400G DR4 optical engine

Abstract

The 400G DR4 optical engine comprises a multi-channel optical fiber array and four optical transmitting ends, an optical isolator coupled with the multi-channel optical fiber array is arranged on the light incident side of the multi-channel optical fiber array, an oblique angle lens is coupled between each optical transmitting end and the optical isolator, and the light emergent surface of each oblique angle lens is an inclined surface; four paths of horizontal light emitted by the four light emitting ends are respectively coupled into the four oblique angle lenses, and the oblique angle lenses convert the horizontal light into oblique light which is refracted into the same optical isolator; and the optical isolator couples the four paths of inclined light which are distributed in a beam opening shape, wherein the beam opening ends of the inclined light are positioned on the light incident side of the optical isolator, into four adjacent optical channels on the multi-channel optical fiber array. The multi-channel optical fiber array has the beneficial effects that the multi-channel optical fiber array with smaller optical channel spacing can be adopted, the size of the multi-channel optical fiber array is reduced and the cost is reduced under the condition that the number of the optical channels is kept the same, the number of the optical isolators is changed from four to one, and the patching frequency of the optical isolators is reduced by three times.

Description

Technical Field

[0001] The present invention relates to the technical field of optical engines, and in particular to a 400G DR4 optical engine. Background Art

[0002] The traditional 400G DR4 optical engine structure is as follows Figure 1 As shown, it includes: a multi-channel optical fiber array, four light emitting ends, four lenses and four optical isolators, the four light emitting ends are equally spaced and arranged side by side on the light incident side of the multi-channel optical fiber array, the side-by-side distribution direction of the four light emitting ends is the same as the side-by-side distribution direction of each optical channel in the multi-channel optical fiber array, the light beam emitted by each light emitting end is sequentially coupled into one of the optical channels of the multi-channel optical fiber array through a lens and an optical isolator, the four lenses are equally spaced and arranged side by side, the side-by-side distribution direction of the four lenses is the same as the side-by-side distribution direction of each optical channel in the multi-channel optical fiber array, the four optical isolators are equally spaced and arranged side by side, the side-by-side distribution direction of the four optical isolators is the same as the side-by-side distribution direction of the multi-channel optical fiber array, The side-by-side distribution direction of each optical channel in the optical fiber array is the same; since the minimum size of the lens is usually 0.6mm, considering coupling clamping, etc., the spacing between the four channels is usually at least 1mm, that is, the spacing between two adjacent optical emitting ends of the four optical emitting ends is 1mm, the spacing between two adjacent lenses of the four lenses is 1mm, the spacing between two adjacent optical isolators of the four optical isolators is 1mm, and the spacing between two adjacent optical channels in the multi-channel optical fiber array is 1mm. The size of the optical isolator used is approximately 0.6mm. Under this scheme, since the number of optical isolators is four, the number of couplings is 4, and the cost of the four optical isolators is also relatively high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a 400G DR4 optical engine to overcome the deficiencies in the above-mentioned prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a 400G DR4 optical engine, comprising: a multi-channel optical fiber array and four light emitting ends which are equally spaced at 1mm intervals and arranged side by side on the light incident side of the multi-channel optical fiber array, an optical isolator coupled to the multi-channel optical fiber array is arranged on the light incident side, an oblique lens is coupled between each light emitting end and the optical isolator, and the light emitting surface of each oblique lens is an oblique surface; four paths of horizontal light emitted by the four light emitting ends are respectively coupled into four oblique lenses, and the oblique lenses convert the horizontal light into inclined light and refract it into the same optical isolator, and then the optical isolator couples the four paths of inclined light which are distributed in a beam-shaped manner and the beam ends are located on the light incident side of the optical isolator into four adjacent optical channels on the multi-channel optical fiber array.

[0005] The beneficial effects of the present invention are as follows: the lens coupled between the light emitting end and the optical isolator is adjusted to an angled lens of a specific structure, so that the light output from the optical isolator coupled into the optical isolator through the lens is converted from horizontal light to inclined light, and the four-way inclined light is distributed in a beam-shaped shape with the beam end located at the light incident side of the optical isolator, so that a multi-channel optical fiber array with a smaller optical channel spacing can be used, and the size of the multi-channel optical fiber array is reduced while keeping the number of optical channels the same, effectively reducing the cost. In addition, the number of optical isolators is also reduced from four to one, and the number of patches of the optical isolator is reduced by 3 times. The size of a single large-size optical isolator is relatively smaller than that of four traditional optical isolators, that is, the size is reduced, and the cost is further reduced.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, four bevel lenses are arranged side by side at equal intervals of 1 mm, the bevel lens located in the first channel is mirrored with the bevel lens located in the fourth channel, and the bevel lens located in the second channel is mirrored with the bevel lens located in the third channel.

[0008] Furthermore, the incident angle a of the oblique lens light in the first channel and the fourth channel incident on the light exiting surface is 19°±3°, and the refraction angle b is 40°±3°.

