CN219610994U - Light source device and module - Google Patents
Light source device and module Download PDFInfo
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- CN219610994U CN219610994U CN202223613545.9U CN202223613545U CN219610994U CN 219610994 U CN219610994 U CN 219610994U CN 202223613545 U CN202223613545 U CN 202223613545U CN 219610994 U CN219610994 U CN 219610994U
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Abstract
The utility model relates to the technical field of optical gain, and discloses a light source device and a module, wherein the light source device comprises a laser for generating laser, a focusing lens structure and a power sensor, wherein the focusing lens structure is in optical connection with the light source module, the light source device comprises a polarization structure, the polarization structure is arranged between the laser and the focusing lens structure, so that the laser generated by the laser is converted into polarized light, and the polarized light is focused on the power sensor by the focusing lens structure; the operational amplifier unit is arranged to transmit a current signal to the diffusion unit through the diffusion unit, so that expansion of current and voltage is realized; by adding the polarization structure in the silicon light source module, after light emitted by the laser passes through the polarization structure, most of light energy in the unpolarized direction can be filtered by utilizing the polarization function of the polarization structure, so that the extinction ratio PER is improved.
Description
Technical Field
The utility model relates to the technical field of optical gain, in particular to a light source device and a module.
Background
In the field of optical communication, a silicon optical light source module is a light source for high-speed data transmission; the optical fiber has the advantages of high performance, low cost and expandability, so that the optical fiber has wide prospect in the optical connection fields of data centers, high-performance data exchange, long-distance interconnection and the like.
However, the performance of silicon light source modules is limited by factors such as material processing, and the requirements for the Polarization Extinction Ratio (PER) of the light source are high. The polarization extinction ratio refers to the proportional relationship between two orthogonal polarization components in dB; typically, the requirements of a silicon light source module for the light source polarization extinction ratio are PER >25dB; however, the polarization extinction ratio of the existing high-power light source module is generally smaller, and the requirement of the silicon light source module cannot be met.
Therefore, the scheme provides a structure capable of effectively improving the polarization extinction ratio of the silicon light source module.
Disclosure of Invention
The utility model aims to provide a light source device and a module, and aims to solve the problem that the prior art lacks the requirement of realizing the high extinction ratio of a silicon light source module.
The utility model is realized in such a way that the light source device comprises a laser for generating laser, a focusing lens structure and a power sensor, wherein the focusing lens structure is in optical connection with the light source module, the power sensor comprises a polarization structure, and the polarization structure is arranged between the laser and the focusing lens structure, so that the laser generated by the laser is converted into polarized light and is focused on the power sensor by the focusing lens structure.
Preferably, the polarizing structure has a light incident surface and a light emergent surface, and the polarizing structure is disposed on a light path of laser generated by the laser, and the light incident surface and the light emergent surface are located at the center of the light path.
Preferably, the light incident surface and the light emergent surface of the polarizing structure are parallel and perpendicular to the light path.
Preferably, the light incident surface has a plurality of vibration-transmitting surfaces arranged side by side, and a normal line of the vibration-transmitting surfaces intersects with the optical path to form an inclination angle of 0 to 45 degrees.
Preferably, the vibration-transmitting surface obliquely intersects the optical path, and gradually becomes parallel to the optical path as the distance between the vibration-transmitting surface and the center of the optical path increases.
Preferably, the light incident surface and the light emergent surface are curved inward along the advancing direction of the light path, and the bending angle is gradually increased from inside to outside.
Preferably, the vibration transmission direction of the polarizing structure is a horizontal direction, so as to filter the light field in the vertical direction of the laser.
Wherein, it is preferable that the polarizing structure is a linear polarizer.
Preferably, the laser device further comprises an incidence lens structure, wherein the polarization structure is positioned between the laser device and the incidence lens structure, and the incidence lens structure is used for focusing laser generated by the laser device and transmitting the laser to the polarization structure.
In a second aspect, the present utility model provides a light source module, connected to a light source device as described above, further comprising a control device, connected to the laser and the power sensor, for measuring the laser intensity and controlling the light source device to generate laser light.
