Laser emitting device for optical communication

Abstract

The invention relates to a laser emitting device for optical communication. The laser emitting device includes: a transmission fiber configured to transmit a laser beam; the collimating mirror is configured to collimate the laser beam to obtain a collimated laser beam and emit the collimated laser beam; the adjusting lens is configured to be switched between a first position and a second position so as to change the divergence angle of the collimated laser beam, the first position is located in the light path between the transmission optical fiber and the collimating lens, and the second position is located outside the light path. According to the laser emitting device for optical communication, the divergence angle of the laser beam can be adjusted, high efficiency and stability are achieved, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of optical communication, and more specifically to a laser emitting device for optical communication. Background Art

[0002] In the process of optical communication, if the laser emitting device used for optical communication changes the divergence angle of the laser beam it emits, it can efficiently realize optical communication with the corresponding laser receiving device at different stages of optical communication. Generally, in the laser emitting device, a moving mechanism is set to accurately move the optical device in the laser emitting device, so as to gradually adjust the divergence angle of the emitted laser beam. However, the optical device in the laser emitting device needs to be accurately aligned and accurately moved to the expected position, and the slight deviation of the moving mechanism (for example, micrometer level or less) may cause a large change in the light path in the laser emitting device, thereby affecting the stability of the laser emitting device. This makes the performance requirements of the moving mechanism higher, resulting in higher costs, and the moving mechanism needs to gradually adjust the position of the optical device to avoid affecting the stability of the laser emitting device. In addition, this method requires a sensor with high precision to detect the position of the moving mechanism to achieve accurate positioning of the position of the optical device. Therefore, this method causes the structure of the laser emitting device to be complex, and it is impossible to efficiently and stably achieve accurate adjustment of the divergence angle of the laser beam.

[0003] In summary, the disadvantages of conventional laser emitting devices for optical communication are: low efficiency in adjusting the divergence angle of the laser beam, poor adjustment stability, complex structure, and high cost. Summary of the invention

[0004] The present invention provides a laser emitting device for optical communication, which can adjust the divergence angle of a laser beam with high efficiency and stability, has a simple structure and is low in cost.

[0005] According to a first aspect of the present invention, there is provided a laser emitting device for optical communication, comprising: a transmission optical fiber configured to transmit a laser beam; a collimator configured to collimate the laser beam to obtain a collimated laser beam, and to emit the collimated laser beam; and an adjustment lens configured to switch between a first position and a second position to change a divergence angle of the collimated laser beam, wherein the first position is located in a light path between the transmission optical fiber and the collimator, and the second position is located outside the light path.

[0006] In some embodiments, the laser emitting device has an expected maximum divergence angle and an expected minimum divergence angle for the collimated laser beam, and the adjustment lens is configured to switch between the first position and the second position so that the divergence angle of the collimated laser beam switches between the expected maximum divergence angle and the expected minimum divergence angle.

[0007] In some embodiments, the adjustment lens is configured to be switched to one of the first position and the second position during the link establishment phase of the optical communication so that the collimated laser beam has the expected maximum divergence angle, and the link establishment phase represents a phase in which the laser emitting device uses the collimated laser beam to scan the optical communication environment to find a corresponding laser receiving device.

[0008] In some embodiments, the adjustment lens is configured to be switched to the other of the first position and the second position during a signal transmission phase of the optical communication so that the collimated laser beam has the expected minimum divergence angle, and the signal transmission phase represents a phase in which the laser emitting device and the laser receiving device perform signal transmission.

[0009] In some embodiments, lens parameters of the adjustment lens and the relative distance of the first position relative to the transmission optical fiber and the collimator are determined based on at least one of the following items: the expected maximum divergence angle, the expected minimum divergence angle, the beam radius of the laser beam, collimator parameters of the collimator, or the distance between the transmission optical fiber and the collimator.

[0010] In some embodiments, the lens parameters include at least one of the following items: the size of the adjusting lens, the surface shape of the adjusting lens, the curvature of the adjusting lens, the material of the adjusting lens, or the coating requirements of the adjusting lens.

[0011] In some embodiments, the collimator includes at least one collimator lens, and the collimator parameters include at least one of the following items: the size of each collimator lens in the at least one collimator lens, the material of each collimator lens in the at least one collimator lens, or the spacing between each collimator lens in the at least one collimator lens.

