Optical device coupling method and receiving optical device

Abstract

The invention relates to the technical field of optical fiber communication high-speed optical modules, and discloses an optical device coupling method and a receiving optical device. The method comprises the following steps: determining relative positions of an optical amplifier and a collimating lens in a Y direction according to a preset coupling judgment condition; determining the relative positions of the optical amplifier and the collimating lens in the X direction according to a preset coupling judgment condition; determining the relative positions of the optical amplifier and the collimating lens in the Z direction according to a preset coupling judgment condition; pre-fixing a collimating lens and a lens array based on the relative position and long and short wave indexes; and closing vacuum and recovering the suction nozzle to a safety position to finish coupling. The coupling logic is used for online coupling, adjusting and balancing long and short wave indexes of the optical device, the device yield and the device manufacturing efficiency can be improved, the device repair probability is reduced, the optical module transmission rate is improved, and the device integration degree is increased. The long and short wave yield of the manufactured device can reach more than 99%, device repair and material loss caused by poor long and short wave performance can be avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed optical modules for optical fiber communication, and particularly to an optical device coupling method and a receiving optical device. Background Art

[0002] Currently, for optical devices based on the wavelength division multiplexing free space structure, wave multiplexing and demultiplexing are basically achieved by Z-BLOCK or spatial diaphragm assembly. Such diaphragm-type MUX wavelength division multiplexers and DEMUX demultiplexers are both very sensitive to the optical incident angle. The 1dB insertion loss wavelength passband of the diaphragm will undergo an overall drift as the optical incident angle increases. The larger the typical incident angle, the more sensitive it is to the angle change. For example, ~0.15nm / 0.1° @ 8° incident angle and ~0.22nm / 0.1° @ 13.5° incident angle. That is, at an 8° incident angle, the drift rate of the wavelength passband is about 0.15nm / 0.1°, while at a 13.5° incident angle, the drift rate of the wavelength passband is about 0.22nm / 0.1°. This indicates that as the incident angle increases, the wavelength passband drift amount caused by the same angle change is larger.

[0003] In the ITU protocol, each channel has a corresponding wavelength range, such as λ±6.5nm@CWDM; λ±2.5nm@MWDM; λ±1.03nm@LANWDM. In the DEMUX demultiplexing optical device at the RX receiving end of the optical module, ITU requires that the change amount of the responsivity (sensitivity) of the optical device within the wavelength range is within 0.5 or 1dB. Generally, at the typical value wavelength, the responsivity and optical power can meet the requirements. However, similarly, when coupling, the incident angle of the laser beam in the current device relative to the diaphragm cannot be directly measured. Therefore, in the case of the upper or lower limit of the center wavelength line, the responsivity will change greatly, resulting in poor long and short wavelength responsivities of the device. Summary of the Invention

[0004] The main purpose of the present invention is to provide an optical device coupling method and a receiving optical device, aiming to solve at least one of the above technical problems.

[0005] To achieve the above purpose, the present invention provides an optical device coupling method, including:

[0006] Determining the relative position of the optical amplifier and the collimating lens in the Y direction according to a preset coupling determination condition;

[0007] Determining the relative position of the optical amplifier and the collimating lens in the X direction according to a preset coupling determination condition;

[0008] Determining the relative position of the optical amplifier and the collimating lens in the Z direction according to a preset coupling determination condition;

[0009] Pre-fixing the collimating lens and the lens array based on the relative position and the long and short wavelength indicators;

[0010] Turn off the vacuum and return the nozzle to the safe position to complete the coupling.

[0011] In some embodiments, determining the relative position of the optical amplifier and the collimating lens in the Y direction according to the preset coupling determination condition includes:

[0012] Power on the optical device to be coupled so that the N channels of the optical device to be coupled supply light simultaneously;

[0013] Move the collimating lens to the first initial position and couple the Nth channel of the optical device to be coupled to the optimal state; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path;

[0014] Move the collimating lens towards the optical amplifier by a preset simulation distance;

[0015] Couple the collimating lens to the first channel in the XZ plane to the optimal state, and record the position of the collimating lens as the first position;

[0016] Move the lens array to the second initial position and keep the collimating lens at the first position;

[0017] Couple the lens array to the optimal state in the XYZ directions;

[0018] Determine whether the coupling efficiency of the first channel and the Nth channel of the optical device to be coupled is greater than or equal to a preset efficiency threshold, and whether the 0.5dB flat region of the first channel and the Nth channel is greater than or equal to a preset flat region threshold;

[0019] If so, determine the relative position of the optical amplifier and the collimating lens in the Y direction.

[0020] In some embodiments, after determining whether the coupling efficiency of the first channel and the Nth channel of the optical device to be coupled is greater than or equal to a preset efficiency threshold, and whether the 0.5dB flat region of the first channel and the Nth channel is greater than or equal to a preset flat region threshold, it further includes:

[0021] If not, compare the flat region difference between the first channel and the Nth channel of the optical device to be coupled;

[0022] If the 0.5dB flat region of the first channel is less than the first threshold, move the collimating lens towards the optical amplifier by a first distance;

[0023] If the 0.5dB flat region of the Nth channel is less than the first threshold, move the collimating lens away from the optical amplifier by a first distance;

[0024] Return to the step of coupling the lens array to the optimal state in the XYZ directions.

[0025] In some embodiments, determining the relative position of the optical amplifier and the collimating lens in the X direction according to the preset coupling determination condition includes:

[0026] Couple the lens array on the XZ plane, calculate the common flat region of all channels, and set the lens array at the middle position of the common flat region;

[0027] Compare whether the long - wave and short - wave responsivity differences of the first channel to the Nth channel of the optical device to be coupled are all less than or equal to a preset difference threshold; where the first channel is the channel with the longest optical path, and the Nth channel is the channel with the shortest optical path;

[0028] If so, determine whether the width of the common flat region in the X direction is greater than or equal to a second threshold;

[0029] If so, determine the relative position of the optical amplifier and the collimating lens in the Y direction.

