CN220064444U - Light emitting assembly and light module - Google Patents

Abstract

The utility model discloses a light emitting assembly and a light module. The optical emission component comprises an optical emitter for emitting optical signals, and a first lens, a second lens and an optical fiber port which are sequentially arranged along a transmission path of the optical signals; the optical signal is parallel light between the first lens and the second lens; the light emitting assembly further includes a light attenuating element positioned between the first lens and the second lens. In this way, in the optical signal transmission path of the optical emission component, by adding the optical attenuation element in the path region of the parallel light, the optical attenuation element is utilized to attenuate the light-emitting power, so that the light-emitting power of the optical emission component is regulated and controlled to the target value.

Description

Light emitting components and optical modules

Technical field

The utility model belongs to the technical field of manufacturing optical communication components, and specifically relates to a light emitting component and an optical module.

Background technique

Optical transmitting components in optical communications usually include an optical transmitter for converting electrical signals into optical signals, an upper part that is coupled to an external optical fiber, an optical fiber port located in the upper part, and an optical transmitter located in the upper part. and a coupling lens in the optical path between the optical fiber port.

During the assembly process of the light emitting component, the existing conventional practice is to adjust the light output power of the light emitting component to a target value by defocusing the coupling lens.

However, this approach will reduce the coupling flat area of the defocused coupling lens, which will lead to increased requirements for coupling device accuracy, glue/welding stress balance, etc. Especially for coupling lenses with inherently small coupling flat areas, the impact is more serious, that is, the requirements for coupling equipment accuracy, glue/welding stress balance, etc. need to be greatly improved, thus greatly increasing the process difficulty.

Contents of the invention

In order to solve the above-mentioned problem that adjusting the optical power in the defocus method will cause the coupling flat area to shrink and thereby increase the process difficulty, the purpose of this utility model is to provide a light emitting component and an optical module.

To achieve the above object, an embodiment provides a light emitting component. The light emitting component includes an optical transmitter that emits an optical signal, and a first lens, a second lens, and an optical fiber port that are sequentially arranged along the transmission path of the optical signal; the optical signal is transmitted between the first lens and the optical fiber port. There is parallel light between the second lenses; the light emitting component further includes a light attenuation element located between the first lens and the second lens.

Preferably, the light attenuating element is a light attenuating film plated on the light exit surface of the first lens or the light entrance surface of the second lens.

Preferably, among the first lens and the second lens, one coated with the light attenuating film is configured as an optical glass body, and the other is configured as an optical glass body or an optical silicon body.

Preferably, the light attenuating element is a light attenuating sheet, and the light attenuating sheet includes a substrate and a light attenuating film plated on the light-transmitting surface of the substrate.

Preferably, the light-passing surface of the substrate includes a first light-passing surface and a second light-passing surface arranged oppositely; the light attenuation film is coated on the first light-passing surface, and the second light-passing surface The surface is coated with antireflection coating;

One of the first light-passing surface and the second light-passing surface is the light-incident surface of the substrate, and the other is the light-emitting surface of the substrate.

Preferably, the substrate is an optical glass sheet of equal thickness.

Preferably, the first light-transmitting surface and the second light-transmitting surface are parallel.

Preferably, the light attenuation sheet is arranged perpendicular to the parallel light or at an angle of 86° to the parallel light.

Preferably, the light attenuating film is an absorptive light attenuating film.

Preferably, the light emitter is a distributed feedback laser or an electroabsorption modulated laser;

The first lens is a collimating lens for collimating optical signals into parallel light, and the second lens is a focusing lens for converging parallel light.

Preferably, the focus of the second lens is located on the light incident end face of the optical fiber at the optical fiber port, or on the light incident end face of a non-fiber light receiving member; the non-fiber light receiving member is arranged on the first Between the two lenses and the optical fiber port, or arranged at the optical fiber port.