[0012] In some embodiments, the laser emitting device further includes: a driver configured to drive the adjustment lens to move in a predetermined manner to switch between the first position and the second position, and the predetermined manner includes a linear movement manner or a rotational movement manner.

[0013] In some embodiments, the laser emitting device further includes: a limiting component configured to stop the adjusting lens when the adjusting lens is moved to the first position or the second position to prevent the adjusting lens from colliding with other components in the laser emitting device.

[0014] In some embodiments, the adjustment lens includes at least one of the following: a flat lens, or a curved lens.

[0015] It should be understood that the beneficial effect of the present invention is that by configuring an adjustment lens for switching between a first position and a second position, the adjustment lens can be located in the optical path or outside the optical path of the laser emitting device, thereby being able to simply, efficiently and accurately adjust the divergence angle of the laser beam, simplifying the structure of the laser emitting device and reducing the cost of the laser emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements.

[0017] Figure 1 A schematic diagram illustrating an example environment in which an apparatus according to an embodiment of the present invention may be implemented is shown.

[0018] Figure 2 A schematic block diagram of a laser emitting device for optical communication according to an embodiment of the present invention is shown.

[0019] Figure 3 A schematic block diagram of a laser emitting device for optical communication according to another embodiment of the present invention is shown.

[0020] Figure 4 A schematic block diagram of a laser emitting device for optical communication according to yet another embodiment of the present invention is shown.

[0021] Figure 5 A schematic diagram showing an adjustment lens of a laser emitting device for optical communication according to an embodiment of the present invention being located at a first position is shown.

[0022] Figure 6 A schematic diagram showing that the adjustment lens of the laser emitting device for optical communication according to an embodiment of the present invention is located at the second position.

[0023] In the various drawings, the same or corresponding reference numerals represent the same or corresponding parts. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0026] As described above, the disadvantages of conventional laser emitting devices for optical communication are: low efficiency in adjusting the divergence angle of the laser beam, poor adjustment stability, complex structure, and high cost.

[0027] Traditionally, in order to adjust the divergence angle of the laser beam emitted by the laser emitting device for optical communication, in some implementations, a high-precision moving mechanism and a high-precision sensor are provided in the laser emitting device to adjust the distance between some lenses in the collimating lens group in the laser emitting device, so that the focal length or back intercept of the collimating lens group changes, thereby adjusting the divergence angle of the laser beam emitted by the laser emitting device. However, in addition to the above-mentioned shortcomings, this implementation method is also very likely to cause damage to the arrangement structure of the collimating lens group (for example, mismatch or collision between lenses in the collimating lens group, etc.).

[0028] In some other conventional implementations, in the laser emitting device, optical devices such as a moving optical wedge and a static optical wedge that match each other are arranged outside the collimator lens group, and a high-precision moving mechanism and a high-precision sensor are arranged to move the position of the moving optical wedge to change the optical path of the laser beam in the laser emitting device, thereby adjusting the divergence angle of the laser beam emitted by the laser emitting device. However, in this implementation, there are also the following shortcomings: the corresponding planes of the moving optical wedge and the static optical wedge need to be accurately parallel to each other, and the moving optical wedge needs to move strictly along the moving trajectory corresponding to the parallel plane, making the setting of the moving optical wedge and the static optical wedge more complicated and costly. In addition, the relative moving distance between the moving optical wedge and the static optical wedge is limited, so that only a small change in the optical path difference can be obtained, resulting in a small adjustment range for the divergence angle. In addition, in this implementation, the back intercept of the collimator lens group needs to be greater than the thickness of the moving optical wedge and the static optical wedge, resulting in a large volume of the laser emitting device.

[0029] In addition, in the above various implementations, when the laser emitting device is restarted after an accidental power failure, the specific position of the moving mechanism cannot be known due to the loss of sensor data, and thus the current divergence angle of the laser emitting device cannot be known, resulting in the laser emitting device being unable to work normally.

[0030] In order to at least partially solve one or more of the above problems and other potential problems, an exemplary embodiment of the present invention provides a laser emitting device for optical communication. In the laser emitting device, an adjustment lens for switching between a first position and a second position is configured so that the adjustment lens can be located in or outside the optical path of the laser emitting device, thereby enabling simple, efficient and accurate adjustment of the divergence angle of the laser beam, simplifying the structure of the laser emitting device and reducing the cost of the laser emitting device.