[0030] In some embodiments, after comparing whether the long - wave and short - wave responsivity differences of the first channel to the Nth channel of the optical device to be coupled are all less than or equal to the preset difference threshold, it further includes:

[0031] If not, determine that there are long - wave or short - wave defects in the channels of the optical device to be coupled;

[0032] If there is a long - wave defect, move the collimating lens a second distance in the negative X direction;

[0033] If there is a short - wave defect, move the collimating lens a second distance in the positive X direction;

[0034] Return to the step of coupling the lens array on the XZ plane, calculating the common flat region of all channels, and setting the lens array at the middle position of the common flat region.

[0035] In some embodiments, determining the relative position of the optical amplifier and the collimating lens in the Z direction according to the preset coupling determination condition includes:

[0036] Recouple the lens array in the Z direction, and obtain the phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; where the first channel is the channel with the longest optical path, and the Nth channel is the channel with the shortest optical path;

[0037] Determine whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to a third threshold;

[0038] If so, determine whether the responsivities of the first channel to the Nth channel meet the preset responsivity index;

[0039] If so, determine the relative position of the optical amplifier and the collimating lens in the Z direction.

[0040] In some embodiments, after determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold, it further includes:

[0041] If not, move the collimating lens upward in the Z direction by a third distance;

[0042] Recouple the lens array in the XYZ directions, and obtain the phase difference of the coupling curves of the first channel and the Nth channel of the optical device to be coupled;

[0043] Determine whether the phase of the first channel and the Nth channel in the Z direction decreases;

[0044] If so, return to the step of determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold;

[0045] If not, return the collimating lens to the position before moving the third distance in the Z direction, and move it downward in the Z direction by a third distance;

[0046] Recouple the lens array in the XYZ directions, and obtain the updated phase difference of the coupling curves of the first channel and the Nth channel of the optical device to be coupled;

[0047] Determine whether the phase of the first channel and the Nth channel in the Z direction decreases;

[0048] If so, return to the step of determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold;

[0049] If not, return the collimating lens to the position before moving the third distance in the Z direction, and obtain the RY angle according to the updated phase difference;

[0050] Rotate the lens array by the RY angle, and recouple the lens array in the XZ plane;

[0051] Determine whether the responsivities of the first channel to the Nth channel meet the preset responsivity index.

[0052] In some embodiments, the pre-fixing of the collimating lens and the lens array based on the relative position and the long-wave and short-wave indexes includes:

[0053] Based on the relative position, record the coupling positions and angles of the collimating lens and the lens array respectively;

[0054] Withdraw the collimating lens;

[0055] Apply glue at the coupling position of the collimating lens, and pre-fix the collimating lens to the glued position;

[0056] Re-couple the lens array in the YZ plane;

[0057] Determine whether the common flat region of the responsivities of the first to Nth channels of the optical device to be coupled is greater than or equal to a fourth threshold, and determine whether the long-wave and short-wave responsivity differences of the first to Nth channels are all less than or equal to a preset difference threshold;

[0058] If so, cure the collimating lens at the dispensing position;

[0059] Pre-fix the lens array.

[0060] In some embodiments, the pre-fixing the lens array includes:

[0061] Identify the lens array and move the lens array into the housing of the optical device to be coupled;

[0062] Couple the lens array to the optimal state in the XYZ directions, and calculate the common flat region and the phase difference of the coupling curve;

[0063] Determine whether the phase differences in the Y direction and the Z direction are both less than or equal to a fifth threshold;

[0064] If so, determine whether the common flat region of the first to Nth channels is greater than or equal to a sixth threshold, and determine whether the long-wave and short-wave responsivity differences of the first to Nth channels are all less than or equal to a preset difference threshold;

[0065] If so, record the coupling position, angle, and flat region value of the lens array;

[0066] Withdraw the lens array and dispense glue at the coupling position of the lens array, and pre-fix the lens array to the dispensing position;

[0067] Cure the lens array at the dispensing position.

[0068] In addition, to achieve the above object, the present invention also proposes a receiving optical device, which is obtained by coupling using the optical device coupling method described above.

[0069] The present invention provides an optical device coupling method, including: determining the relative position of an optical amplifier and a collimating lens in the Y direction according to a preset coupling determination condition; determining the relative position of the optical amplifier and the collimating lens in the X direction according to the preset coupling determination condition; determining the relative position of the optical amplifier and the collimating lens in the Z direction according to the preset coupling determination condition; pre-fixing the collimating lens and the lens array based on the relative position and the long-wave and short-wave indexes; closing the vacuum and restoring the nozzle to a safe position to complete the coupling. The coupling logic described in the method of the present invention is used for online coupling adjustment to balance the long-wave and short-wave indexes of optical devices, which can improve the device yield and device manufacturing efficiency, reduce the device repair probability, thereby improving the transmission rate of the optical module and increasing the device integration. The long-wave and short-wave yield of the device manufactured according to the automatic coupling program of the method of the present invention can reach more than 99%, which can eliminate device repair and material loss caused by poor long-wave and short-wave performance and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a schematic flowchart of an embodiment of the optical device coupling method of the present invention;

[0071] Figure 2 It is a schematic structural diagram of a 4-channel RX-DEMUX optical device related to the embodiment scheme of the present invention;

[0072] Figure 3 It is a schematic flowchart of determining the relative position in the Y direction of an SOA and a Clens related to the embodiment scheme of the present invention;

[0073] Figure 4 It is a schematic flowchart of determining the relative position in the X direction of an SOA and a Clens related to the embodiment scheme of the present invention;

[0074] Figure 5 It is a schematic flowchart of determining the relative position in the Z direction of an SOA and a Clens related to the embodiment scheme of the present invention;

[0075] Figure 6 It is a schematic flowchart of pre-fixing the position of a Clens related to the embodiment scheme of the present invention;

[0076] Figure 7 It is a schematic flowchart of pre-fixing the position of a LensA related to the embodiment scheme of the present invention;

[0077] Figure 8 It is a schematic structural diagram of a LAN WDM RX optical device related to the embodiment scheme of the present invention;

[0078] Figure 9 It is another schematic structural diagram of a LAN WDM RX optical device related to the embodiment scheme of the present invention;

[0079] Figure 10 The structural schematic diagram of an electronic device for the hardware operating environment involved in the solution of the embodiment of the present invention.

