low loss.

[0027] The above embodiments are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-channel hollow smooth ring structure for realizing uninterrupted low-loss laser medium, comprising a stator end for setting a stator (1) and a rotor end for setting a rotor (2), wherein the stator end and the rotor end are rotatably connected to each other, characterized in that: The invention also comprises a novel Dove prism structure (3) arranged at the rotor end, the Dove prism structure (3) being positioned between the stator (1) and the rotor (2) and being used for transmitting optical signals; the axial cross section of the novel Dove prism structure (3) is in the shape of an isosceles trapezoid, comprising an incident inclined surface (31), a reflection surface (32), and an exit inclined surface (33), and circular air holes (34) penetrating the incident inclined surface (31) and the exit inclined surface (33) are provided along the central axis; in the rotor (2), a dove prism structure (34) is arranged near the outer side of the incident inclined surface (31) of the novel Dove prism structure A first optical fiber channel (21); an incident optical fiber collimator (4) is arranged in the first optical fiber channel (21); in the stator (1), two second optical fiber channels (11) corresponding to the first optical fiber channel (21) are arranged near the outer side of the exit inclined surface of the Dove prism structure, and receiving optical fiber collimators (5) are arranged in the two second optical fiber channels (11); the rotor (2) in the rotor end rotates coaxially with the novel Dove prism structure, and the rotor end is configured so that when the rotor (2) rotates at a speed ω, the novel Dove prism structure rotates at a speed ω / 2.

2. The multi-channel hollow smooth ring structure for realizing uninterrupted low-loss laser medium according to claim 1, characterized in that: The cross sections of the incident inclined surface (31) and the exit inclined surface (33) are both coated with an anti-reflection film layer.

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