[0031] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1 A schematic diagram illustrating an example environment in which an apparatus according to an embodiment of the present invention may be implemented is shown. Figure 1 The example environment shown may be an optical communication environment, which includes a laser emitting device 100-1 and a plurality of other devices 100-2, 100-3, 100-4, ..., 100-N (N is an integer greater than 1) for optical communication. The plurality of other devices 100-2, 100-3, 100-4, ..., 100-N may be devices that can perform optical communication with the laser emitting device 100-1 as corresponding laser receiving devices.

[0032] In the link establishment stage of optical communication, the laser emitting device 100-1 can use its laser beam (for example, a collimated laser beam) to scan the optical communication environment to find other devices 100-2, 100-3, 100-4, ..., or 100-N in the optical communication environment. After the laser emitting device 100-1 scans the corresponding other devices 100-2, 100-3, 100-4, ..., or 100-N, signal transmission can be performed between the two. Therefore, during the scanning (link establishment) process, in order to improve the efficiency of discovering other devices 100-2, 100-3, 100-4, ..., or 100-N in the optical communication environment, it is expected that the laser emitting device 100-1 uses a laser beam with a divergence angle as large as possible for scanning. During the signal transmission process, in order to improve the signal transmission quality, it is expected to use a laser beam with a divergence angle as small as possible for signal transmission.

[0033] It should be understood that although Figure 1In the example optical communication environment in FIG. 1 , only one laser emitting device 100-1 is shown, and other devices 100-2, 100-3, 100-4, ..., or 100-N are shown as laser receiving devices. However, in actual applications, there may be other laser emitting devices and other laser receiving devices in the optical communication environment, or Figure 1 The laser emitting device 100-1 shown and at least one of the other devices 100-2, 100-3, 100-4, ..., 100-N may have transceiver functions at the same time, so as to be used as a laser emitting device or a laser receiving device according to the usage scenario.

[0034] The following will be Figure 1 The laser emitting device according to an embodiment of the present invention is described by taking the laser emitting device 100-1 in FIG. 1 as an example. Figure 2 A schematic block diagram of a laser emitting device for optical communication according to an embodiment of the present invention is shown. Figure 2 The laser emitting device shown may be, for example, as described above Figure 1 The laser emitting device 100-1 in FIG. Figure 2 As shown, the laser emitting device includes a transmission optical fiber 210 , a collimating lens 220 and an adjusting lens 230 .

[0035] The transmission optical fiber 210 is configured to transmit a laser beam. For example, the laser beam transmitted by the transmission optical fiber 210 may be a laser beam emitted by a laser source used for the laser emitting device. The collimator 220 is configured to collimate the laser beam to obtain a collimated laser beam and emit the collimated laser beam. In some embodiments, the collimator 220 may include at least one collimator lens, which forms a collimator lens group to collimate the laser beam. The adjustment lens 230 is configured to switch between a first position and a second position to change the divergence angle of the collimated laser beam, the first position being located in the optical path between the transmission optical fiber 210 and the collimator 220, and the second position being located outside the optical path. Since the adjustment lens 230 only needs to switch between the optical path and the optical path to achieve the switching of different divergence angles, the divergence angle of the laser emitting device can be accurately adjusted, and the adjustment can be achieved with a simple structure and a low cost.

[0036] In some embodiments, the adjustment lens 230 may include a flat lens. In other embodiments, the adjustment lens 230 may include a curved lens (for example, in the case where it is desired to further accurately set the divergence angle). Thus, the adjustment lens 230 may be implemented with a very simple structure, so that the adjustment lens 230 only occupies a very small space in the laser emitting device. For example, the diameter of the adjustment lens 230 may be close to the diameter of the cross section of the transmission optical fiber 210.

[0037] According to the above-mentioned laser emitting device of an embodiment of the present invention, by configuring an adjustment lens 230 for switching between a first position and a second position, the adjustment lens 230 can be located in the optical path of the laser emitting device or outside the optical path, thereby being able to simply, efficiently and accurately adjust the divergence angle of the laser beam, thereby simplifying the structure of the laser emitting device and reducing the cost of the laser emitting device.

[0038] In addition, in order to facilitate switching of the position of the adjustment lens 230, in some embodiments, the laser emitting device according to the embodiment of the present invention may further include a driver. Figure 3 A schematic block diagram of a laser emitting device for optical communication according to another embodiment of the present invention is shown. Figure 3 The laser emitting device shown is Figure 2 The laser emitting device shown is different in that the laser emitting device further includes a driver 310 .