[0080] The realization of the object of the present invention, functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0081] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0082] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0083] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0084] The present invention provides an optical device coupling method and a receiving optical device.

[0085] An embodiment of the present invention provides an optical device coupling method, referring to Figure 1 , Figure 1 which is a schematic flowchart of an embodiment of the optical device coupling method of the present invention.

[0086] As Figure 1 shown, the optical device coupling method includes:

[0087] Step S100: Determine the relative position of the optical amplifier and the collimating lens in the Y direction according to a preset coupling determination condition;

[0088] Step S200: Determine the relative position of the optical amplifier and the collimating lens in the X direction according to a preset coupling determination condition;

[0089] Step S300: Determine the relative position of the optical amplifier and the collimating lens in the Z direction according to a preset coupling determination condition;

[0090] Step S400: Preliminarily fix the collimating lens and the lens array based on the relative position and the long-wave and short-wave indexes;

[0091] Step S500: Turn off the vacuum and restore the nozzle to the safe position to complete the coupling.

[0092] It should be noted that the execution subject in this embodiment can be an electronic device, which can be an automatic coupling device with the function of realizing the automatic coupling logic of the optical device coupling method, or other devices that can realize the same or similar functions. This embodiment does not limit this. In this embodiment, an automatic coupling device is taken as an example for illustration. This device has the function of controlling the collimating lens Clens to perform XYZ and RZ movements, and controlling the lens array LensArray to perform XYZ and RZ, RY movements. By precisely controlling these movements, precise alignment and coupling between the collimating lens Clens and the lens array LensArray and other optical elements can be achieved, ensuring that optical signals can be efficiently transmitted between various optical elements.

[0093] It can be understood that this embodiment takes Figure 2 the 4-channel RX-DEMUX optical device shown as an example to illustrate the optical device coupling method. As Figure 2 shown, the 4-channel RX-DEMUX optical device includes a MUX / DEMUX component, a Clens (collimating lens), a light source, a receiving PD (photodetector) / APD (avalanche photodiode), a prism, and a Lens Array. The device for realizing the automatic coupling logic is a device with the function of controlling the Clens to perform XYZ and RZ movements and controlling the Lens Array to perform XYZ and RZ, RY movements. Before implementing the automatic coupling, other components in the optical device to be coupled have been adhesively fixed. The X, Y, and Z axes are as Figure 2 shown, and RZ and RY respectively refer to rotations around the X and Z axes; Clens represents the abbreviation of the Collimation Lens beside the SOA (semiconductor optical amplifier), and LensA represents the abbreviation of LensArray.

[0094] In one embodiment, determining the relative position of the optical amplifier and the collimating lens in the Y direction according to the preset coupling determination condition includes: powering on the optical device to be coupled so that N channels of the optical device to be coupled supply light simultaneously; moving the collimating lens to the first initial position and coupling the Nth channel of the optical device to be coupled to the optimal state; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path; moving the collimating lens towards the optical amplifier by a preset simulation distance; coupling the collimating lens to the first channel to the optimal state in the XZ plane and recording the position of the collimating lens as the first position; moving the lens array to the second initial position and keeping the collimating lens at the first position; coupling the lens array to the optimal state in the XYZ directions; determining whether the coupling efficiencies of the first channel and the Nth channel of the optical device to be coupled are greater than or equal to the preset efficiency threshold, and whether the 0.5 dB flat region of the first channel and the Nth channel is greater than or equal to the preset flat region threshold; if so, determining the relative position of the optical amplifier and the collimating lens in the Y direction.

[0095] Exemplarily, the coupling procedure of the optical device coupling method in this embodiment mainly determines the relative positions of the optical amplifier SOA and the collimating lens Clens in the X, Y, and Z directions through preset coupling determination conditions such as pre-coupling to initially find light, determining the phase difference of the edge channels, and reducing the phase difference, and then processes such as pre-fixing the collimating lens Clens and pre-fixing the lens array LensArray.

[0096] Specifically, this embodiment takes Figure 2 the 4-channel RX-DEMUX optical device shown as an example for illustration. As Figure 3As shown in the figure, step a) determines the relative position of the optical amplifier SOA and the collimating lens Clens in the Y direction: power on the optical device to be coupled, and supply light to the four channels (CH1 to CH4) of the optical device to be coupled simultaneously; move the collimating lens Clens to the first initial position P0 through the nozzle 1 of the automatic coupling device, and couple the fourth channel (CH4 is the channel with the shortest optical path) to the optimal state; move the collimating lens Clens towards the optical amplifier SOA by a preset simulation distance β um; couple the collimating lens Clens in the XZ plane to reach the optimal state of the first channel CH1, and record the position of the collimating lens Clens as the first position P1 at this time; move the lens array LensA to the second initial position A0 through the nozzle 2 of the automatic coupling device, and keep the collimating lens Clens stationary, that is, the collimating lens Clens still remains at the first position P1; couple the lens array LensA to the optimal state in the XYZ directions (the lens array LensA stops at the balanced position of the four channels), and the collimating lens Clens still remains at the first position P1; determine whether the coupling efficiency of the first channel CH1 and the fourth channel CH4 is greater than or equal to a preset efficiency threshold, such as 80%, and whether the 0.5 dB flat region of the first channel CH1 and the fourth channel CH4 is greater than or equal to a preset flat region threshold α um, such as 10 um; if so, the Py position of the collimating lens Clens, that is, the relative position of Clens in the Y direction, is determined.

[0097] It should be noted that the responsivity of the optical channel changes with the change of the optical wavelength. Usually, a responsivity-wavelength curve is plotted with the wavelength as the horizontal axis and the responsivity as the vertical axis. Here, the "0.5 dB flat region" refers to the wavelength interval width corresponding to the responsivity change within the range of 0.5 dB in this responsivity-wavelength curve. dB is commonly used in optical communication to measure the relative change of optical power or responsivity. In practical applications, it is desired that the optical channel can work stably within a certain wavelength range, that is, the responsivity does not fluctuate too much. A wider 0.5 dB flat region indicates that the optical channel responds more stably to optical signals with different wavelengths within this wavelength interval, and the transmission quality of the optical signal can be better guaranteed. If the flat region is too narrow, then when the wavelength of the optical signal changes slightly, the responsivity may change greatly, thus affecting the reception and processing of the optical signal.

