Integrated structure of acousto-optic modulator and isolator

Abstract

The invention belongs to the technical field of acousto-optic, and particularly relates to an acousto-optic modulator and isolator integrated structure which comprises an integrated shell, an acousto-optic modulator is arranged on the left side of an inner cavity of the integrated shell, and an isolator is arranged on the right side of the inner cavity of the integrated shell so as to prevent return light from entering the acousto-optic modulator. Therefore, negative effects on the performance of the acousto-optic modulator are avoided. In the using process, the phenomenon of too high return light and too large occupied space can be avoided to a certain extent, and due to the fact that when an acousto-optic modulator and an isolator are needed in the past, the problems of large matching degree, large occupied space and the like need to be considered, the integrated product is used, and the cost is reduced. Not only can the requirements of customers for debuggers and isolators be met at the same time, but also the problem of small occupied space required by the customers can be solved, and the effect of 1 + 1 > 1 is realized.

Description

Technical Field

[0001] The present invention relates to the field of acousto-optic technology, and in particular to an integrated structure of an acousto-optic modulator and an isolator. Background Art

[0002] In the application field of fiber-coupled acousto-optic modulators, especially in the process of pulse selection using fiber-coupled acousto-optic modulators, we must carefully consider and deal with the potential impact of the return light. Acousto-optic modulators are devices that use the interaction between sound waves and light waves to control the propagation characteristics of light beams by changing the frequency and intensity of sound waves. In the application of pulse selection, fiber-coupled acousto-optic modulators can accurately control the generation and transmission of light pulses, thereby achieving fine manipulation of optical signals.

[0003] However, in practical applications, the use of fiber-coupled AOM may be affected by return light. Return light refers to the phenomenon that the light beam returns to the light source after encountering a reflective surface during propagation. This reflected light may interfere with the normal operation of the fiber-coupled AOM, resulting in a decrease in the accuracy and stability of pulse selection. In order to ensure the performance of the fiber-coupled AOM in pulse selection applications, appropriate measures must be taken to reduce or eliminate the influence of return light.

[0004] An isolator is an electronic device used to isolate electrical or optical signals. Its main function is to prevent the signal from being disturbed or affected during transmission. In modern electronic systems, isolators are widely used, especially in high-frequency signal transmission, power systems, medical equipment, and industrial automation.

[0005] Traditional isolators mainly use the principle of electromagnetic induction to achieve signal isolation through transformers or relays. However, with the development of technology, optical isolators have gradually become mainstream. Optical isolators use optical signal transmission to convert electrical signals into optical signals through the photoelectric effect, and then convert optical signals back to electrical signals to achieve signal isolation. Optical isolators have the advantages of strong anti-interference ability, fast transmission speed, and long life, and are widely used in high-speed data transmission and high-voltage isolation occasions.

[0006] The design and manufacture of isolators involve multiple disciplines, including electronic engineering, materials science, and optics. In order to improve the performance of isolators, researchers are constantly exploring new materials and structural designs. For example, the use of magnetic materials with high magnetic permeability can improve the isolation effect of electromagnetic isolators, while the use of optical materials with high refractive index can improve the transmission efficiency of optical isolators.

[0007] In practical applications, the selection and use of isolators need to be determined according to specific application scenarios and requirements. For example, in high-frequency signal transmission, optical isolators are the first choice due to their excellent anti-interference performance and high-speed transmission capability. In power systems, electromagnetic isolators are widely used due to their high voltage isolation capabilities and reliability. In addition, the design of the isolator also needs to consider factors such as its size, power consumption, and cost. This makes it very troublesome to use an isolator and a fiber-coupled acousto-optic modulator at the same time. Therefore, an integrated structure of an acousto-optic modulator and an isolator is invented. Summary of the invention

[0008] In view of the above problems and / or the problems existing in the existing integrated structure of an acousto-optic modulator and an isolator, the present invention is proposed.

[0009] Therefore, the purpose of the present invention is to provide an integrated structure of an AOM and an isolator. By combining a fiber-coupled AOM and an isolator to form an integrated AOM, the problem that the device is affected by the reflected light when the fiber-coupled AOM is used for pulse selection can be solved.

[0010] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0011] An integrated structure of an acousto-optic modulator and an isolator comprises an integrated shell, an acousto-optic modulator is arranged on the left side of the inner cavity of the integrated shell, and an isolator is arranged on the right side of the inner cavity of the integrated shell to prevent return light from entering the acousto-optic modulator, thereby avoiding negative impact on the performance of the acousto-optic modulator.