Preferably, the light emitting component further includes a third lens located between the light emitter and the first lens, a wavelength division multiplexer located between the first lens and the second lens, Any one or more than two isolators located between the second lens and the optical fiber port.

To achieve the above object, an embodiment provides an optical module. The optical module includes an optical transmitting component, which includes an optical transmitter that emits an optical signal, and a first lens, a second lens, and an optical fiber port that are sequentially arranged along the transmission path of the optical signal; the optical module The optical fiber port is connected to the external optical fiber; the optical signal is parallel light between the first lens and the second lens; the light emitting component also includes a light attenuation element, the light attenuation element is located at between the first lens and the second lens.

Compared with common technology, the technical effect of the present utility model is: in the optical signal transmission path of the light emitting component, by adding a light attenuation element in the transmission path area of the parallel light, the light attenuation element is used to attenuate the outgoing light power. The light output power of the light emitting component is adjusted to the target value. This method of adjusting the light output power has a simple structure and is easy to operate, which effectively solves the problem of narrowing the coupling flat area in the existing technology, thereby reducing the process cost. Difficulty.

Description of the drawings

Figure 1 is a schematic structural diagram of a light emitting component according to Embodiment 1 of the present invention;

Figure 2 is a schematic structural diagram of a light emitting component according to Embodiment 2 of the present invention;

Figure 3 is a schematic structural diagram of a light emitting component according to Embodiment 3 of the present invention;

Figure 4 is a schematic structural diagram of a light emitting component according to Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a light emitting component according to Embodiment 5 of the present invention.

Detailed ways

The present application will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit this application, and any structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are included in the protection scope of this application.

Example 1

Referring to Figure 1, Embodiment 1 of the present invention provides a light emitting component.

The light emitting component includes a light transmitter 10, which can convert a received electrical signal into an optical signal and output the optical signal. In Figure 1, a dotted line illustrates the approximate shape of the optical signal. transmission path. In this embodiment, the light emitter 10 can be configured as a semiconductor laser, specifically a distributed feedback laser (DFB for short), or an electroabsorption modulated laser (Electro absorptionModulated Laser (EML for short)). Of course, it can also be implemented are other light emitters known in the art.

The light emitting component also includes a first lens 20, a second lens 40 and an optical fiber port 50 that are sequentially arranged along the transmission path of the optical signal. The optical signal output by the optical transmitter 10 passes through the first lens 20 and the second lens 40 in sequence, is transmitted to the optical fiber port 50, and is then emitted from the optical fiber port 50 to the external optical fiber of the light emitting component.

The optical signal is parallel light between the first lens 20 and the second lens 40 , specifically, it is parallel light between the light exit surface 21 of the second lens 20 and the light entrance surface 41 of the second lens 40 .

The light emitting component further includes a light attenuating element 30, which is located between the first lens 20 and the second lens 40, that is, located in the transmission path area where the optical signal is parallel light. In this way, by adding the light attenuation element 30 in the transmission path area where the optical signal is parallel light, the light attenuation element 30 is used to attenuate the light output power, so that the light output power of the light emitting component is adjusted to the target value. This kind of The method of adjusting the optical power has a simple structure and is easy to operate, which effectively solves the problem of narrowing the coupling flat area in the existing technology, thereby reducing the process difficulty.

Specifically, the attenuation value of the light attenuation element 30 can be determined according to the actual required optical power attenuation. For example, the attenuation value of the light attenuation element 30 is equal to the light output power of the light emitting assembly without adding the light attenuation element 30 and the total The difference between the stated target values. In actual production, multiple light attenuation elements with different attenuation values can be prepared in advance, and a matching light attenuation element can be selected as the light attenuation element 30 based on the difference in production.

