阅读说明：本技术 一种多通道紧凑型波分复用高速光器件 (Multichannel compact wavelength division multiplexing high-speed optical device ) 是由 罗建洪 邵嘉杭 王迪 郑祥 于 2019-10-30 设计创作，主要内容包括：一种多通道紧凑型波分复用高速光器件,包括沿光轴方向依次排列的激光器模组、第一光路转换模组、光纤耦合模组、以及光纤,其特征在于：还包括设置在第一光路转换模组下方的Z-Block模组,所述第一光路转换模组与光纤耦合模组之间还设有第二光路转换模组,用于将第一光路转换模组输出的N路平行光进行180゜弯折反射后输出到下方的Z-Block模组的入射端,所述Z-Block模组的出射端设有全反射结构,还包括设置在靠近Z-Block模组入射端一侧的第三光路转换模组。该多通道紧凑型波分复用高速光器件整体长度更短、结构更紧凑。(The utility model provides a multichannel compact wavelength division multiplexing high-speed optical device, includes along the laser module, first light path conversion module, fiber coupling module and the optic fibre that the optical axis direction arranged in proper order, its characterized in that: still including setting up the Z-Block module in first light path conversion module below, still be equipped with second light path conversion module between first light path conversion module and the fiber coupling module for carry out the N way parallel light of first light path conversion module output 180 degrees and buckle the incident end of the Z-Block module of output below after the reflection, the exit end of Z-Block module is equipped with the total reflection structure, still including setting up the third light path conversion module in being close to Z-Block module incident end one side. The multichannel compact wavelength division multiplexing high-speed optical device is shorter in overall length and more compact in structure.)

1. The utility model provides a multichannel compact wavelength division multiplexing high-speed optical device, includes along laser module (1), first light path conversion module (15), fiber coupling module (26) and optic fibre (24) that the optical axis direction arranged in proper order, the N way that laser module (1) sent is diverged light source (1A,1B,1C,1D) and is converted into N way parallel light, its characterized in that through first light path conversion module (15): also comprises a Z-Block module (6) arranged below the first optical path conversion module (15), a second optical path conversion module (16) is arranged between the first optical path conversion module (15) and the optical fiber coupling module (26), used for outputting the N-path parallel light output by the first optical path conversion module (15) to an incident end (18) of a Z-Block module (6) below after 180-degree bending reflection, the emergent end (19) of the Z-Block module (6) is provided with a total reflection structure, the optical path conversion module is used for returning one path of light output and synthesized by the Z-Block module (6) to the incident end (18) after 180-degree bending reflection, and also comprises a third optical path conversion module (17) arranged on one side close to the incident end (18) of the Z-Block module (6), the optical fiber coupling module (26) is used for coupling the path of light emitted and returned by the Z-Block module (6) into the optical fiber (24) after being bent and reflected again.

2. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: the first light path conversion module (15) comprises N groups of double lens groups corresponding to the N paths of divergent light sources (1A,1B,1C and 1D) respectively, each group of double lens groups comprises a first focusing lens (2) and a second coupling lens (4), and the first focusing lens (2) is closer to the laser module (1) than the second coupling lens (4).

3. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: the second optical path conversion module (16) comprises a first prism (5) which is arranged in the first optical axis direction and is positioned between the first optical path conversion module (15) and the optical fiber coupling module (26).

4. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: the third optical path conversion module (17) comprises a second prism (7) arranged on one side close to an incident end (18) of the Z-Block module (6) and a third prism (8) arranged in the direction of the first optical axis and positioned between the second optical path conversion module (16) and the optical fiber coupling module (26).

5. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: the total reflection structure of the exit end (19) of the Z-Block module (6) comprises a waveguide which is arranged on the exit end (19) and is ground into an angle of 40-45 degrees.

6. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 2, characterized in that: the laser module (1) and the first focusing lens (2) are both arranged on a constant temperature control module (12).

7. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 6, characterized in that: the optical lens module further comprises a supporting Block (3) used for fixing the second coupling lens (4) on the side face, and the Z-Block module (6) is installed below the supporting Block (3).

8. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: laser instrument module (1), first light path conversion module (15), second light path conversion module (16), third light path conversion module (17) and Z-Block module (6) all set up in same seal housing (13).

9. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 8, wherein: still including setting up in casing (13) and being close to circuit switching module (20) of laser instrument module (1) one side, circuit switching module (20) are including setting up base (21) in casing (13) and setting up on base (21) and tip extend to casing (13) outer high-speed line (22) and low-speed line (23), high-speed line (22) link to each other with outside circuit board (14) pad through the gold thread, low-speed line (23) link to each other with outside circuit board (14) pad through the PIN foot.

10. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 9, wherein: the high-speed lines (22) and part of the low-speed lines (23) are arranged on the front surface of the base (21), the rest of the low-speed lines (23) are arranged on the back surface of the base (21), and the distance between the PIN feet of the low-speed lines (23) on the front surface and the back surface is matched with the thickness of the circuit board (14) and used for clamping the circuit board (14) between the PIN feet on the front surface and the back surface.

11. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 1, characterized in that: the optical fiber coupling module (26) comprises an optical fiber coupling lens (10) and an optical isolator (9) arranged between the third optical path conversion module (17) and the optical fiber coupling lens (10), and the light coming out of the third optical path conversion module (17) enters the optical fiber (24) after passing through the optical isolator (9) and the optical fiber coupling lens (10) in sequence.

12. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 11, wherein: laser instrument module (1), first light path conversion module (15), second light path conversion module (16), third light path conversion module (17) and Z-Block module (6) all set up in same seal housing (13), light isolator (9) welding is outside casing (13), still be equipped with transition ring (25) between light isolator (9) and fiber coupling lens (10), install in a lens cone (27) fiber coupling lens (10), the one end that lens cone (27) are close to transition ring (25) is installed in transition ring (25), it is fixed with light isolator (9) after optical isolator (9) reciprocates the regulation position, lens cone (27) remove the regulation position after-fixing in transition ring (25) along transition ring (25).

13. A multi-channel compact wavelength division multiplexing high speed optical device according to claim 11, wherein: the optical fiber coupling module (26) further comprises an optical fiber ferrule (11) integrated with the optical fiber coupling lens (10).

Technical Field

The invention relates to the technical field of optical communication, in particular to a high-speed optical device with a multi-wavelength division multiplexing function.

Background

With the upgrading of communication systems and the rapid increase of communication bandwidth demands, existing communication systems face both capacity and energy consumption challenges. Parallel optical modules are increasingly being studied because they can provide greater bandwidth in a smaller space and with a lower power consumption.

An optical module with wavelength division multiplexing functionality typically includes an optical platform and a wavelength division multiplexed optical assembly. At present, a Z-Block module is generally adopted to be used as a wavelength division multiplexing optical component, but the Z-Block module is limited by the angle of light path reflection, so that enough distance must be ensured between channels, and the Z-Block module has longer extension in a horizontal structure, so that the application is limited to a certain extent; especially, under the condition that the channel speed is higher and higher, electronic components on the PCB board are more and more, so that a larger PCB board space is required, and the longer length dimension of the Z-block module inevitably limits the increase of the PCB board space, so that there is a need to design a wavelength division multiplexing high-speed optical device with a shorter size.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the multichannel compact wavelength division multiplexing high-speed optical device has shorter overall length and more compact structure.

The technical solution of the invention is as follows: the utility model provides a multichannel compact wavelength division multiplexing high-speed optical device, includes along laser instrument module, first light path conversion module, fiber coupling module and the optic fibre that the optical axis direction arranged in proper order, the N way divergent light source that the laser instrument module sent converts the parallel light of N way, its characterized in that through first light path conversion module: the optical fiber coupling module comprises a first optical path conversion module, a second optical path conversion module, a third optical path conversion module and a fiber coupling module, wherein the first optical path conversion module is arranged below the first optical path conversion module, the second optical path conversion module is arranged between the first optical path conversion module and the fiber coupling module, the incident end of the Z-Block module is used for outputting N-path parallel light output by the first optical path conversion module after being subjected to 180-degree bending reflection, the emergent end of the Z-Block module is provided with a total reflection structure and is used for returning one path of light output and synthesized by the Z-Block module after being subjected to 180-degree bending reflection to the incident end, and the third optical path conversion module is arranged on one side close to the incident end of the Z-Block module and is used for coupling the path of light returned by the Z-Block module after being subjected to bending reflection again to the fiber coupling module.

After adopting the structure, the invention has the following advantages:

the multichannel compact wavelength division multiplexing high-speed optical device adopts the light path design of upper and lower layers and back-and-forth overlapping, so that the Z-Block module can be arranged below the first light path conversion module, the length of the optical device can be greatly reduced, the whole size is shorter, and the structure is more compact; in addition, parallel light is coupled into the Z-Block module, so that the allowable error of the whole optical path coupling system can be increased, and the optical path structure is insensitive to the position movement of each component and has stronger stability.

Preferably, the first optical path conversion module includes N groups of double lens groups respectively corresponding to the N divergent light sources, each group of double lens groups includes a first focusing lens and a second coupling lens, and the first focusing lens is closer to the laser module than the second coupling lens. Lens coupling can achieve higher coupling efficiency than direct coupling, and by adopting double-lens coupling, tolerance can be dispersed, so that elements on an optical path can have larger displacement space.

Preferably, the second optical path conversion module includes a first prism disposed in the first optical axis direction and located between the first optical path conversion module and the fiber coupling module. The device has simple structure and low cost.

Preferably, the third optical path conversion module comprises a second prism arranged at one side close to the incident end of the Z-Block module, and a third prism arranged in the first optical axis direction and located between the second optical path conversion module and the optical fiber coupling module. The device has simple structure and low cost.

Preferably, the total reflection structure of the exit end of the Z-Block module comprises a grinding part which is arranged on the exit end and is ground to 40 DEG degree

-a 45 ° angle waveguide. The total reflection structure is simple and easy to process.