[0012] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: A collimator is provided on the left side surface of the integrated housing to accurately collimate the input light beam to ensure the parallelism and stability of the light beam, thereby improving the performance of the entire system.

[0013] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: the left end of the collimator is connected to an optical fiber through an interface so that the light beam can be input.

[0014] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: A lens group is provided on the right side surface of the integrated housing to focus and image the light beam, thereby further improving the quality and stability of the light beam.

[0015] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: the isolator comprises a shell, a magnetic ring, a TGG crystal and a PBS, magnetic rings are provided at both ends of the inner cavity of the shell, and through holes are opened on both sides of the left and right sides of the shell.

[0016] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: a circular hole is opened in the middle of the magnetic ring, and the through hole and the circular hole are aligned.

[0017] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: the inner cavity of the circular hole is provided with a TGG crystal, and the inner cavity of the shell located between the two groups of magnetic rings is provided with a fixing plate.

[0018] As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: As a preferred solution of the integrated structure of an acousto-optic modulator and an isolator described in the present invention, wherein: A PBS is provided in the middle of the fixed plate, and the PBS is located between the two groups of TGG crystals.

[0019] Compared with existing technologies:

[0020] The present invention can effectively reduce the negative impact of the reflected light on the device to a minimum, thereby ensuring that the performance and stability of the device are significantly improved; based on this, the present invention can also avoid the phenomenon of occupying too much space. At this time, it can not only meet the customer's needs for a debugger and an isolator at the same time, but also solve the problem of the customer's need for a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0022] Figure 2 It is a schematic diagram of the isolator process of the present invention;

[0023] Figure 3Schematic diagram of the original pulse sequence output by the laser;

[0024] Figure 4 This is a schematic diagram of the pulse selection function of the present invention;

[0025] Figure 5 The figure is a schematic diagram of the peak value variation of the product waveform of the present invention when driving different RF powers.

[0026] In the figure: optical fiber 10, collimator 20, acousto-optic modulator 30, isolator 40, magnetic ring 41, TGG crystal 42, PBS 43, lens group 50. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] The present invention provides an integrated structure of an acousto-optic modulator and an isolator, see Figure 1-Figure 5 , including an integrated shell, an acousto-optic modulator 30 is arranged on the left side of the inner cavity of the integrated shell, and an isolator 40 is arranged on the right side of the inner cavity of the integrated shell to prevent the return light from entering the acousto-optic modulator 30, thereby avoiding negative impact on the performance of the acousto-optic modulator 30, and a collimator 20 is arranged on the left side of the integrated shell to accurately collimate the input light beam to ensure the parallelism and stability of the light beam, thereby improving the performance of the entire system, and the left end of the collimator 20 is connected to the optical fiber 10 through an interface to enable the light beam to be input, and a lens group 50 is arranged on the right side of the integrated shell to focus and image the light beam, thereby further improving the quality and stability of the light beam; wherein, the integrated shell provides a solid and stable structure for the device, protects the internal components from interference from the external environment, and also facilitates the installation and maintenance of the device.

[0029] During actual use, the user only needs to connect the optical fiber 10 at the input end to the corresponding interface of the device and connect the driving device through the SMA line; next, the user needs to turn on the driving power supply and input the required light source; through simple operation steps, the user can smoothly use the acousto-optic modulator 30 without worrying about the negative impact of the reflected light. The whole operation process is simple and fast, which greatly improves the user experience and work efficiency; in addition, the present invention also takes into account the convenience and flexibility of operation; the product is directly connected to the corresponding driving device using a radio frequency line, thereby realizing the convenience of plug-and-play, which greatly simplifies the complex process of installation and debugging of traditional equipment.

[0030] In addition, in order to further improve the reliability and durability of the device, the present invention also uses high-quality materials and advanced manufacturing processes. The selection of these materials and processes ensures that the device can maintain stable performance even in harsh working environments and greatly prolongs the service life of the device.

[0031] The present invention also provides convenience in terms of maintenance; the structural design of the device makes it easy to disassemble and replace the various components, and even when a failure occurs or an upgrade is required, the user can easily complete the relevant operations without the need for professional skills or complex tools; at the same time, the device is also equipped with a detailed user manual and maintenance guide to help users better understand and use the device.

[0032] In summary, the present invention not only effectively reduces the negative impact of the reflected light on the acousto-optic modulator, but also improves the performance, reliability, convenience and durability of the device through careful design and manufacturing; these advantages make the device have broad application prospects in many fields such as scientific research, industrial production and communications, and bring users a more efficient, stable and convenient working experience.