[0098] Exemplarily, the requirement that the 0.5dB flat area is ≥ αum, where the α value can be calculated based on the size of the PD photosensitive surface, the surface parameters of LensA, the material and other parameters. In this embodiment, the requirement that the 0.5dB flat area of the first channel CH1 and the fourth channel CH4 during the optical device coupling process is ≥ 10um is to ensure that the fluctuation of the responsivity of these two channels does not exceed 0.5dB within a wavelength range of at least 10um. This ensures that within this wavelength range, the optical device can have a relatively consistent response to optical signals of different wavelengths, improves the stability and reliability of the optical communication system, and reduces signal distortion and transmission errors caused by factors such as wavelength drift.

[0099] In one example, the collimating lens Clens is moved to a first initial position P0, and the lens array LensA is moved to a second initial position A0. Here, the first initial position P0 and the second initial position A0 are approximate positions predetermined based on optical design and experience, and this embodiment does not impose any limitation on this. By accurately placing the collimating lens Clens or the lens array LensA at the corresponding initial position through a suction nozzle, a basis can be provided for subsequent precise coupling, thereby reducing the adjustment range during the coupling process and improving the coupling efficiency.

[0100] In one example, the first channel CH1 (or the fourth channel CH4) is coupled to the best state: the position and posture of the optical element can be controlled by the automatic coupling device, while monitoring the optical power, responsivity and other performance indicators of the first channel CH1 (or the fourth channel CH4). The position of the element is continuously adjusted according to the monitoring results until the performance indicators of the first channel CH1 (or the fourth channel CH4) reach the best state, that is, the transmission efficiency of the optical signal is the highest and the loss is the lowest. This process may require multiple iterations and fine-tuning to find the optimal coupling position.

[0101] In one example, the collimating lens Clens is close to the optical amplifier SOA, and the β value in the preset simulation distance βum is calculated according to the surface parameters and materials of the collimating lens Clens. For example, a model without LensA is established in the optical simulation software, and the distance L1 between the collimating lens Clens and the optical amplifier SOA when the coupling of the fourth channel CH4 is optimal is calculated. The lens array LensA is added in the simulation, and the distance between the optical amplifier SOA and the collimating lens Clens and the position of the lens array LensA are optimized, so that CH1 to CH4 can achieve optimal coupling. At this time, the distance between the optical amplifier SOA and the collimating lens Clens is L2, and β=L1-L2; wherein CH1 is the channel with the longest optical path, and CH4 is the channel with the shortest optical path.

[0102] In one embodiment, after determining whether the coupling efficiency of the first channel and the Nth channel of the optical device to be coupled is greater than or equal to a preset efficiency threshold, and whether the 0.5 dB flat region of the first channel and the Nth channel is greater than or equal to a preset flat region threshold, it further includes: if not, comparing the flat region difference between the first channel and the Nth channel of the optical device to be coupled; if the 0.5 dB flat region of the first channel is less than the first threshold, moving the collimating lens a first distance in the direction close to the optical amplifier; if the 0.5 dB flat region of the Nth channel is less than the first threshold, moving the collimating lens a first distance in the direction away from the optical amplifier; returning to the step of coupling the lens array to the optimal state in the XYZ directions.

[0103] Specifically, as Figure 3 shown, if it is determined that the coupling efficiency of the first channel CH1 and the fourth channel CH4 is less than the preset efficiency threshold, for example, 80%, or it is determined that the 0.5 dB flat region of the first channel CH1 and the fourth channel CH4 is less than the preset flat region threshold α um, for example, 10 um, adjustment is required; comparing the flat region difference between AZ_CH1 and AZ_CH4; if the 0.5 dB flat region of LensAZ_CH1 is less than the first threshold, for example, 10 um, moving the collimating lens Clens a first distance, for example, 3 um, in the direction close to the optical amplifier SOA; if the 0.5 dB flat region of LensAZ_CH4 is less than the first threshold, for example, 10 um, moving the collimating lens Clens a first distance, for example, 3 um, in the direction away from the optical amplifier SOA; then returning to the step of coupling the lens array LensA to the optimal state in the XYZ directions. It should be noted that if the number of times the coupling efficiency and the flat region value are judged to be no is too many, for example, greater than or equal to three times, it indicates coupling failure and the program terminates.

[0104] In one embodiment, determining the relative position of the optical amplifier and the collimating lens in the X direction according to a preset coupling determination condition includes: coupling the lens array on the XZ plane and calculating the common flat region of all channels, and setting the lens array at the middle position of the common flat region; comparing whether the difference in the long-wave and short-wave responsivities of the first channel to the Nth channel of the optical device to be coupled is less than or equal to a preset difference threshold; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path; if so, determining whether the width of the common flat region in the X direction is greater than or equal to a second threshold; if so, determining the relative position of the optical amplifier and the collimating lens in the Y direction.

[0105] Specifically, as Figure 4As shown, step b) determines the relative position of the semiconductor optical amplifier (SOA) and the collimating lens (Clens) in the X direction: couple the lens array (LensA) in the XZ plane, calculate the 0.5 dB flat region of each channel, determine the common flat region according to the intersection of the 0.5 dB flat regions of all channels, and stop the lens array (LensA) at the middle position of the common flat region; compare whether the difference in long - and short - wavelength responsivities between the first channel (CH1) to the fourth channel (CH4) is less than or equal to a preset difference threshold, such as 0.5 dB; if so, determine whether the width of the 0.5 dB common flat region in the X direction is greater than or equal to a second threshold, such as 3 μm; if so, the Px position of the collimating lens (Clens) is determined, that is, the relative position of the optical amplifier and the collimating lens in the X direction. If it is determined that the width of the 0.5 dB common flat region in the X direction is less than the second threshold, such as 3 μm, it indicates that the coupling fails and the program terminates.