[0009] Furthermore, the incident angle c of the oblique lens light in the second channel and the third channel incident on the light exiting surface is 12°±3°, and the refraction angle d is 24.2°±3°.

[0010] Furthermore, the refractive index of the oblique angle lens is greater than or equal to 1.97.

[0011] A further beneficial effect of the above method is that light can be tilted at a predetermined angle and coupled into the optical isolator.

[0012] Furthermore, the length dimension of the optical isolator is 1.2 mm±0.2 mm.

[0013] A further beneficial effect of the above is that a large optical isolator is used to replace four traditional optical isolators, and the length of the optical isolator is 1.2 mm. The cost of the optical isolator is approximately equivalent to the two optical isolators of the original solution, and the cost is reduced by 50%.

[0014] Furthermore, the spacing between adjacent optical channels in the multi-channel optical fiber array is 0.127 mm.

[0015] The above method has the further beneficial effect that the spacing between adjacent optical channels in the multi-channel optical fiber array is reduced from 1 mm to 0.127 mm, thereby reducing the size of the multi-channel optical fiber array while maintaining the same number of optical channels, thereby effectively reducing costs.

[0016] Furthermore, the bevel lens is formed by integrating a lens and a bevel prism.

[0017] A further beneficial effect of the above method is that the direction of light can be changed according to a predetermined requirement without increasing the number of lenses.

[0018] Furthermore, the optical isolator is bonded to the light incident side of the multi-channel optical fiber array. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a 400G DR4 optical engine in the prior art; Figure 2 This is a structural diagram of the 400G DR4 optical engine in the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Multi-channel optical fiber array, 2. Light emitting end, 3. Optical isolator, 4. Angled lens, 410, light emitting surface. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] Example 1 like Figure 2 As shown, a 400G DR4 optical engine includes: a multi-channel optical fiber array 1 and four optical emitting ends 2, the four optical emitting ends 2 are arranged side by side at an equal interval of 1mm on the light incident side of the multi-channel optical fiber array 1, and the side-by-side distribution direction of the four optical emitting ends 2 is the same as the side-by-side distribution direction of each optical channel in the multi-channel optical fiber array 1, that is, this part of the structure remains consistent with the prior art; an optical isolator 3 coupled to the multi-channel optical fiber array 1 (the multi-channel optical fiber array 1) is arranged on the light incident side, and an angled lens 4 is coupled between each optical emitting end 2 and the optical isolator 3. Since there are four light emitting ends 2, the number of angled lenses 4 is also four, and the light output of each angled lens 4 is The surface 410 is an inclined surface. The horizontal light emitted by each light emitting end 2 is first coupled into an angled lens 4, and then the angled lens 4 converts the horizontal light into inclined light and refracts it out at the light emitting surface. Since there are four light emitting ends 2 and four angled lenses 4, there are four paths of inclined light. The four paths of horizontal light emitted by the four light emitting ends 2 are respectively coupled into the four angled lenses 4, and the angled lenses 4 convert the horizontal light into inclined light and refract it into the same optical isolator 3, and then the optical isolator 3 couples the four paths of inclined light into four adjacent optical channels on the multi-channel optical fiber array 1. The four paths of inclined light are distributed in a beam-shaped shape and the beam end is located at the light incident side of the optical isolator 3. The lens coupled between the light emitting end 2 and the optical isolator 3 is adjusted to an angled lens 4 of a specific structure, so that the light output from the optical isolator 3 coupled through the lens is converted from horizontal light to inclined light, and the four-way inclined light is distributed in a beam-shaped shape with the beam end located at the light incident side of the optical isolator 3, so that a multi-channel optical fiber array 1 with a smaller optical channel spacing can be used. While keeping the number of optical channels the same, the size of the multi-channel optical fiber array 1 is reduced, effectively reducing the cost. In addition, the number of optical isolators 3 is also reduced from four to one, and the number of patches of the optical isolator 3 is reduced by 3 times. Compared with the size of the traditional four optical isolators, the size of a single large-size optical isolator is reduced in overall material, that is, the size is reduced, and the cost is further reduced.

[0023] Example 2 like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows: The four bevel lenses 4 are distributed side by side at equal intervals of 1 mm, and the side-by-side distribution direction of the four bevel lenses 4 is the same as the side-by-side distribution direction of the four light emitting ends 2, that is, the layout of this part is still consistent with the prior art. The bevel lens 4 located in the first channel is mirror-distributed with the bevel lens 4 located in the fourth channel, that is, the bevel lens 4 in the first channel has the same structure as the bevel lens 4 in the fourth channel, but the arrangement direction of the light emitting surface 410 is different. The bevel lens 4 located in the second channel is mirror-distributed with the bevel lens 4 located in the third channel, that is, the bevel lens 4 in the second channel has the same structure as the bevel lens 4 in the third channel, but the arrangement direction of the light emitting surface 410 is different. The bevel lenses 4 in the first channel and the second channel are mirror-distributed with the bevel lenses 4 in the third channel and the fourth channel.