[0033] The isolator 40 includes a shell, a magnetic ring 41, a TGG crystal 42 and a PBS43 (PBS refers to a polarization beam splitter). Magnetic rings 41 are provided at both ends of the inner cavity of the shell, through holes are provided on both sides of the left and right sides of the shell, a circular hole is provided in the middle of the magnetic ring 41, and the through hole and the circular hole are aligned, a TGG crystal 42 is provided in the inner cavity of the circular hole, a fixing plate is provided in the inner cavity of the shell between the two groups of magnetic rings 41, a PBS43 is provided in the middle of the fixing plate, and the PBS43 is located between the two groups of TGG crystals 42.

[0034] Based on the above, the analysis results of the isolator are as follows:

[0035] 1. The structure of the isolator enables the present invention to perform well when facing the influence of the reflected light and is almost not disturbed by it; at the same time, the present invention also has the function of pulse selection, so that it can more flexibly control the output of laser pulses during operation.

[0036] 2. The design of the isolator cleverly solves the signal interference problem often encountered in the use of traditional fiber-coupled acousto-optic modulators; due to the existence of the isolator, the interference caused by reflected light is greatly reduced, thereby significantly improving the stability and reliability of the entire system; this improvement enables users to obtain more accurate and consistent measurement results during use;

[0037] 3. By cleverly integrating the pulse selection function, the present invention can drive the internal circuit by applying external driving power; and then by adjusting the driving power, precise control of the laser pulse output can be achieved; the addition of this function enables the present invention to provide more convenient operation when performing precision measurements and optical experiments; users can flexibly adjust the frequency and intensity of the laser pulse according to experimental requirements, so as to obtain the best experimental effect.

[0038] 4. The structural design of the present invention is compact and can be easily integrated into existing optical systems; users can easily integrate the present invention into existing optical equipment without large-scale system modifications; the flexibility of this design greatly reduces the user's usage threshold, allowing more users to enjoy the convenience brought by the present invention.

[0039] 5. Due to its superior performance and versatility, the present invention will have broad application prospects in multiple fields such as optical communication, laser processing, biomedical imaging, etc.; its unique isolator design and pulse selection function make the present invention perform well in these fields and can meet various complex application requirements; with the continuous development of technology, the application scope of the present invention will be further expanded, bringing revolutionary changes to more fields.

[0040] In the present invention, Figure 3 The original pulse sequence diagram of the laser output; connect the modulation interface of the driver to the signal generator; then connect the driver to the product; by adjusting the parameters of the signal generator, the product of the present invention can generate the required pulse sequence and realize the pulse selection function, as shown in the following figure. Figure 4 shown.

[0041] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An integrated structure of an acousto-optic modulator and an isolator, characterized in that: An integrated housing is provided, wherein an acousto-optic modulator (30) is arranged on the left side of an inner cavity of the integrated housing, and an isolator (40) is arranged on the right side of the inner cavity of the integrated housing to prevent return light from entering the acousto-optic modulator (30), thereby avoiding a negative impact on the performance of the acousto-optic modulator (30).

2. The integrated structure of an acousto-optic modulator and an isolator according to claim 1, characterized in that: A collimator (20) is provided on the left side of the integrated housing to accurately collimate the input light beam, thereby ensuring the parallelism and stability of the light beam, thereby improving the performance of the entire system.

3. The integrated structure of an acousto-optic modulator and an isolator according to claim 2, characterized in that: The left end of the collimator (20) is connected to an optical fiber (10) via an interface so that a light beam can be input.

4. The integrated structure of an acousto-optic modulator and an isolator according to claim 3, characterized in that: A lens group (50) is provided on the right side of the integrated housing to focus and image the light beam, thereby further improving the quality and stability of the light beam.

5. The integrated structure of an acousto-optic modulator and an isolator according to claim 1, characterized in that: The isolator (40) comprises a shell, a magnetic ring (41), a TGG crystal (42) and a PBS (43); the left and right ends of the inner cavity of the shell are both provided with magnetic rings (41); and the left and right sides of the shell are both provided with through holes.

6. The integrated structure of an acousto-optic modulator and an isolator according to claim 5, characterized in that: A circular hole is provided in the middle of the magnetic ring (41), and the through hole and the circular hole are aligned.

7. The integrated structure of an acousto-optic modulator and an isolator according to claim 6, characterized in that: The inner cavity of the circular hole is provided with a TGG crystal (42), and the inner cavity of the shell body located between the two groups of magnetic rings (41) is provided with a fixing plate.

8. The integrated structure of an acousto-optic modulator and an isolator according to claim 7, characterized in that: A PBS (43) is provided in the middle of the fixing plate, and the PBS (43) is located between two groups of TGG crystals (42).

Images