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 assembly and light module

Technical Field

The utility model belongs to the technical field of manufacturing of optical communication elements, and particularly relates to an optical emission assembly and an optical module.

Background

An optical transmission assembly in optical communications generally includes an optical transmitter for converting an electrical signal to an optical signal, a top piece coupled to an external optical fiber, an optical fiber port in the top piece, and a coupling lens in an optical path between the optical transmitter and the optical fiber port.

In the process of assembling the light emitting module, it is conventional practice to adjust the light output of the light emitting module to a target value by defocusing the coupling lens.

However, this reduces the coupling flat area of the out-of-focus coupling lens, which in turn leads to increased requirements in terms of coupling equipment accuracy, glue/soldering stress balance, etc. Especially for coupling lenses with coupling flat areas which are originally smaller, the influence is more serious, namely, the requirements on the accuracy of coupling equipment, the glue/welding stress balance and the like are more required to be greatly improved, so that the process difficulty is greatly increased.

Disclosure of Invention

In order to solve the problem that the coupling flat area is reduced and the process difficulty is increased due to the fact that the light-emitting power is adjusted in the out-of-focus mode, the utility model aims to provide a light emitting assembly and a light module.

To achieve the above object, an embodiment provides a light emitting assembly. 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.

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

Preferably, one of the first lens and the second lens, which is plated with the light attenuation film, is provided as an optical glass body, and the other is provided as an optical glass body or an optical silicon body.

Preferably, the light attenuation element is a light attenuation sheet, and the light attenuation sheet comprises a substrate and a light attenuation film plated on a light passing surface of the substrate.

Preferably, the light-passing surface of the substrate comprises a first light-passing surface and a second light-passing surface which are oppositely arranged; 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.

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

Preferably, the first light passing surface and the second light passing 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 attenuation film is an absorption type light attenuation film.

Preferably, the optical transmitter 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.

Preferably, the focal point of the second lens is located on the light-entering end face of the optical fiber at the optical fiber port or on the light-entering end face of the 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.

Preferably, the light emitting assembly further comprises any one or more of 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, and an isolator located between the second lens and the optical fiber port.

To achieve the above object, an embodiment provides an optical module. The optical module comprises an optical emission assembly, wherein the optical emission assembly 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 module is in butt joint with an external optical fiber through the optical fiber port; 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.

Compared with the common technology, the utility model has the technical effects that: in the optical signal transmission path of the optical emission component, the optical attenuation element is added in the transmission path area of the parallel light, and 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 a target value.

Drawings

Fig. 1 is a schematic structural view of a light emitting device of embodiment 1 of the present utility model;

fig. 2 is a schematic structural view of a light emitting device of embodiment 2 of the present utility model;

fig. 3 is a schematic structural view of a light emitting element of embodiment 3 of the present utility model;

fig. 4 is a schematic structural view of a light emitting element of embodiment 4 of the present utility model;

fig. 5 is a schematic structural view of a light emitting element of embodiment 5 of the present utility model.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the utility model and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the utility model.

Example 1

Referring to fig. 1, embodiment 1 of the present utility model provides a light emitting module.

The light emitting assembly comprises a light emitter 10 which can convert a received electrical signal into an optical signal and output the optical signal, the general transmission path of which is illustrated in broken lines in fig. 1. In this embodiment, the optical transmitter 10 may be configured as a semiconductor laser, specifically, a distributed feedback laser (Distributed feedback laser, abbreviated as DFB), or an electroabsorption modulated laser (Electro absorption Modulated Laser, abbreviated as EML), but may be implemented as other optical transmitters known in the art.

The light emitting assembly further includes a first lens 20, a second lens 40, and an optical fiber port 50 sequentially disposed along a 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 optical transmitting assembly.

The optical signal is parallel between the first lens 20 and the second lens 40, specifically, 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 assembly further comprises a light attenuating element 30, which light attenuating element 30 is located between the first lens 20 and the second lens 40, i.e. in the region of the transmission path of the light signal in parallel light. Therefore, by adding the optical attenuation element 30 in the transmission path region of the optical signal in parallel light, the optical attenuation element 30 is utilized to attenuate the light-emitting power, so that the light-emitting power of the light emitting component is regulated and controlled to the target value.