[0024] Furthermore: the incident angle a of the light of the bevel lens 4 located in the first channel incident on the light exit surface is 19°±3°, and the refraction angle b is 40°±3°; the incident angle a of the light of the bevel lens 4 located in the fourth channel incident on the light exit surface is 19°±3°, and the refraction angle b is 40°±3°; As a preferred solution: the incident angle a of the light from the bevel lens 4 located in the first channel incident on the light exit surface is 19°, and the refraction angle b is 40°. The incident angle a of the light from the bevel lens 4 located in the fourth channel incident on the light exit surface is 19°, and the refraction angle b is 40°.

[0025] The incident angle c of the light of the bevel lens 4 located in the second channel incident on the light exit surface is 12°±3°, and the refraction angle d is 24.2°±3°. The incident angle c of the light of the bevel lens 4 located in the third channel incident on the light exit surface is 12°±3°, and the refraction angle d is 24.2°±3°. As a preferred solution: the incident angle c of the light from the bevel lens 4 located in the second channel incident on the light exit surface is 12°, and the refraction angle d is 24.2°. The incident angle c of the light from the bevel lens 4 located in the third channel incident on the light exit surface is 12°, and the refraction angle d is 24.2°.

[0026] The bevel lens 4 is made of a high refractive index material. According to the incident angle and the refractive angle determined above, it can be deduced that the refractive index of the material used in the bevel lens 4 is greater than or equal to 1.97.

[0027] Example 3 like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 2, and the details are as follows: The length of the optical isolator 3 is 1.2 mm ± 0.2 mm. A large optical isolator 3 is used to replace four traditional optical isolators. The length of the optical isolator 3 is 1.2 mm ± 0.2 mm. The cost of the optical isolator 3 is approximately equivalent to that of the two optical isolators in the original solution, and the cost is reduced by about 50%. like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 3, and the details are as follows: The spacing between adjacent optical channels in the multi-channel optical fiber array 1 is 0.127 mm, that is, the spacing between adjacent optical channels in the multi-channel optical fiber array 1 is reduced from 1 mm to 0.127 mm. While keeping the number of optical channels the same, the size of the multi-channel optical fiber array 1 is reduced, effectively reducing the cost.

[0028] Example 5 like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 4, and the details are as follows: The bevel lens is an integration of a lens and a bevel prism. It does not increase the number of lenses but can change the direction of light according to predetermined requirements.

[0029] Example 6 like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 5, and the details are as follows: The optical isolator 3 is bonded to the light incident side of the multi-channel optical fiber array 1 .

[0030] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A 400G DR4 optical engine, comprising: A multi-channel optical fiber array (1) and four light emitting ends (2) which are arranged side by side at equal intervals of 1 mm on the light incident side of the multi-channel optical fiber array (1), characterized in that an optical isolator (3) coupled to the multi-channel optical fiber array (1) is arranged on the light incident side of the multi-channel optical fiber array (1), an oblique lens (4) is coupled between each light emitting end (2) and the optical isolator (3), and the light emitting surface (410) of each oblique lens (4) is an oblique surface; four paths of horizontal light emitted by the four light emitting ends (2) are respectively coupled into the four oblique lenses (4), and the oblique lenses (4) convert the horizontal light into oblique light and refract it into the same optical isolator (3), and then the optical isolator (3) couples the four paths of oblique light which are distributed in a beam-shaped manner and whose beam ends are located on the light incident side of the optical isolator (3) into four adjacent optical channels on the multi-channel optical fiber array (1).

2. The 400G DR4 optical engine according to claim 1, characterized in that: The four oblique angle lenses (4) are arranged side by side at equal intervals of 1 mm, the oblique angle lens (4) located in the first channel and the oblique angle lens (4) located in the fourth channel are arranged in a mirror image, and the oblique angle lens (4) located in the second channel and the oblique angle lens (4) located in the third channel are arranged in a mirror image.

3. The 400G DR4 optical engine according to claim 2, characterized in that: The incident angle a of the light from the oblique angle lens (4) located in the first channel and the fourth channel incident on the light exiting surface is 19°±3°, and the refraction angle b is 40°±3°.

4. The 400G DR4 optical engine according to claim 3, characterized in that: The incident angle c of the light from the oblique-angle lens (4) located in the second channel and the third channel incident on the light-emitting surface is 12°±3°, and the refraction angle d is 24.2°±3°.

5. The 400G DR4 optical engine according to claim 4, characterized in that: The refractive index of the oblique angle lens (4) is greater than or equal to 1.

97.

6. The 400G DR4 optical engine according to claim 4, characterized in that: The length dimension of the optical isolator (3) is 1.2 mm±0.2 mm.

7. The 400G DR4 optical engine according to claim 6, characterized in that: The spacing between adjacent optical channels in the multi-channel optical fiber array (1) is 0.127 mm.

8. A 400G DR4 optical engine according to any one of claims 1 to 7, characterized in that: The oblique angle lens is formed by integrating a lens and an oblique angle prism.

9. The 400G DR4 optical engine according to claim 1, characterized in that: The optical isolator (3) is bonded to the light incident side of the multi-channel optical fiber array (1).

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