[0039] The driver 310 may be configured to drive the adjustment lens 230 to move in a predetermined manner to switch between the first position and the second position. In some embodiments, the predetermined manner may include a linear movement manner. In other embodiments, the predetermined manner may include a rotational movement manner.

[0040] Here, since the driver 310 only needs to switch the adjustment lens 230 into or out of the optical path of the laser emitting device, any driving mechanism with a simple structure and no need for high precision can be used to implement the driver 310. For example, compared with the driving mechanism in the conventional laser emitting device described above, the laser emitting device according to the present invention can use a driver 310 with a precision several orders of magnitude lower. As a result, the structure of the laser emitting device can be further simplified and the cost can be further saved.

[0041] Since the structure of the driver 310 is simple, in some embodiments, the driver 310 can be conveniently disposed on the inner wall or outer wall of the housing of the laser emitting device, or on any structure other than the inner wall and the outer wall. In some embodiments, when the driver 310 is disposed on the outer wall of the housing of the laser emitting device or on a structure outside the outer wall, it is only necessary to provide a small slot on the housing of the laser emitting device so that the components of the driver 310 or the adjustment lens 230 can move through the slot to achieve position switching of the adjustment lens 230 (to be further described in the examples below).

[0042] In addition, in order to prevent the adjustment lens 230 from colliding with other components in the laser emitting device during the movement, in some embodiments, the laser emitting device according to the embodiment of the present invention may further include a limiting component. Figure 4A schematic block diagram of a laser emitting device for optical communication according to yet another embodiment of the present invention is shown. Figure 4 The laser emitting device shown is Figure 3 The difference of the laser emitting device shown is that the laser emitting device further includes a limiting component 410 .

[0043] The limiting component 410 can be configured to stop the adjusting lens 230 when the adjusting lens 230 is moved to the first position or the second position to prevent the adjusting lens 230 from colliding with other components in the laser emitting device. In some embodiments, the limiting component 410 can be implemented as a travel switch to stop the driver 310 when, for example, a component of the driver 310 contacts the travel switch. Thus, more accurate positioning of the adjusting lens 230 can be achieved at a lower cost and a simple structure without the need for a high-precision sensor in the conventional laser emitting device described above. This further reduces the cost of the laser emitting device and simplifies the structure of the laser emitting device.

[0044] In addition, the above-mentioned limiting component 410 can also make it possible to simply move the adjustment lens 230 to one of the first position and the second position when the laser emitting device is restarted after an accidental power failure, without causing the laser emitting device to fail to work properly. For example, when the laser emitting device is restarted, the driver 310 can be driven to move the adjustment lens 230 in any drivable direction. When the driver 310 contacts the travel switch and stops running, it can be determined that the divergence angle of the laser emitting device is switched to the divergence angle corresponding to the first position or the second position (for example, it can be determined by judging whether the travel switch for the first position or the second position contacts the driver). In this way, the stable operation of the laser emitting device can be guaranteed under any circumstances.

[0045] In addition, Figure 2 , Figure 3 and Figure 4 In some embodiments, the laser emitting device may have an expected maximum divergence angle and an expected minimum divergence angle for the collimated laser beam. In this case, in some embodiments, the adjustment lens 230 may be configured to switch between the first position and the second position so that the divergence angle of the collimated laser beam switches between the expected maximum divergence angle and the expected minimum divergence angle.

[0046] In some embodiments, the adjustment lens 230 may be configured to be switched to one of the first position and the second position during the link establishment phase of optical communication so that the collimated laser beam has a desired maximum divergence angle. In some embodiments, as described above, the link establishment phase may represent that the laser emitting device (e.g., Figure 1The laser emitting device 100-1 in the embodiment uses a collimated laser beam to transmit light to an optical communication environment (eg, Figure 1 The optical communication environment shown in the figure) is scanned to find the corresponding laser receiving device (for example, Figure 1 The other devices 100-2, 100-3, 100-4, ..., or 100-N) shown in the stage.

[0047] In some embodiments, the adjustment lens 230 can be configured to be switched to the other of the first position and the second position during the signal transmission phase of the optical communication so that the collimated laser beam has a desired minimum divergence angle. In some embodiments, as described above, the signal transmission phase can represent the laser emitting device (e.g., Figure 1 The laser emitting device 100-1) and the laser receiving device (for example, Figure 1 The other devices 100-2, 100-3, 100-4, ..., or 100-N) shown are performing a stage of signal transmission.