Further, in this embodiment, the light attenuating element 30 is provided as a light attenuating sheet 30 , and the light attenuating sheet 30 is provided independently of the first lens 20 and the second lens 40 . In this way, during the assembly and production process of the light emitting component, the first lens 20 and the second lens 40 can be adjusted in place in the optical transmission path and fixedly installed, and then the light can be adjusted according to the attenuation requirements of the light output power. The attenuation plate 30 only needs to be inserted in the optical transmission path between the first lens 20 and the second lens 40 , and the process is simple and easy to adjust. That is to say, the light emitting component of this embodiment is more convenient for adjusting and controlling the light path. A suitable light attenuating sheet 30 can be inserted after the light path is adjusted, and a light attenuating sheet 30 with appropriate attenuation size can be selected as needed.

The light attenuating sheet 30 includes a substrate 31 and a light attenuating film 32 . Among them, the light attenuating film 32 is plated on the light-passing surface of the substrate 31 and is a core structure that attenuates the optical power; the substrate 31 is the support carrier of the light attenuating film 32, and the light and the light attenuate the film 32 through the substrate 31. The fixed connection of other components of the emission assembly (such as the housing) makes the light attenuating sheet 30 integrally installed and fixed.

In this embodiment, the light attenuating film 32 is configured as an absorptive light attenuating film, which can reduce the reflected light emitted to the light emitter 10 at the light attenuating film 32 , thereby avoiding the performance degradation of the light emitter 10 caused by the reflected light. , return loss, etc. Of course, the light attenuating film 32 can also be changed to other light attenuating films known in the art, such as a reflective light attenuating film, which can also achieve the original intention of the invention of this application.

Further, the light-passing surface of the substrate 31 includes a first light-passing surface and a second light-passing surface that are oppositely arranged, the light-attenuating film 32 is coated on the first light-passing surface, and the light-attenuating sheet 30 further includes The anti-reflection film 33 is plated on the second light-transmitting surface. That is, in this embodiment, the substrate 31 has two light-transmitting surfaces arranged oppositely, one of the light-transmitting surfaces is coated with the light attenuation film 32, and the other light-transmitting surface is coated with the anti-reflection film 33. In this way, while ensuring the attenuation of the optical power, the anti-reflection film 33 can also avoid unexpected light loss caused by light reflection, thereby improving the simplicity and accuracy of the adjustment of the output light power.

Wherein, one of the first light-transmitting surface and the second light-transmitting surface is the light-incident surface of the substrate 31 , and the other is the light-emitting surface of the substrate 31 . In this embodiment, the light-attenuating film 32 is coated on the light-incident surface of the substrate 31 , and the anti-reflection film 33 is coated on the light-emitting surface of the substrate 31 . In a variant embodiment, the positions of the light attenuating film 32 and the anti-reflection film 33 may be interchanged.

Furthermore, the substrate 31 is configured as an optical glass sheet of equal thickness, and the first light-transmitting surface and the second light-transmitting surface are parallel to each other. In this way, the substrate 31 is set to have the same thickness, which ensures parallel light transmission between the first lens 20 and the second lens 40 while having a simple structure and easy processing and installation; the substrate 31 is made of optical glass material, which is convenient for the two The light-passing surface is coated (including the light attenuation film 32 and the anti-reflection film 33).

The respective materials and plating processes of the light attenuating film 32 and the anti-reflection film 33 are implemented using techniques known in the art and will not be described in detail.

In this embodiment, the light attenuation sheet 30 is arranged perpendicular to the parallel light, that is, the parallel light is perpendicular to the light incident surface of the substrate 31 . In this way, the overall optical path arrangement of the light emitting component is facilitated, and repeated adjustment of the positions of other optical devices due to the insertion of the light attenuating sheet 30 is avoided. In a modified embodiment, the light attenuation sheet 30 can also be arranged at an angle of 86° with the parallel light, that is, the parallel light and the normal line of the light incident surface of the substrate 31 are at an angle of 4°. Such an arrangement , the light reflection toward the light emitter 10 at the light attenuation sheet 30 can be further reduced, thereby avoiding performance degradation of the light emitter 10 and return loss caused by light reflection.