Compared with the prior art, the light source device and the module provided by the utility model have the advantages that the polarization structure is added into the silicon light source module, and when the light emitted by the laser passes through the polarization structure, most of light energy in the unpolarized direction can be filtered by utilizing the polarization function of the polarization structure, so that the extinction ratio PER is improved.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, corresponding to which are explained:
fig. 1 is a schematic light path diagram of a light source device according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a vibration-transmitting surface provided by an embodiment of the present utility model;
FIG. 3 is a schematic side view of a light source device according to an embodiment of the present utility model;
fig. 4 is a schematic side view of a light source device according to an embodiment of the present utility model;
for ease of reference, the names and corresponding icons of the devices or structures presented in the drawings are as follows:
1. a light source device;
10. a laser; 11. a focusing lens structure; 12. a power sensor;
20. a polarizing structure; 21. a light incident surface; 211. a vibration-transmitting surface; 22. a light-emitting surface;
30. an incident lens structure;
4. a control device;
5. an optical path;
6. and a device under test.
Detailed Description
Embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, a preferred embodiment of a light source device is provided in the present utility model.
The light source device 1 comprises a laser 10 for generating laser light, a focusing lens structure 11 and a power sensor 12 which are optically connected with a light source module, and a polarization structure 20, wherein the polarization structure 20 is arranged between the laser 10 and the focusing lens structure 11, so that the laser light generated by the laser 10 is converted into polarized light, and the polarized light is focused on the power sensor 12 by the focusing lens structure 11; by adding the polarization structure 20 into the silicon light source module, after the light emitted by the laser 10 passes through the polarization structure 20, most of the light energy in the unpolarized direction can be filtered by utilizing the polarization function of the polarization structure 20, so that the extinction ratio PER is improved.
It should be noted that the focusing lens structure 11 may be composed of one or more lenses for transmitting light from one direction to another; in this embodiment, the focusing lens structure 11 may be a single lens or an array of a plurality of lenses, and the focusing lens structure 11 is used to focus the polarized light converted by the polarizing device onto the power sensor 12, so as to increase the energy received on the power sensor 12. In addition, the laser 10 in the present embodiment is used for generating laser light, specifically, high-energy monochromatic light; the polarizing structure 20 may be these polarizing means or polarizing elements: a Polarizing Beam Splitter (PBS), a polarizing modulator (POM), a Polarization Converter (PC), a polarizing interferometer (PBSI), a Polarizing Optical Element (POE), a polarizing optical waveguide (PWG), which is mainly a polarizing optical element in this embodiment, as a reference, the polarizing structure 20 in this embodiment is a linear polarizer, where the linear polarizer is an optical element that can be used to control the polarization state of light, and in a common case, is made of a film coated with a specific refractive index, so that the propagation direction of electromagnetic waves of light in space can propagate along a specific direction; in particular, linear polarizers can also be used to filter out light energy of a particular polarization state. For example, in this embodiment, which is used to filter out the light energy of the TM polarization state of light (i.e., the light field distribution in the vertical direction), a linear polarizer may be used.
The polarizing structure 20 used in the present embodiment may be composed of one piece of linear polarizer, but may also be composed of a plurality of pieces of linear polarizer, and when composed of one piece of linear polarizer, the polarization direction of light may be changed once; if the light source is composed of a plurality of linear polaroids, the polarization direction of the light can be changed multiple times, and then certain polarization directions are thoroughly filtered out.
In the embodiment, the polarizing structure 20 has a light incident surface 21 and a light emergent surface 22, the polarizing structure 20 is disposed on the light path 5 of the laser beam generated by the laser 10, the light incident surface 21 and the light emergent surface 22 are located at the center of the light path 5, and the light incident surface 21 and the light emergent surface 22 of the polarizing structure 20 are disposed at the center of the light path 5, so that the polarization direction of the light beam is easier to be controlled. The effect of the polarizing structure 20 is more pronounced because light passes through the middle of the light path. In addition, the light incident surface 21 and the light emergent surface 22 are positioned in the center of the light path 5, so that the polarization structure 20 is more stable, and the influence of the position and the posture of the polarization structure 20 on the light is smaller, thereby being beneficial to improving the stability and the reliability of the utility model.