Specifically, the attenuation value of the light attenuation element 30 may be determined according to the actually required attenuation amount of the light power, for example, the attenuation value of the light attenuation element 30 is equal to the difference between the output light power of the light emitting module without the light attenuation element 30 added and the target value. In actual production, a plurality of light attenuation elements having different attenuation values may be prepared in advance, and a matching light attenuation element may be selected as the light attenuation element 30 according to the difference in production.

Further, in the present embodiment, the light attenuation element 30 is provided as the light attenuation sheet 30, and the light attenuation sheet 30 is provided independently of the first lens 20 and the second lens 40. In this way, in the assembly production process of the light emitting assembly, the first lens 20 and the second lens 40 can be adjusted in place in the optical transmission path and are fixedly installed, and then the light attenuation sheet 30 is inserted into the optical transmission path between the first lens 20 and the second lens 40 according to the attenuation requirement of the light emitting power, so that the process is simple and easy to adjust. That is, the light emitting assembly of this embodiment is more convenient for adjustment and control of the light path, and can be inserted with a suitable light attenuation sheet 30 after the light path is adjusted, and can select a light attenuation sheet 30 with a suitable attenuation size as required.

The light attenuation sheet 30 includes a substrate 31 and a light attenuation film 32. Wherein, the light attenuation film 32 is plated on the light transmission surface of the substrate 31, and is a core structure for attenuating the light power; the substrate 31 is a support carrier for the light attenuation film 32, and the light attenuation sheet 30 is integrally mounted and fixed by fixedly connecting the substrate 31 with other components (such as a shell) of the light emitting assembly.

In the present embodiment, the light attenuation film 32 is provided as an absorption type light attenuation film, so that the reflected light directed to the light emitter 10 at the light attenuation film 32 can be reduced, thereby avoiding the degradation of the performance, return loss, and the like of the light emitter 10 caused by the reflected light. Of course, the light-attenuating film 32 may be changed to another light-attenuating film known in the art, for example, a reflective light-attenuating film, and the object of the present utility model can be achieved.

Further, the light-passing surface of the substrate 31 includes a first light-passing surface and a second light-passing surface that are disposed opposite to each other, the light-attenuating film 32 is coated on the first light-passing surface, and the light-attenuating sheet 30 further includes an antireflection film 33 coated on the second light-passing surface. That is, in the present embodiment, the substrate 31 has two light-transmitting surfaces disposed opposite to each other, one of which is coated with the light-attenuating film 32 and the other of which is coated with the antireflection film 33. Thus, while ensuring the attenuation of the optical power, the anti-reflection film 33 can also avoid unexpected optical loss caused by light reflection, thereby improving the simplification and accuracy of the adjustment of the optical output power.

One of the first light-passing surface and the second light-passing surface is a light-entering surface of the substrate 31, and the other is a light-exiting 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 emergent surface of the substrate 31. In a variant embodiment, the positions of the light attenuating film 32 and the antireflection film 33 may be interchanged.

Further, the substrate 31 is configured as an optical glass sheet having an equal thickness, and the first light passing surface and the second light passing surface are parallel and opposite to each other. Thus, the substrate 31 is arranged to have equal thickness, and the structure is simple and the processing and the installation are easy while the parallel light transmission between the first lens 20 and the second lens 40 are ensured; the substrate 31 is made of an optical glass material, and is favorable for coating films (comprising a coated light attenuation film 32 and an antireflection film 33) on two light passing surfaces of the substrate.

The respective materials and plating processes of the light attenuation film 32 and the antireflection film 33 are performed by techniques known in the art, and will not be described in detail.

In the present embodiment, the light attenuation sheet 30 is arranged perpendicularly 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 light path arrangement of the light emitting assembly is facilitated, and repeated adjustment of the positions of other optical devices due to insertion of the light attenuation sheet 30 is avoided. In a variant embodiment, the light attenuation sheet 30 may be disposed at an angle of 86 ° with respect to the parallel light, that is, the parallel light forms an angle of 4 ° with respect to the normal line of the light incident surface of the substrate 31, so that the light reflection at the light attenuation sheet 30 to the light emitter 10 can be further reduced, thereby avoiding the performance degradation, return loss, etc. of the light emitter 10 caused by the light reflection.