[0048] The following reference Figure 5 and Figure 6 An example in which the adjustment lens 230 is switched between the first position and the second position will be described. Figure 5 A schematic diagram showing a laser emitting device for optical communication according to an embodiment of the present invention in which the adjusting lens 230 is located at a first position. Figure 6 FIG. 2 is a schematic diagram showing a laser emitting device for optical communication according to an embodiment of the present invention, wherein the adjusting lens 230 is located in the second position. Figure 5 and Figure 6 In the figure, the dotted arrow is used to represent the laser beam and the optical path of the laser beam, and the direction of the dotted arrow represents the transmission direction of the laser beam. Figure 5 and Figure 6 The transmission fiber 210, collimator 220, adjustment lens 230 and driver 310 of the laser emitting device are shown. The driver 310 is arranged outside the housing H of the laser emitting device or coupled to the housing H, and the housing H has a slot S so that the driver 310 can shift the adjustment lens 230 via the slot S.

[0049] exist Figure 5 In the example schematic diagram shown, the adjustment lens 230 is driven by the driver 310 to a first position in the optical path between the end face D of the transmission optical fiber 210 and the collimator 220. At this time, the laser emitting device can have one of the expected maximum divergence angle and the expected minimum divergence angle according to the setting.

[0050] exist Figure 6In the example schematic diagram shown, the adjustment lens 230 is driven by the driver 310 to a second position outside the optical path between the end face D of the transmission optical fiber 210 and the collimator 220. At this time, the laser emitting device can have the other of the expected maximum divergence angle and the expected minimum divergence angle according to the setting. It should be understood that Figure 6 The second position shown is only an example. In practical applications, the second position can be set to any position outside the light path indicated by the dotted arrow. For example, the second position can be set inside the housing H.

[0051] Furthermore, it should be understood that Figure 5 and Figure 6 The arrangement of the driver 310 shown is only an example, and the driver 310 may be arranged at any other position that can switch the adjustment lens 230 between the inside and outside of the light path. For example, the driver 310 may be arranged inside the housing H, and in this case, the housing H does not need to be provided with Figure 5 and Figure 6 The slot S shown. Figure 5 and Figure 6 The manner of driving the adjustment lens 230 to perform rotational movement is only an example, and the adjustment lens 230 may also be driven in a linear movement manner.

[0052] In addition, in some embodiments, regarding the above Figures 2 to 6 The lens parameters of the adjustment lens 230 shown, and the relative distance of the first position relative to the transmission optical fiber 210 (for example, the end face D of the transmission optical fiber 210) and the collimator 220 can be determined based on the expected maximum divergence angle of the laser emitting device. In some embodiments, the lens parameters of the adjustment lens 230, and the relative distance of the first position relative to the transmission optical fiber 210 and the collimator 220 can be determined based on the expected minimum divergence angle of the laser emitting device. In some embodiments, the lens parameters of the adjustment lens 230, and the relative distance of the first position relative to the transmission optical fiber 210 and the collimator 220 can be determined based on the beam radius of the laser beam transmitted by the transmission optical fiber 210. In some embodiments, the lens parameters of the adjustment lens 230, and the relative distance of the first position relative to the transmission optical fiber 210 and the collimator 220 can be determined based on the collimator parameters of the collimator 220. In some embodiments, the lens parameters of the adjustment lens 230, and the relative distance of the first position relative to the transmission optical fiber 210 and the collimator 220 can be determined based on the distance between the transmission optical fiber 210 and the collimator 220.

[0053] In some embodiments, adjusting the lens parameters of the lens 230 may include adjusting the size (e.g., diameter or thickness, etc.) of the lens 230. In some embodiments, adjusting the lens parameters of the lens 230 may include adjusting the surface shape of the lens 230. In some embodiments, adjusting the lens parameters of the lens 230 may include adjusting the curvature of the lens 230. In some embodiments, adjusting the lens parameters of the lens 230 may include adjusting the material of the lens 230. In some embodiments, adjusting the lens parameters of the lens 230 may include adjusting the coating requirements of the lens 230.