[0106] In one example, in a multi - channel optical device, each channel has its own responsivity - wavelength curve and corresponding 0.5 dB flat region. The common flat region refers to the intersection of the 0.5 dB flat regions of all channels, that is, the responsivity change of all channels within this wavelength range does not exceed 0.5 dB. By calculating the common flat region, a wavelength range can be found such that the optical device can have a relatively stable and consistent response to the optical signals of each channel within this range, thereby improving the reliability and stability of the optical communication system. Exemplarily, the responsivity - wavelength curves of each channel can be measured by using equipment such as a spectrum analyzer, and then the overlapping part of the 0.5 dB flat regions of all channels can be found through data analysis software to determine the start and end wavelengths of the common flat region.

[0107] In one example, adjusting the lens array (LensA) to the middle position of the common flat region can make the response of the optical device to the optical signal in the common flat region the most stable. Because in the middle of the common flat region, the responsivity change of each channel is relatively small, which can better ensure the transmission quality of the optical signal at different wavelengths and reduce signal distortion and error codes caused by factors such as wavelength drift. Exemplarily, after calculating the start wavelength and end wavelength of the common flat region, calculate the wavelength at the middle position according to the start wavelength and end wavelength, and then, according to the pre - established relationship model between the wavelength and the position of the lens array, adjust the lens array (LensA) to the position corresponding to the wavelength at the middle position. In actual operation, it may be necessary to combine a feedback control system to continuously fine - tune the position of the lens array by real - time monitoring the responsivity and wavelength of the optical signal to ensure that it accurately stops at the middle position of the common flat region.

[0108] In one embodiment, after comparing whether the long - wave and short - wave responsivity differences of the first channel to the Nth channel of the optical device to be coupled are all less than or equal to a preset difference threshold, it further includes: if not, determining that there is a long - wave or short - wave defect in the channel of the optical device to be coupled; if there is a long - wave defect, moving the collimating lens along the negative X - direction by a second distance; if there is a short - wave defect, moving the collimating lens along the positive X - direction by a second distance; returning to the step of coupling the lens array in the XZ plane, calculating the common flat area of all channels, and setting the lens array at the middle position of the common flat area.

[0109] Specifically, as Figure 4 shown, if it is determined that the long - wave and short - wave responsivity differences of the first channel to the fourth channel of the optical device to be coupled are greater than a preset difference threshold, for example, 0.5 dB, it indicates that there is a long - wave and short - wave defect, and it is necessary to determine whether there is a long - wave defect or a short - wave defect in the channel; if there is a long - wave defect, moving the collimating lens Clens along the negative X - direction by a second distance, for example, 2 μm; if there is a short - wave defect, moving the collimating lens Clens along the positive X - direction by a second distance, for example, 2 μm; returning again to the step of coupling the lens array in the XZ plane, calculating the common flat area of all channels, and setting the lens array at the middle position of the common flat area. Here, if the number of times the long - wave and short - wave judgment is negative is too many, for example, greater than or equal to three times, it indicates that the coupling fails and the program terminates.

[0110] Exemplarily, "long - wave defect or short - wave defect" can be expressed as: the responsivity at the typical incident wavelength λ1 of CH1 is R1, the responsivity at the long - wave incident wavelength λ1 + 1.03 nm (taking the LWDM wavelength as an example) is R2, and the responsivity at the short - wave incident wavelength λ1 - 1.03 nm (taking the LWDM wavelength as an example) is R3. When |10 * log10(R2 / R1)| > 0.5 dB (absolute value), it is a long - wave defect, and when |10 * log10(R3 / R1)| > 0.5 dB (absolute value), it is a short - wave defect. If any channel has a long - wave or short - wave defect, it is a long - wave and short - wave defect.

[0111] It can be understood that in the CH1 channel, the responsivity at the typical incident wavelength λ1 is R1, which can be regarded as the reference responsivity of this channel at the standard wavelength for subsequent comparison with the responsivities at different wavelengths. The typical incident wavelength λ1 is usually the central wavelength determined according to the design and application requirements of the optical communication system. The performance of the optical device at this wavelength is optimized, and its responsivity is an important reference value for the performance of this channel. Taking the LWDM (Local Area Network Wavelength Division Multiplexing) wavelength as an example, the long - wave and short - wave offset wavelengths are used to evaluate the response characteristics of the optical device at different wavelengths near the typical wavelength. If any channel (such as CH1) has a long - wave or short - wave defect, it is determined that this channel has a long - wave and short - wave defect.

[0112] In one embodiment, determining the relative position of the optical amplifier and the collimating lens in the Z direction according to a preset coupling determination condition includes: recoupling the lens array in the Z direction, and obtaining the phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; wherein the first channel is the channel with the longest optical path, and the Nth channel is the channel with the shortest optical path; determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to a third threshold; if so, determining whether the responsivities of the first channel to the Nth channel meet the preset responsivity index; if so, determining the relative position of the optical amplifier and the collimating lens in the Z direction.

[0113] Specifically, as Figure 5 shown, step c) determines the relative position of the optical amplifier SOA and the collimating lens Clens in the Z direction: recouple the lens array LensA in the Z direction, and observe the phase difference between the coupling curves of the first channel CH1 and the fourth channel CH4 of the optical device to be coupled; determine whether the common flat region of the first channel CH1 and the fourth channel CH4 in the Z direction is greater than or equal to a third threshold, such as 5um; if so, determine whether the responsivity values of the first channel CH1 and the fourth channel CH4 meet the preset responsivity index; if so, determine the Pz position of the collimating lens Clens, that is, the relative position of the optical amplifier and the collimating lens in the Z direction. Here, the preset responsivity index can be the product specification requirements of the optical device, which are set according to the actual situation, and this embodiment does not limit this.

[0114] In one embodiment, after determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold, it further includes: if not, moving the collimating lens upward in the Z direction by a third distance; recoupling the lens array in the XYZ directions, and obtaining the phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; determining whether the phase of the first channel and the Nth channel in the Z direction decreases; if so, returning to the step of determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold; if not, returning the collimating lens to the position before moving the third distance in the Z direction, and moving it downward in the Z direction by a third distance; recoupling the lens array in the XYZ directions, and obtaining the updated phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; determining whether the phase of the first channel and the Nth channel in the Z direction decreases; if so, returning to the step of determining whether the common flat region of the first channel and the Nth channel in the Z direction is greater than or equal to the third threshold; if not, returning the collimating lens to the position before moving the third distance in the Z direction, obtaining the RY angle according to the updated phase difference; rotating the lens array by the RY angle, and recoupling the lens array in the XZ plane; determining whether the responsivities of the first channel to the Nth channel meet the preset responsivity index.