Furthermore, in this embodiment, the first lens 20 is configured as a collimating lens for collimating optical signals into parallel light; and the second lens 40 is a focusing lens for converging parallel light. In this way, the optical transmission path of the light emitting component in this embodiment is roughly as follows: the light emitter 10 converts the electrical signal into an optical signal and outputs the optical signal, and the optical signal is emitted backward to the first lens 20, and the first lens 20 The incident light signal is collimated into parallel light; then, the parallel light undergoes power attenuation at the light attenuation film 32 (this embodiment is absorption type power attenuation), and then passes through the substrate 31 and the anti-reflection film 33, and continues to The parallel light is emitted to the second lens 40; the second lens 40 converges the incident optical signals, and the coupled optical signals enter the optical fiber port 50, and finally the light is emitted through the optical fiber port 50.

In addition, in this application, the optical fiber port 50 is a port where the light emitting component is connected to an external optical fiber, and is constructed from part or all of the upper part (receptacle) of the light emitting component. When the optical fiber port 50 is mated with an external optical fiber, the optical signal of the light emitting component is coupled to the light incident end face of the external optical fiber at the optical fiber port 50 .

Of course, the light emitting component may also include other optical devices, such as a third lens located between the light emitter 10 and the first lens 20 (such as the third lens 60 in Embodiments 4 and 5 described later). ), any one or two of a wavelength division multiplexer (Wavelength Division Multiplexing, WDM for short) located between the first lens 20 and the second lens 40 , and an isolator located between the second lens 40 and the optical fiber port 50 above.

In one embodiment, the focus of the second lens 20 (ie, the focusing lens) is located on the light incident end face of the external optical fiber at the optical fiber port 50. In this way, the second lens 40 focuses the incident optical signal onto the external optical fiber. The light incident end face of the second lens 20 (that is, the focusing lens) is located on the light incident end face of the non-fiber light receiving member, and the non-fiber light receiving member is, for example, arranged on the second light incident end face. Between the second lens 20 and the optical fiber port 50 , or arranged at the optical fiber port 50 .

Further, in this embodiment, the material of the first lens 20 is optical silicon body, and its shape is illustrated as a double-sided convex lens in the figure; the material of the second lens 40 is an optical glass body, and its shape is illustrated as a double-sided lens in the figure. Convex lens. It can be understood that on the basis of achieving the original intention of the invention of this application, the respective materials and shapes of the first lens 20 and the second lens 40 are not limited thereto. For example, the materials of the first lens 20 and the second lens 40 can be set to optical silicon body, The optical glass body or other known materials in the field can be selected. For example, the two can be configured as a single convex lens, a concave and convex lens or other lenses according to the optical path requirements, as long as a parallel light transmission path area is formed between the two. In addition, it is not excluded that in the complete optical transmission path of the light emitting component, in addition to between the first lens 20 and the second lens 40 , there are other path areas that are also parallel light.

Example 2

Referring to Figure 2, Embodiment 2 of the present invention provides a light emitting component. The only difference between Embodiment 2 and Embodiment 1 is:

In Embodiment 1, the light attenuation element 30 is set as a light attenuation sheet 30, which makes it easier to adjust and control the light path. After the light path is adjusted, a suitable light attenuation sheet 30 can be inserted, and a suitable attenuation size can be selected as needed. Light attenuating sheet 30; and in this embodiment 2, the light attenuating element is a light attenuating film 30a plated on the light exit surface 21 of the first lens 20. That is, it is equivalent to canceling the light attenuating sheet 30 in Embodiment 1, and directly coating the light attenuating film 30a on the light exit surface 21 of the first lens 20 . In this way, compared with Embodiment 1, the light emitting component can be further miniaturized, the structure can be more compact, and the installation process can be simpler.

Among them, in this embodiment, the light attenuating film 30a is preferably configured as an absorptive light attenuating film, but of course, it is not limited to this.

In addition, in this embodiment, the material of the first lens 20 is preferably set to an optical glass body, so as to facilitate the implementation of the coating process.