Preferably, the laser module and the first focusing lens are both arranged on a constant temperature control module. This setting can make the temperature control of laser instrument module and first focusing lens under homothermal operating condition, and the temperature is more stable, and work is more reliable.

Preferably, the optical module further comprises a supporting Block for laterally fixing the second coupling lens, and the Z-Block module is arranged below the supporting Block. Because the second coupling lens compares laser instrument module and first focusing lens, and the requirement to the temperature is lower relatively, consequently do not install it on constant temperature control module group, but utilize the space that this part was saved, with its and Z-Block module stack from top to bottom together, reuse supporting shoe to carry out slight regulation to the height of second coupling lens, not only can make Z-Block module mounted position comparatively reasonable, overall structure is comparatively compact, can guarantee moreover that the light path of optical devices such as laser instrument module, first focusing lens, second coupling lens can align.

Preferably, the laser module, the first optical path conversion module, the second optical path conversion module, the third optical path conversion module and the Z-Block module are all arranged in the same sealed shell. This arrangement can guarantee the most stringent reliability requirements.

Preferably, still including setting up in the casing and be close to the circuit switching module of laser instrument module one side, circuit switching module is including setting up the base in the casing and set up on the base and the tip extends to the high-speed line and the low-speed line outside the casing, the high-speed line passes through the gold thread and links to each other with outside circuit board pad, the low-speed line passes through the PIN foot and links to each other with outside circuit board pad. The high-speed line adopts the mode that the gold thread is connected to be connected with the circuit board, can guarantee the high-speed characteristic of whole module to the at utmost, and the cost can be practiced thrift to the low-speed line adoption PIN foot to can guarantee with the fixed fastness of circuit board.

Preferably, the high-speed lines and part of the low-speed lines are arranged on the front surface of the base, the rest of the low-speed lines are arranged on the back surface of the base, and the distance between the PIN feet of the low-speed lines on the front surface and the back surface is matched with the thickness of the circuit board and is used for clamping the circuit board between the PIN feet on the front surface and the back surface. The circuit board is clamped between the positive and negative PIN PINs, so that the circuit board can be fixed more firmly and reliably.

Preferably, the optical fiber coupling module comprises an optical fiber coupling lens and an optical isolator arranged between the third optical path conversion module and the optical fiber coupling lens, and the light coming out of the third optical path conversion module enters the optical fiber after passing through the optical isolator and the optical fiber coupling lens in sequence. The optical isolator is arranged to prevent light reflection and realize unidirectional transmission of light; the optical isolator is positioned behind the third optical path conversion module and is placed in a parallel optical path, so that better isolation can be obtained; compared with the scheme of placing the optical isolator at the end of the laser module, the number of the optical isolators can be reduced, and the product cost is reduced.

Preferably, the optical isolator is welded outside the shell, a transition ring is further arranged between the optical isolator and the optical fiber coupling lens, the optical fiber coupling lens is installed in a lens barrel, one end, close to the transition ring, of the lens barrel is installed in the transition ring, the transition ring is fixed with the optical isolator after moving up and down the adjusting position of the optical isolator, and the lens barrel is fixed in the transition ring after moving left and right the adjusting position of the transition ring. The transition ring is arranged, so that the position of the optical fiber coupling lens can be adjusted, the optical path can be reliably aligned, and the coupling efficiency is higher.

Preferably, the fiber coupling module further includes a fiber stub integrated with the fiber coupling lens. This arrangement ensures a better and more reliable coupling of the optical path into the optical fibre.

Description of the drawings:

FIG. 1 is a schematic optical path diagram of a multi-channel compact wavelength division multiplexing high-speed optical device according to the present invention;

FIG. 2 is another schematic optical path diagram of the multi-channel compact wavelength division multiplexing high-speed optical device of the present invention;

FIG. 3 is a schematic diagram of the front side structure of the multi-channel compact wavelength division multiplexing high-speed optical device of the present invention;

FIG. 4 is a schematic diagram of the reverse structure of the multi-channel compact wavelength division multiplexing high-speed optical device of the present invention;

FIG. 5 is a top view of the interior of the multi-channel compact wavelength division multiplexing high speed optical device of the present invention;

FIG. 6 is a cross-sectional view of the interior of the multi-channel compact wavelength division multiplexing high speed optical device of the present invention;

in the figure: 1-a laser module, 2-a first focusing lens, 3-a support Block, 4-a second coupling lens, 5-a first prism, 6-Z-Block module, 7-a second prism, 8-a third prism, 9-an optical isolator, 10-a fiber coupling lens, 11-a fiber ferrule, 12-a constant temperature control module, 13-a housing, 14-a circuit board, 15-a first optical path conversion module, 16-a second optical path conversion module, 17-a third optical path conversion module, an incident end of 18-Z-Block module, an emergent end of 19-Z-Block module, 20-a circuit switching module, 21-a base, 22-a high speed line, 23-a low speed line, 24-a fiber, 25-a transition ring, 26-a fiber coupling module, 27-lens barrel.

Detailed Description

The invention is further described with reference to the following embodiments in conjunction with the accompanying drawings.