[0115] Specifically, as Figure 5 shown, if it is determined that the common flat area of the first channel CH1 and the fourth channel CH4 in the Z direction is less than a third threshold value, such as 5 um, the collimating lens Clens is moved upward in the Z direction by a third distance, such as 3 um; the lens array LensA is re-coupled in the three directions of X, Y, and Z, and the phase difference of the coupling curves of the first channel CH1 and the fourth channel CH4 is observed; it is determined whether the phases of the first channel CH1 and the fourth channel CH4 in the Z direction are reduced; if so, the step of determining whether the common flat area of the first channel and the fourth channel in the Z direction is greater than or equal to the third threshold value, such as 5 um, is returned; if not, the collimating lens Clens is returned to its original position in the Z direction, that is, the position before moving upward by 3 um in the Z direction, and then moved downward in the Z direction by a third distance, such as 3 um; the lens array LensA is re-coupled in the X, Y, and Z directions, and the phase difference of the coupling curves of the first channel CH1 and the fourth channel CH4 at this time is observed, that is, the phase difference is updated; it is determined whether the phases of the first channel CH1 and the fourth channel CH4 in the Z direction are reduced; if so, the step of determining whether the common flat area of the first channel and the fourth channel in the Z direction is greater than or equal to the third threshold value, such as 5 um, is returned; if not, the collimating lens Clens is returned to its original position in the Z direction, that is, the position before moving downward by 3 um in the Z direction; it is explained that the phase difference between the first channel CH1 and the fourth channel CH4 in the Z direction is not caused by the error of the collimating lens Clens. At this time, the RY angle can be determined according to the phase difference, that is, the RY angle is obtained according to the updated phase difference; the RY angle of the lens array LensA is rotated, and the lens array LensA is re-coupled in the X and Z directions; it is determined whether the responsivities of the first channel CH1 to the fourth channel CH4 meet the preset responsivity index; if they meet, the Pz position of the collimating lens Clens is determined, that is, the relative position of the optical amplifier and the collimating lens in the Z direction; if they do not meet, it indicates that the coupling fails and the program terminates.

[0116] It can be understood that in a multi-channel optical communication system such as wavelength division multiplexing, there may be phase differences in the optical signals of different channels during transmission. The edge channels are usually crucial for the performance of the entire system, and their phase differences reflect the relative positions between optical elements and the matching degree of the optical paths. If the phase differences of the edge channels are too large, problems such as signal interference and crosstalk will occur, affecting the quality of optical communication. In this embodiment, devices such as interferometers can be used to measure the phases of the optical signals of the edge channels (such as the first channel CH1 and the fourth channel CH4), calculate the phase difference of the coupling curves, and perform subsequent position adjustments of optical elements based on this phase difference information.

[0117] In one embodiment, pre-fixing the collimating lens and the lens array based on the relative position and the long and short wavelength indicators includes: respectively recording the coupling positions and angles of the collimating lens and the lens array based on the relative position; withdrawing the collimating lens; dispensing glue at the coupling position of the collimating lens, and pre-fixing the collimating lens to the glue dispensing position; re-coupling the lens array in the YZ plane; judging whether the common flat region of the responsivities of the first channel to the Nth channel of the optical device to be coupled is greater than or equal to a fourth threshold, and judging whether the long and short wavelength responsivity differences of the first channel to the Nth channel are all less than or equal to a preset difference threshold; if so, curing the collimating lens at the glue dispensing position; pre-fixing the lens array.

[0118] Specifically, as Figure 6 shown, step d) pre-fixing the position of the collimating lens Clens: based on the determined relative position, the position and angle of the lens array LensA can be recorded, and the position and angle of the collimating lens Clens can be recorded; withdrawing the collimating lens Clens; dispensing glue at the coupling position of the collimating lens Clens, and the collimating lens Clens returns to the coupling recording position and is pre-fixed to the glue dispensing position; re-coupling the lens array LensA in the Y and Z directions; judging whether the common flat region of the responsivities of the first channel CH1 to the fourth channel CH4 is greater than or equal to a fourth threshold, for example, 5um, and performing long and short wavelength judgment on the first channel CH1 to the fourth channel CH4; if all the above judgment conditions are satisfied, then UV cure (ultraviolet cure) the collimating lens Clens; if any of the above judgment conditions is not satisfied, it means that the coupling fails and the program terminates.

[0119] It can be understood that performing long and short wavelength judgment on the first channel CH1 to the fourth channel CH4 can be: judging whether the long and short wavelength responsivity differences of the first channel to the Nth channel are all less than or equal to a preset difference threshold. The specific judgment details of "long wave defect or short wave defect" in step b) can be referred to for this step, which will not be elaborated here.

[0120] In one embodiment, pre-fixing the lens array LensA includes: identifying the lens array and moving the lens array into the housing of the optical device to be coupled; coupling the lens array to the optimal state in the XYZ directions, and calculating the common flat region and the phase difference of the coupling curve; judging whether the phase differences in the Y direction and the Z direction are both less than or equal to a fifth threshold; if so, judging whether the common flat region of the first channel to the Nth channel is greater than or equal to a sixth threshold, and judging whether the long and short wavelength responsivity differences of the first channel to the Nth channel are all less than or equal to a preset difference threshold; if so, recording the coupling position, angle and flat region value of the lens array; withdrawing the lens array and dispensing glue at the coupling position of the lens array, and pre-fixing the lens array to the glue dispensing position; curing the lens array at the glue dispensing position.

[0121] Exemplarily, after the collimating lens Clens is pre-cured, the coupling and pre-fixing of LensA are carried out in step e) in the following manner, and finally the coupling is completed.