Further, in the present embodiment, the first lens 20 is provided as a collimator lens that collimates the optical signal into parallel light; the second lens 40 is a focusing lens that condenses parallel light. Thus, the optical transmission path of the light emitting component in this embodiment is substantially: the optical transmitter 10 converts the electric signal into an optical signal and outputs the optical signal, the optical signal is directed backward to the first lens 20, and the first lens 20 collimates the incident optical signal into parallel light; then, the parallel light is subjected to power attenuation (absorption type power attenuation in this embodiment) at the light attenuation film 32, then passes through the substrate 31 and the antireflection film 33, and is continuously emitted to the second lens 40 as parallel light; the second lens 40 converges the incident optical signals, and the coupled optical signals enter the optical fiber port 50, and finally light is implemented through the optical fiber port 50.

In the present utility model, the optical fiber port 50 is a port at which the light emitting module is butted with an external optical fiber, and is configured by a part or the whole of a top member (Receptacle) of the light emitting module. When the fiber port 50 is mated with an external optical fiber, the optical signal of the light emitting assembly is coupled onto the light entrance end face of the external optical fiber at the fiber port 50.

Of course, the light emitting assembly may further include other optical devices, such as any one or more of a third lens (e.g., third lens 60 in embodiments 4 and 5 described later) located between the light emitter 10 and the first lens 20, a wavelength division multiplexer (Wavelength Division Multiplexing, abbreviated as WDM) 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.

In one embodiment, the focal point of the second lens 20 (i.e., the focusing lens) is located on the light-entering end face of the external optical fiber at the fiber port 50, such that the second lens 40 focuses the incident optical signal onto the light-entering end face of the external optical fiber; while in a variant embodiment the focal point of the second lens 20, i.e. the focusing lens, is located on the light entrance end face of a non-fiber light receiving member, which is arranged for example between the second lens 20 and the fiber port 50 or at the fiber port 50.

Further, in the present embodiment, the material of the first lens 20 is an optical silicon body, and the shape thereof is exemplified as a biconvex lens in the figure; the second lens 40 is made of an optical glass body, and its shape is exemplified as a biconvex lens in the drawing. It should be understood that, in order to achieve the purpose of the present utility model, the respective materials and the respective shapes of the first lens element 20 and the second lens element 40 are not limited thereto, and for example, both materials may be optical silicon, optical glass or other materials that are optional in the art, for example, both materials may be configured as single convex lens, concave convex lens or other lenses according to the optical path requirements, and only a parallel light transmission path region is formed between the two materials. In addition, it is not excluded that in the complete optical transmission path of the light emitting assembly, there is also other path area between the first lens 20 and the second lens 40, which is also parallel light.

Example 2

Referring to fig. 2, embodiment 2 of the present utility model provides a light emitting module. This embodiment 2 differs from embodiment 1 only in that:

in embodiment 1, the light attenuation element 30 is configured as the light attenuation sheet 30, so that the adjustment and control of the light path are more convenient, the light attenuation sheet 30 with proper attenuation size can be inserted after the light path is adjusted, and the light attenuation sheet 30 with proper attenuation size can be selected according to the requirement; in embodiment 2, the light attenuating element is a light attenuating film 30a coated on the light emitting surface 21 of the first lens 20. That is, the light attenuation sheet 30 in example 1 is omitted, and the light attenuation film 30a is directly plated on the light exit surface 21 of the first lens 20. Thus, further miniaturization of the light emitting module can be facilitated, the structure is more compact, and the mounting process is simpler than in embodiment 1.

In this embodiment, the light attenuation film 30a is preferably an absorption type light attenuation film, but is not limited thereto.

In addition, in the present embodiment, the material of the first lens 20 is preferably an optical glass body, so that the implementation of the coating process is facilitated.