Further, the light incident surface 21 and the light emergent surface 22 of the polarizing structure 20 are parallel and perpendicular to the light path 5, and the light incident surface 21 and the light emergent surface 22 of the polarizing structure 20 are parallel and perpendicular to the light path 5, so as to help control the polarization direction of the light, because the polarization direction of the light can be expressed by the included angle between the propagation direction of the light and the polarization plane. When the light incident surface 21 and the light emergent surface 22 of the polarizing structure 20 are parallel, the polarizing structure 20 does not change the propagation direction of the light. This means that if the propagation direction of the light ray is unchanged when passing through the polarizing structure 20, the light field of the polarized light can be controlled more precisely according to the polarization direction of the polarizing structure 20, for example, in the present embodiment, the final extinction ratio of the light source device 1 is required to be raised, considering that the light emitted by the light module laser 10 may exist TM (vertical light field distribution) and TE (parallel light field distribution), and the polarization extinction ratio PER refers to the energy ratio of the light in the two light field directions. By using a fixed polarization direction, most of the light energy of TM (light field distribution in the vertical direction) is filtered out, so that the extinction ratio PER of the light source module of the finally-entering silicon light is improved, and if the light incident surface 21 and the light emergent surface 22 of the polarization structure 20 are not parallel and perpendicular to the light path 5, the maximum use effect cannot be achieved.
Fig. 2 and 3 are examples of the light incident surface 21 and the light emergent surface 22 in the present embodiment:
the light incident surface 21 has a plurality of vibration transmitting surfaces 211 arranged side by side, and the normal line of the vibration transmitting surface 211 crosses the light path 5 to form an inclination angle of 0 to 45 degrees, which allows the polarization structure 20 to control the polarization direction of light in the polarization plane, for example, assuming that the light incident surface 21 and the light emitting surface 22 of the polarization structure 20 are both perpendicular to the light path 5 and the normal line of the vibration transmitting surface 211 crosses the light path 5 to form an inclination angle of 0 degrees, this means that no polarization effect is generated on the laser, and if the normal line of the vibration transmitting surface 211 forms an inclination angle of 45 degrees with the light path 5, this means that the theoretically strongest polarization effect is generated on the laser, specifically, the light field in a certain light field direction is distributed to be reflected or filtered, and the light field in another direction can normally pass, in this embodiment, the light field in the vertical direction is reflected or filtered.
In addition, the vibration-transmitting surface 211 is inclined to intersect with the optical path 5, and the inclination angle decreases as the distance between the vibration-transmitting surface 211 and the center of the optical path 5 increases, specifically, the vibration-transmitting surface 211 and the optical path 5 are inclined to intersect, and gradually parallel to the optical path 5 as the distance between the vibration-transmitting surface 211 and the center of the optical path 5 increases, and by setting a variable inclination angle, the polarization efficiency can be further improved by utilizing the angle change of the inclination angle; and at the same time, a certain focusing function is performed on the polarizing structure 20.
Similarly, the light incident surface 21 and the light emergent surface 22 are curved inwards along the advancing direction of the light path 5, and the bending angle is gradually increased from inside to outside, so that the light incident surface 21 and the light emergent surface 22 also play a certain focusing function in consideration of the fact that the path on which the laser propagates is the vibration of the sine wave, and the refractive index and uniformity of the light path 5 are improved.
The vibration transmission direction of the polarizing structure 20 is a horizontal direction to filter the light field in the vertical direction of the laser, where the vibration transmission direction refers to the polarization conversion direction of the light by the polarizing structure 20, and may also be referred to as a polarization direction. The polarizing structure 20 may be used to filter the polarization direction of light, i.e. to filter out some polarization directions of light while preserving other polarization directions, whereas in this embodiment the polarization structure 20 has a horizontal polarization direction, meaning that it filters out the light field in the vertical direction of the laser.