[0122] Specifically, as Figure 7 shown, in step e), the position of LensA is pre-fixed: identify and pick up the lens array LensA with a nozzle and place it in a box (such as the housing box shown in Figure 8 ); the lens array LensA is coupled to the best in the XYZ directions, the common flat area is calculated, and the phase difference is calculated; it is judged whether the phase differences in the Y direction and the Z direction are both less than or equal to a fifth threshold value, for example, 5 um; if so, it is judged whether the common flat area of the responsivities of the first channel CH1 to the fourth channel CH4 is greater than or equal to a sixth threshold value, for example, 5 um, and the long-wave and short-wave judgments are made on the first channel CH1 to the fourth channel CH4; if all the above judgment conditions are satisfied, the angle, position, and flat area value of the lens array LensA are recorded; the lens array LensA is withdrawn and glue is applied at the coupling position of the lens array LensA, and the lens array LensA returns to the coupling position; UV curing. The vacuum is turned off and the nozzle is in the safe position; the sample is taken off to complete the coupling.

[0123] It can be understood that the long-wave and short-wave judgments on the first channel CH1 to the fourth channel CH4 can be: judging whether the differences in the long-wave and short-wave responsivities of the first channel to the Nth channel are all less than or equal to a preset difference threshold value. The specific judgment details of "long-wave defect or short-wave defect" in step b) can be referred to for this step, and will not be elaborated here.

[0124] It should be noted that the optical device coupling method will be described below in combination with two specific optical module embodiments. In Embodiment 1, a LANWDM RX optical device used in an ultra-long-distance transmission optical module, in which an optical amplifier (SOA) is required. After the optical device is completed by patch and pin coupling, the high yield and efficient coupling of the collimating lens Clens and the lens array LensA can be realized by referring to the coupling logic of steps a) to e), avoiding the generation of long-wave and short-wave defects and greatly improving the device manufacturing yield and efficiency. In Embodiment 2, as Figure 8 and Figure 9 shown, in a long-distance transmission optical module, the LAN WDM RX optical device used mainly includes a pin assembly, an adjusting ring, a BOX, a DMUEX, a LensArray, a PD, and a Prism. According to the automatic coupling logic of reference steps a) to e), the efficient coupling of Clens and LensA can also be realized, Figure 8 and Figure 9The structure shown is similar to that of Embodiment 1. In this structure, the collimating lens Clens is fixed in the BOX housing, and components such as DEMUX, Prism, and PD are passively attached in the BOX. The BOX is fixed, and the coupling pin assembly and LensArray need to be coupled. The coupling logic is similar to that of Embodiment 1. When coupling, first determine the relative position of the pin assembly housing (Clens), and then determine the position of Lens A.

[0125] It can be understood that various thresholds involved in this embodiment, such as the preset efficiency threshold, the first threshold, etc., can be set and adjusted according to the actual situation. This embodiment does not limit the specific values or value ranges of the thresholds.

[0126] This embodiment provides an optical device coupling method, including: determining the relative position of the optical amplifier and the collimating lens in the Y direction according to the preset coupling determination condition; determining the relative position of the optical amplifier and the collimating lens in the X direction according to the preset coupling determination condition; determining the relative position of the optical amplifier and the collimating lens in the Z direction according to the preset coupling determination condition; pre-fixing the collimating lens and the lens array based on the relative position and the long-wave and short-wave indicators; closing the vacuum and restoring the nozzle to the safe position to complete the coupling. The coupling logic described in the method of this embodiment is used to online couple and adjust the long-wave and short-wave indicators of the optical device, which can improve the device yield and device manufacturing efficiency, reduce the device repair probability, thereby improving the transmission rate of the optical module and increasing the device integration. The long-wave and short-wave yield of the device manufactured according to the automatic coupling program of the method of this embodiment can reach more than 99%, which can eliminate device repair and material loss caused by poor long-wave and short-wave performance and improve production efficiency.

[0127] In addition, an embodiment of the present invention also proposes a storage medium, on which an optical device coupling program is stored. When the optical device coupling program is executed by a processor, the steps of the optical device coupling method as described above are implemented.

[0128] An embodiment of the present invention also proposes a receiving optical device, which is coupled by using the optical device coupling method as described above. It should be noted that the technical details not described in detail in this embodiment of the receiving optical device can be referred to the application of the optical device coupling method provided in any embodiment of the present invention, which will not be elaborated here.

[0129] Refer to Figure 10 , Figure 10 which is a schematic structural diagram of an electronic device for the hardware operating environment involved in the solution of the embodiment of the present invention.

[0130] Such as Figure 10As shown in the figure, the electronic device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to implement the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed Random Access Memory (RAM memory), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0131] Those skilled in the art can understand that Figure 10 the structure shown in the figure does not constitute a limitation on the electronic device, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0132] As Figure 10 shown, the memory 1005, as a storage medium, may include an operating system, a network communication module, a user interface module, and an optical device coupling program.

[0133] In Figure 10 the electronic device shown in the figure, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the electronic device of the present invention may be arranged in the electronic device. The electronic device calls the optical device coupling program stored in the memory 1005 through the processor 1001 and executes the optical device coupling method provided by the embodiments of the present invention.

[0134] Exemplarily, the electronic device may be an automatic coupling device. The coupling device includes, but is not limited to: a light source (for providing a coupling light source for the device), a power supply (for supplying power to the device), a fixture (for clamping the device), a nozzle (for adsorbing or clamping components such as a lens or a pin), a motion unit (a motion axis for driving lens coupling), a computer (software carrying coupling logic for controlling external devices such as the power supply, the light source, and the motion unit), and a display (for displaying coupling results and coupling curves, and displaying the states of each device).

[0135] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0136] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and there is no limitation here.

[0137] In addition, it should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. Without more limitations, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0138] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0139] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory (ROM) / RAM, magnetic disk, optical disk), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0140] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is equally included in the patent protection scope of the present invention.

Claims

1. An optical device coupling method, characterized in that, Including: Determine the relative position of the optical amplifier and the collimating lens in the Y direction according to the preset coupling determination condition; Determine the relative position of the optical amplifier and the collimating lens in the X direction according to the preset coupling determination condition; Determine the relative position of the optical amplifier and the collimating lens in the Z direction according to the preset coupling determination condition; Pre-fix the collimating lens and the lens array based on the relative position and the long-wave and short-wave indexes; Close the vacuum and restore the nozzle to the safe position to complete the coupling.