[0054] In some embodiments, the collimator parameters of the collimator 220 may include the size of each collimator lens in the at least one collimator lens in the collimator 220. In some embodiments, the collimator parameters of the collimator 220 may include the material of each collimator lens in the at least one collimator lens. In some embodiments, the collimator parameters of the collimator 220 may include the spacing between each collimator lens in the at least one collimator lens.

[0055] Some examples of lens parameters of the adjustment lens 230 and collimator lens parameters of the collimator lens 220 are described below with reference to Tables 1 and 2. Table 1 shows the collimator lens parameters of the collimator lens 220. Table 2 shows the collimator lens parameters of the collimator lens 220, the lens parameters of the adjustment lens 230, and the relative distance of the first position relative to the transmission optical fiber 210 and the collimator lens 220.

[0056] Table 1

[0057] Table 2

[0058] Table 1 can correspond to Figure 6 The adjustment lens 230 is shown in the second position (ie, outside the light path). Table 2 may correspond to Figure 5 The adjustment lens 230 is shown in the first position (i.e., in the light path). The serial number 0 in Tables 1 and 2 represents the fiber end face D of the transmission optical fiber 210. The serial numbers 1-4 respectively represent the four surfaces of the two collimating lenses included in the collimating lens 220, for example, the first surface (corresponding to the serial number 1 in Tables 1 and 2, which faces the end face D of the transmission optical fiber 210) and the second surface (corresponding to the serial number 2 in Tables 1 and 2, which is far away from the end face D of the transmission optical fiber 210) of the first collimating lens in the collimating lens 220, and the third surface (corresponding to the serial number 3 in Tables 1 and 2, which faces the second surface) and the fourth surface (corresponding to the serial number 4 in Tables 1 and 2, which is far away from the second surface) of the second collimating lens in the collimating lens 220.

[0059] Table 1 shows the curvature radius, thickness, spacing between collimating lenses, and materials of the collimating lenses of the collimating lens 220. In Table 1, the curvature of the end face D (serial number 0) of the transmission optical fiber 210 is infinite, that is, the end face D is a plane. Along the transmission direction of the laser beam, at a distance of 20.00 mm from the end face D, there is a first surface of the first collimating lens of the collimating lens 220, the curvature of the first surface is infinite, that is, the first surface is a plane, and the material of the first collimating lens is fused silica. Along the transmission direction of the laser beam, at a distance of 3.00 mm from the first surface, there is a second surface of the first collimating lens of the collimating lens 220, the curvature of the second surface is 7.83, that is, the second surface is a curved surface. Along the transmission direction of the laser beam, at a distance of 1.89 mm from the second surface, there is a third surface of the second collimating lens of the collimating lens 220, the curvature of the third surface is 11.99, that is, the third surface is a curved surface, and the material of the second collimating lens is fused silica. Along the transmission direction of the laser beam, at a distance of 2.80 mm from the third surface, there is a fourth surface of the second collimating lens of the collimating lens 220, and the curvature of the fourth surface is -10.02, that is, the fourth surface is a curved surface. Along the transmission direction of the laser beam, at a distance of 5.00 mm from the fourth surface, there is a virtual image plane of the laser emitting device.

[0060] Table 2 is different from Table 1 in that there is also a fifth surface represented by serial number 5 and a sixth surface represented by serial number 6, and the fifth surface and the sixth surface are two surfaces of the adjustment lens 230. Along the transmission direction of the laser beam, the fifth surface is located at a distance of 10.00 mm from the end face D of the transmission optical fiber 210, the curvature of the fifth surface is infinite, that is, the fifth surface is a plane, and the material of the adjustment lens 230 is fused silica. Along the transmission direction of the laser beam, the sixth surface is located at a distance of 2.5 mm from the fifth surface, that is, the thickness of the adjustment lens 230 is 2.5 mm. The curvature of the sixth surface is infinite, that is, the sixth surface is a plane. Along the transmission direction of the laser beam, there is a first surface of the first collimating lens of the collimating lens 220 at a distance of 7.5 mm from the sixth surface, followed by the second surface to the fourth surface.

[0061] In the examples of Table 1 and Table 2, the laser emitting device can achieve a minimum divergence angle of 4.4 mrad (milliradians) and a maximum divergence angle of 434 μrad (microradians). The laser emitting device can achieve a divergence angle switch of up to 10 times.