In this embodiment, a light source device further includes a device under test as shown in fig. 1 to 3 for testing the light intensity. Also, a light source device 1 further includes an incident lens structure 30, the polarization structure 20 being located between the laser 10 and the incident lens structure 30, the incident lens structure 30 being configured to focus laser light generated by the laser 10 and transmit it to the polarization structure 20; the entrance lens structure 30 may take many different forms, such as a spherical lens, a cylindrical lens, or other optical element, and may be used to change the shape of the beam of laser light generated by the laser 10 so that it can be focused onto the polarizing structure 20, which may allow the polarizing structure 20 to more easily filter out light rays of a given polarization direction, taking into account the effect of the angle of the polarizing structure 20 on polarization.
Not shown in the drawings is a light source module according to the present utility model, which is connected to a light source device 1 as above, and further comprises a control device connected to the laser 10 and the power sensor 12 to measure the intensity of the laser light and control the light source device 1 to generate the laser light; by using the control means, the intensity of the laser light generated by the light source device 1 can be controlled more accurately. For example, if the power sensor 12 detects that the laser intensity is too weak, the control device may increase the laser intensity by adjusting the operating parameters of the laser 10. Conversely, if the power sensor 12 detects that the laser intensity is too strong, the control device can reduce the laser intensity by adjusting the working parameters of the laser 10, which is convenient.
Moreover, the terms first, second, etc. in the foregoing description are not intended to be limiting, but are merely used as identifying terms, for example, for locating a particular object in a particular position or for spatially relative positioning, as defined by the orientation of the object in the text.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The light source device comprises a laser for generating laser, a focusing lens structure and a power sensor, wherein the focusing lens structure is in optical connection with a light source module, and the light source device is characterized by comprising a polarization structure, wherein the polarization structure is arranged between the laser and the focusing lens structure, so that the laser generated by the laser is converted into polarized light, and the polarized light is focused on the power sensor by the focusing lens structure.
2. The light source device according to claim 1, wherein the polarization structure has a light incident surface and a light emergent surface, the polarization structure is disposed on a light path of the laser light generated by the laser, and the light incident surface and the light emergent surface are disposed at a center of the light path.
3. The light source device according to claim 2, wherein the light incident surface and the light emergent surface of the polarizing structure are parallel and perpendicular to the light path.
4. A light source device according to claim 2, wherein the light incident surface has a plurality of vibration-transmitting surfaces arranged side by side, and a normal line of the vibration-transmitting surfaces intersects the optical path to form an inclination angle of 0 to 45 degrees.
5. A light source device as recited in claim 4, wherein said vibration-transmitting surface obliquely intersects the light path and gradually becomes parallel to said light path as the distance between said vibration-transmitting surface and the center of the light path increases.
6. A light source device according to any one of claims 2 to 4, wherein the light incident surface and the light exit surface are curved inward along a forward direction of the optical path, and the curved angle is gradually increased from inside to outside.
7. A light source device as recited in any one of claims 1-5, wherein a direction of transmission of said polarization structure is a horizontal direction to filter a vertically directed light field of said laser light.
8. A light source device as recited in any one of claims 1-5, wherein said polarizing structure is a linear polarizer.
9. A light source device as recited in any one of claims 1-5, further comprising an incident lens structure, said polarizing structure being located between said laser and said incident lens structure, said incident lens structure being configured to focus and transmit laser light generated by said laser to said polarizing structure.
10. A light source module connected to a light source device according to any one of claims 1-9, further comprising control means connected to the laser and the power sensor for measuring the laser intensity and controlling the light source device to generate laser light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613545.9U CN219610994U (en) | 2022-12-30 | 2022-12-30 | Light source device and module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613545.9U CN219610994U (en) | 2022-12-30 | 2022-12-30 | Light source device and module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219610994U true CN219610994U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223613545.9U Active CN219610994U (en) | 2022-12-30 | 2022-12-30 | Light source device and module |
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| Country | Link |
|---|---|
| CN (1) | CN219610994U (en) |
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- 2022-12-30 CN CN202223613545.9U patent/CN219610994U/en active Active
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