Example 3

Referring to Figure 3, Embodiment 3 of the present invention provides a light emitting component. The only difference between Embodiment 3 and Embodiment 2 is:

In Embodiment 2, the light-attenuating film 30a is coated on the light-emitting surface 21 of the first lens 20; in Embodiment 3, the light-attenuating film is not plated on the light-emitting surface 21 of the first lens 20, but instead The light attenuation film 30b is coated on the light incident surface 41 of the second lens 40 .

Example 4

Referring to FIG. 4 , Embodiment 4 of the present invention provides a light emitting component, which includes a light emitter 10 , a first lens 20 , a light attenuation element 30 , a second lens 40 and an optical fiber port 50 . The light attenuating element 30 is a light attenuating sheet including a substrate 31 , a light attenuating film 32 and an anti-reflection film 33 . The only difference between this Embodiment 4 and Embodiment 1 is:

In Embodiment 1, the light emitting component may or may not include a third lens located between the light emitter 10 and the first lens 20; in Embodiment 4, referring to FIG. 4, the light emitting component may include a third lens located between the light emitter 10 and the first lens 20. A third lens 60 between the light emitter 10 and the first lens 20 . The optical signal emitted by the light emitter 10 first passes through the third lens 60 and then is coupled into the first lens 20 .

Among them, the materials and shapes of the third lens 60 , the first lens 20 and the second lens 40 are not limited to those shown in the figures. For example, the materials of the three lenses 60 , 20 , and 40 can be made of optical silicon bodies, optical glass bodies, or other materials optional in the field. Other known materials, such as the shape of the three lenses, can be configured as a single convex lens, a meniscus lens, a double-sided concave lens or other lenses according to the optical path requirements.

Example 5

Referring to Figure 5, Embodiment 5 of the present invention provides a light emitting component. The only difference between Embodiment 5 and Embodiment 4 is:

In Embodiment 4, the light attenuating element 30 is configured as a light attenuating sheet 30; and in Embodiment 5, the light attenuating element is a light attenuating film 30d plated on the light exit surface 21 of the first lens 20. That is, it is equivalent to canceling the light attenuating sheet 30 in Embodiment 4, and directly coating the light attenuating film 30d on the light exit surface 21 of the first lens 20 . In this way, compared with Embodiment 4, the light emitting component can be further miniaturized, the structure can be more compact, and the installation process can be simpler.

Among them, in this embodiment, the light attenuating film 30d is preferably configured as an absorptive light attenuating film, but of course, it is not limited to this.

In addition, in this embodiment, the material of the first lens 20 is preferably set to an optical glass body, so as to facilitate the implementation of the coating process.

It can be understood that as a modified example of this embodiment, it is also possible to cancel the coating of the light attenuating film 30d on the light exit surface 21 of the first lens 20, and instead change the light attenuating film 30d to be coated on the second lens 40. on the light incident surface 41.

Example 6

This embodiment 6 provides an optical module. The optical module includes a light emitting component. The light emitting component can be implemented according to any one of the foregoing embodiments 1 to 5 or modified embodiments.

Specifically, the light emitting component includes an optical emitter, a first lens, a second lens and an optical fiber port that are sequentially arranged along the transmission path of the optical signal. The optical signal is transmitted between the first lens and the second optical fiber port. There is parallel light between the lenses; the light emitting component also includes a light attenuation element between the first lens and the second lens; the optical module is connected to an external optical fiber through the optical fiber port.

In this way, by adding a light attenuation component and using the light attenuation component to attenuate the light output power, the light output power of the optical module is adjusted to the target value. This method of adjusting the light output power has a simple structure, is easy to operate, and is a good solution to the problem. This solves the problem of reducing the coupling flat area existing in the prior art, thus reducing the process difficulty.