[0062] It should be understood that the above are only examples of the number of lenses and related parameters and the first position of the collimator 220 and the adjustment lens 230. In actual applications, the number of lenses and related parameters and the first position of the collimator 220 and the adjustment lens 230 can be set to be different from those in Tables 1 and 2, and can also include parameters not shown in Tables 1 and 2 to achieve a higher or lower order of divergence angle switching than the above examples.

[0063] The various processes and processing described above can be performed at a computing device. The computing device includes, for example: at least one processor (at least one graphics processor and at least one central processing unit); and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor. In some embodiments, the method can be implemented as a computer software program or program product, which is tangibly contained in a machine-readable medium. In some embodiments, part or all of the computer program can be loaded and / or installed on the computing device via a read-only memory (ROM) and / or a communication unit. When the computer program is loaded into a random access memory (RAM) and executed by the GPU and the CPU, one or more actions of the method described above can be performed.

[0064] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions for executing various aspects of the present invention. The computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof.

[0065] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. Various aspects of the present invention are described herein with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each box of the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram, can be implemented by computer-readable program instructions.

[0066] These computer-readable program instructions can be provided to a central processing unit of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the central processing unit of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0067] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of a module, program segment or instruction includes one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the function involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be realized by a special hardware-based system that performs the function or action of the specification, or can be realized by a combination of special hardware and computer instructions.

[0068] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0069] The above specific implementations do not constitute a limitation on the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made according to design requirements and other factors.

Claims

1. A laser emitting device for optical communication, characterized in that: include: a transmission optical fiber configured to transmit a laser beam; A collimator lens configured to collimate the laser beam to obtain a collimated laser beam, and emit the collimated laser beam; as well as The adjusting lens is configured to switch between a first position and a second position to change the divergence angle of the collimated laser beam, wherein the first position is located in the optical path between the transmission optical fiber and the collimating lens, and the second position is located outside the optical path.

2. The laser emitting device according to claim 1, characterized in that: The laser emitting device has an expected maximum divergence angle and an expected minimum divergence angle for the collimated laser beam, and The adjustment lens is configured to be switched between the first position and the second position so that the divergence angle of the collimated laser beam is switched between the expected maximum divergence angle and the expected minimum divergence angle.

3. The laser emitting device according to claim 2, characterized in that: The adjusting lens is configured to be switched to one of the first position and the second position during the link establishment phase of the optical communication so that the collimated laser beam has the expected maximum divergence angle, and The link establishment phase refers to the phase in which the laser emitting device uses the collimated laser beam to scan the optical communication environment to find the corresponding laser receiving device.

4. The laser emitting device according to claim 3, characterized in that: The adjustment lens is configured to be switched to the other of the first position and the second position during the signal transmission phase of the optical communication so that the collimated laser beam has the expected minimum divergence angle, and The signal transmission stage refers to the stage in which the laser emitting device and the laser receiving device perform signal transmission.

5. The laser emitting device according to claim 2, characterized in that: The lens parameters of the adjustment lens and the relative distance of the first position relative to the transmission optical fiber and the collimator are determined based on at least one of the following items: The expected maximum divergence angle, the expected minimum divergence angle, the beam radius of the laser beam, the collimator parameters of the collimator, or the distance between the transmission optical fiber and the collimator.

6. The laser emitting device according to claim 5, characterized in that: The lens parameters include at least one of the following items: the size of the adjusting lens, the surface shape of the adjusting lens, the curvature of the adjusting lens, the material of the adjusting lens, or the coating requirements of the adjusting lens.

7. The laser emitting device according to claim 5, characterized in that: The collimator comprises at least one collimator lens, and The collimator lens parameters include at least one of the following items: the size of each collimator lens in the at least one collimator lens, the material of each collimator lens in the at least one collimator lens, or the spacing between each collimator lens in the at least one collimator lens.

8. The laser emitting device according to claim 1, characterized in that: Also includes: a driver configured to drive the adjustment lens to move in a predetermined manner to switch between the first position and the second position, and The predetermined mode includes a linear movement mode or a rotational movement mode.

9. The laser emitting device according to claim 8, characterized in that: Also includes: The limiting component is configured to stop the adjusting lens when the adjusting lens is moved to the first position or the second position to prevent the adjusting lens from colliding with other components in the laser emitting device.

10. The laser emitting device according to any one of claims 1 to 9, characterized in that: The adjustment lens includes at least one of the following items: a plane lens or a curved lens.

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