2. The method according to claim 1, characterized in that, The determining the relative position of the optical amplifier and the collimating lens in the Y direction according to the preset coupling determination condition includes: Power on the optical device to be coupled so that N channels of the optical device to be coupled supply light simultaneously; Move the collimating lens to the first initial position and couple the Nth channel of the optical device to be coupled to the optimal state; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path; Move the collimating lens towards the optical amplifier by a preset simulation distance; Couple the collimating lens to the first channel in the XZ plane to reach the optimal state, and record the position of the collimating lens as the first position; Move the lens array to the second initial position and keep the collimating lens at the first position; Couple the lens array to the optimal state in the XYZ direction; Judge whether the coupling efficiency of the first channel and the Nth channel of the optical device to be coupled is greater than or equal to the preset efficiency threshold, and whether the 0.5dB flat zone of the first channel and the Nth channel is greater than or equal to the preset flat zone threshold; If so, determine the relative position of the optical amplifier and the collimating lens in the Y direction.

3. The method according to claim 2, wherein After the judging whether the coupling efficiency of the first channel and the Nth channel of the optical device to be coupled is greater than or equal to the preset efficiency threshold, and whether the 0.5dB flat zone of the first channel and the Nth channel is greater than or equal to the preset flat zone threshold, it further includes: If not, compare the flat zone difference between the first channel and the Nth channel of the optical device to be coupled; If the 0.5dB flat zone of the first channel is less than the first threshold, move the collimating lens towards the optical amplifier by the first distance; If the 0.5dB flat zone of the Nth channel is less than the first threshold, move the collimating lens away from the optical amplifier by the first distance; Return to the step of coupling the lens array to the optimal state in the XYZ direction.

4. The method according to claim 1, wherein The determining the relative position of the optical amplifier and the collimating lens in the X direction according to the preset coupling determination condition includes: Couple the lens array in the XZ plane and calculate the common flat zone of all channels, and set the lens array at the middle position of the common flat zone; Compare whether the difference in the long-wave and short-wave responsivities of the first channel to the Nth channel of the optical device to be coupled is less than or equal to the preset difference threshold; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path; If so, judge whether the width of the common flat zone in the X direction is greater than or equal to the second threshold; If so, determine the relative position of the optical amplifier and the collimating lens in the Y direction.

5. The method according to claim 4, wherein After the comparing whether the difference in the long-wave and short-wave responsivities of the first channel to the Nth channel of the optical device to be coupled is less than or equal to the preset difference threshold, it further includes: If not, then determine whether there is a long - wave or short - wave defect in the channels of the optical device to be coupled; If there is a long - wave defect, move the collimating lens in the negative X - direction by a second distance; If there is a short - wave defect, move the collimating lens in the positive X - direction by a second distance; Return to the step of coupling the lens array in the XZ plane, calculate the common flat area of all channels, and set the lens array at the middle position of the common flat area.

6. The method according to claim 1, characterized in that The determining the relative positions of the optical amplifier and the collimating lens in the Z - direction according to the preset coupling determination conditions includes: Recouple the lens array in the Z - direction and obtain the phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; where the first channel is the channel with the longest optical path and the Nth channel is the channel with the shortest optical path; Judge whether the common flat area of the first channel and the Nth channel in the Z - direction is greater than or equal to a third threshold; If so, then judge whether the responsivities of the first channel to the Nth channel meet the preset responsivity index; If so, determine the relative positions of the optical amplifier and the collimating lens in the Z - direction.

7. The method according to claim 6, wherein After judging whether the common flat area of the first channel and the Nth channel in the Z - direction is greater than or equal to the third threshold, it further includes: If not, move the collimating lens upward in the Z - direction by a third distance; Recouple the lens array in the XYZ directions and obtain the phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; Judge whether the phases of the first channel and the Nth channel in the Z - direction decrease; If so, return to the step of judging whether the common flat area of the first channel and the Nth channel in the Z - direction is greater than or equal to the third threshold; If not, return the collimating lens to the position before moving the third distance in the Z - direction and move it downward in the Z - direction by a third distance; Recouple the lens array in the XYZ directions and obtain the updated phase difference between the coupling curves of the first channel and the Nth channel of the optical device to be coupled; Judge whether the phases of the first channel and the Nth channel in the Z - direction decrease; If so, return to the step of judging whether the common flat area of the first channel and the Nth channel in the Z - direction is greater than or equal to the third threshold; If not, return the collimating lens to the position before moving the third distance in the Z - direction, and obtain the RY angle according to the updated phase difference; Rotate the lens array by the RY angle and recouple the lens array in the XZ plane; Judge whether the responsivities of the first channel to the Nth channel meet the preset responsivity index.

8. The method according to claim 1, wherein The pre - fixing the collimating lens and the lens array based on the relative positions and the long - and short - wave indexes includes: Based on the relative positions, respectively record the coupling positions and angles of the collimating lens and the lens array; Withdraw the collimating lens; Apply glue at the coupling position of the collimating lens and pre - fix the collimating lens to the glued position; Recouple the lens array in the YZ plane; Judge whether the common flat area of the responsivities of the first channel to the Nth channel of the optical device to be coupled is greater than or equal to a fourth threshold, and judge whether the differences between the long - and short - wave responsivities of the first channel to the Nth channel are all less than or equal to a preset difference threshold; If so, cure the collimating lens at the glued position; Pre - fix the lens array.

9. The method according to claim 8, wherein The pre-fixed lens array includes: Identifying the lens array and moving the lens array into the housing of the optical device to be coupled; Coupling the lens array to the optimal state in the XYZ directions and calculating the common flat area and the phase difference of the coupling curve; Judging whether the phase differences in the Y direction and the Z direction are both less than or equal to a fifth threshold; If so, judging whether the common flat area of the first channel to the Nth channel is greater than or equal to a sixth threshold, and judging whether the difference in short-wave and long-wave responsivities of the first channel to the Nth channel is less than or equal to a preset difference threshold; If so, recording the coupling position, angle and flat area value of the lens array; Withdrawing the lens array and applying glue at the coupling position of the lens array, and pre-fixing the lens array to the glue application position; Curing the lens array at the glue application position.

10. A receiving optical device, characterized in that, Obtained by coupling using the optical device coupling method described in any one of claims 1 to 9.

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