Further, the optical module in this embodiment may be an optical transmitter (TOSA) that only has an optical sending function, or an integrated optical transceiver that has both an optical sending function and an optical receiving function. Wherein, when the optical module is implemented as an integrated optical transceiver, the optical module further includes a light receiving component, and the light receiving component includes a light detector, which converts the external light signal received by the optical module into for electrical signals.

Furthermore, the optical module can be adapted to transmit and/or receive optical signals at various different data rates per second, including but not limited to: 1 gigabit per second (Gbit), 2Gbit , 4Gbit, 8Gbit, 10Gbit, 20Gbit, 100Gbit, 200Gbit or other bandwidth optical fiber links. Additionally, other types and configurations of optical modules, or optical modules having components that differ in some respects from those shown and described herein, may also benefit from the principles disclosed herein.

To sum up, the beneficial effect of this embodiment is that in the optical signal transmission path of the light emitting component, by adding a light attenuation element in the transmission path area of the parallel light, the light attenuation element is used to attenuate the outgoing light power, so that The light output power of the light emitting component is adjusted to the target value. This method of adjusting the light output power has a simple structure and is easy to operate, which effectively solves the problem of narrowing the coupling flat area in the existing technology, thereby reducing the process difficulty. .

It should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity. Persons skilled in the art should take the specification as a whole and understand each individual solution. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of feasible implementations of the present application. They are not intended to limit the protection scope of the present application. Any equivalent implementations or implementations that do not deviate from the technical spirit of the present application or All changes should be included in the protection scope of this application.

Claims (12)

1. An optical emission component comprises an optical emitter for emitting an optical signal, and a first lens, a second lens and an optical fiber port which are sequentially arranged along a transmission path of the optical signal; the optical signal is parallel light between the first lens and the second lens; wherein the light emitting assembly further comprises a light attenuating element located between the first lens and the second lens.

2. The light emitting assembly of claim 1, wherein the light attenuating element is a light attenuating film plated on the light exit surface of the first lens or the light entrance surface of the second lens.

3. The light emitting assembly according to claim 2, wherein one of the first lens and the second lens, which is plated with the light attenuating film, is provided as an optical glass body, and the other is provided as an optical glass body or an optical silicon body.

4. A light emitting assembly according to claim 1, wherein the light attenuating element is a light attenuating sheet comprising a substrate and a light attenuating film plated on a light passing surface of the substrate.

5. The light emitting assembly of claim 4, wherein the light passing surface of the substrate comprises a first light passing surface and a second light passing surface disposed opposite each other; the light attenuation film is coated on the first light passing surface, and the second light passing surface is coated with an antireflection film;

one of the first light-passing surface and the second light-passing surface is the light-in surface of the substrate, and the other is the light-out surface of the substrate.

6. A light emitting assembly according to claim 5 wherein the substrate is provided as an equal thickness optical glass sheet; the first light-passing surface is parallel to the second light-passing surface.

7. A light emitting assembly according to claim 6, wherein the light attenuation sheet is arranged perpendicular to the parallel light or at an angle of 86 ° to the parallel light.

8. A light emitting assembly according to any one of claims 2 to 7 wherein the light attenuating film is an absorbing light attenuating film.

9. The light emitting assembly of claim 1, wherein the light emitter is a distributed feedback laser or an electroabsorption modulated laser;

the first lens is a collimating lens for collimating the optical signal into parallel light, and the second lens is a focusing lens for converging the parallel light.

10. The light emitting assembly of claim 9 wherein the focal point of the second lens is located on the light entrance end face of the optical fiber at the optical fiber port or on the light entrance end face of a non-optical fiber light receiving member; the non-fiber light receiver is disposed between the second lens and the fiber port or at the fiber port.

11. The light emitting assembly of claim 1 further comprising any one or more of a third lens positioned between the light emitter and the first lens, a wavelength division multiplexer positioned between the first lens and the second lens, and an isolator positioned between the second lens and the fiber port.

12. An optical module comprising the light emitting assembly of any one of claims 1 to 11, the optical module interfacing with an external optical fiber through the optical fiber port.