Example 3

Referring to fig. 3, embodiment 3 of the present utility model provides a light emitting module. This embodiment 3 differs from embodiment 2 only in that:

in embodiment 2, the light attenuation film 30a is plated on the light exit surface 21 of the first lens 20; in embodiment 3, the light-attenuating film 30b is plated on the light-incident surface 41 of the second lens 40 instead of the light-attenuating film being plated on the light-emergent surface 21 of the first lens 20.

Example 4

Referring to fig. 4, embodiment 4 of the present utility model provides a light emitting assembly including a light emitter 10, a first lens 20, a light attenuating element 30, a second lens 40, and a fiber optic port 50. The light attenuation element 30 is a light attenuation sheet including a substrate 31, a light attenuation film 32, and an antireflection film 33. This example 4 differs from example 1 only in that:

in embodiment 1, the light emitting assembly may or may not include a third lens between the light emitter 10 and the first lens 20; in this embodiment 4, referring to fig. 4, the light emitting assembly includes a third lens 60 between the light emitter 10 and the first lens 20. The optical signal emitted from the optical transmitter 10 passes through the third lens 60 and is coupled into the first lens 20.

The materials and shapes of the third lens element 60, the first lens element 20, and the second lens element 40 are not limited to the illustration, and may be, for example, optical silicon, optical glass, or any other materials known in the art, for example, single convex lens, concave-convex lens, double concave lens, or other lenses according to the optical path requirements.

Example 5

Referring to fig. 5, embodiment 5 of the present utility model provides a light emitting assembly. This embodiment 5 differs from embodiment 4 only in that:

in embodiment 4, the light attenuation element 30 is provided as the light attenuation sheet 30; in embodiment 5, the light attenuating element is a light attenuating film 30d coated on the light emitting surface 21 of the first lens 20. That is, the light attenuation sheet 30 in example 4 is omitted, and the light attenuation film 30d is directly coated on the light exit surface 21 of the first lens 20. Thus, further miniaturization of the light emitting module can be facilitated, the structure is more compact, and the mounting process is simpler than in embodiment 4.

In this embodiment, the light attenuation film 30d is preferably an absorption type light attenuation film, but is not limited thereto.

In addition, in the present embodiment, the material of the first lens 20 is preferably an optical glass body, so that the implementation of the coating process is facilitated.

It is to be understood that, as a modification of the present embodiment, the plating of the light-attenuating film 30d on the light-emitting surface 21 of the first lens 20 may be omitted, and the light-attenuating film 30d may be modified to be plated on the light-entering surface 41 of the second lens 40.

Example 6

Embodiment 6 provides an optical module comprising a light emitting assembly, which may be implemented according to any one of the previous embodiments 1 to 5 or a variant embodiment.

Specifically, the light emitting component comprises a light emitter, a first lens, a second lens and an optical fiber port which are sequentially arranged along a transmission path of the light signal, wherein the light signal is parallel light between the first lens and the second lens; the light emitting assembly further includes a light attenuating element between the first lens and the second lens; the optical module is butted with an external optical fiber through the optical fiber port.

Therefore, by adding the light attenuation element and utilizing the light attenuation element to attenuate the light output power, the light output power of the light module is regulated and controlled to a target value, and the mode for regulating the light output power has the advantages of simple structure and easy operation, well solves the problem of reducing the coupling flat area in the prior art, and further reduces the process difficulty.

Further, the optical module of the present embodiment may specifically be an optical Transmitter (TOSA) having only an optical transmission function, or an optical transceiver having both an optical transmission function and an optical reception function. When the optical module is implemented as an optical transceiver, the optical module further comprises an optical receiving assembly, and the optical receiving assembly comprises an optical detector, and the optical detector converts an external optical signal received by the optical module into an electrical signal.

Furthermore, the optical module can be adapted to transmit and/or receive optical signals at a variety of 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. Furthermore, other types and configurations of light modules or light modules having elements that are different in some respects than those shown and described herein may also benefit from the principles disclosed herein.

In summary, the beneficial effects of the present embodiment are as follows: in the optical signal transmission path of the optical emission component, the optical attenuation element is added in the transmission path area of the parallel light, and 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 a target value.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

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.