CN210465769U

CN210465769U - Optical module with at least two lasers

Info

Publication number: CN210465769U
Application number: CN201920997884.0U
Authority: CN
Inventors: 曹晨鹏; 李连城; 周益平
Original assignee: Shenzhen Sont Technology Co ltd
Current assignee: Jiangxi Sont Communication Technology Co ltd; Shenzhen Xunte Communication Technology Co ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-05-05
Anticipated expiration: 2029-06-29

Abstract

The utility model discloses an optical module with two at least way lasers, optical module with two at least way lasers includes baffle, two at least lasers and two at least monitoring light detector, every the laser correspondence is provided with one monitoring light detector, every adjacent two be provided with between the monitoring light detector the baffle, the baffle is used for sheltering from the light that comes from adjacent laser. According to the utility model discloses an optical module with two way at least lasers can effectively reduce adjacent laser light to crosstalk.

Description

Optical module with at least two lasers

Technical Field

The utility model belongs to the technical field of optical communication, specifically, relate to an optical module with two way at least lasers.

Background

To meet the explosive growth of data service business, the trend of higher speed and higher density of optical-electrical interconnection modules of enterprise networks and data centers is developing. Under the condition that the unit bit rate of the photoelectric device is extremely developed, an optical module of a parallel optical cable becomes a scheme for further improving the receiving and sending efficiency, for example, protocol modules such as a four-channel SFP interface (QSFP) based On a parallel optical fiber plug (MPO) interface and a 12-time miniaturized hot-Pluggable (CXP) interface (QSFP) based On 120 GB/s.

At present, common packaging technologies for optical modules include Transistor outline package (TO-CAN for short) and Chip On Board (COB) technologies. At present, an optical module uses a monitoring optical Detector (MPD for short) to Monitor the optical power of a laser, and changes in the power value can reflect changes in the performance of the laser after long-time operation in different environments.

SUMMERY OF THE UTILITY MODEL

When multiple lasers are used simultaneously, optical signals emitted by the multiple lasers are inevitably reflected to different degrees when passing through various optical elements, so that stray light is formed. After multiple reflection and transmission, the stray light will interfere with the light monitoring photodetector, but mainly comes from crosstalk between adjacent laser light lines. Therefore, it is important to solve the problem of crosstalk of light between adjacent lasers.

An object of the utility model is to provide an optical module with two at least way lasers can effectively reduce adjacent laser light line optical crosstalk, solves the index problem of the high sensitivity that optical crosstalk influences monitoring light detector and reports, simultaneously, has also played the spacing effect of monitoring light detector.

The utility model discloses a following technical scheme realizes: the optical module with at least two lasers comprises a baffle used for blocking light rays from adjacent lasers, at least two lasers provided with optical waveguide devices and at least two monitoring photodetectors, wherein each laser corresponds to one monitoring photodetector, and the baffle is located between the adjacent monitoring photodetectors.

Further, in the optical module with at least two lasers according to the above technical solution, the height of the baffle is higher than the height of the monitoring photodetector.

Further, in the optical module with at least two lasers according to the above technical solution, the baffle is disposed on a substrate of the monitoring photodetector.

Further, according to the optical module with at least two lasers in the above technical scheme, the monitoring light detector is arranged behind the lasers, and the monitoring light detector is provided with a photosensitive surface for receiving light of the lasers.

Further, in the optical module with at least two lasers according to the above technical solution, the optical waveguide device is located on a central line of the photosurface, and the photosurface and the optical waveguide device form an angle of 90 °.

Further, in the optical module with at least two lasers in the above technical solution, a light absorption coating is disposed on the surface of the baffle.

The utility model has the advantages that: the utility model discloses an optical module with two at least way lasers, because be provided with between the monitoring light detector the baffle, just the baffle is provided with the extinction coating, consequently, the optical module with two at least way lasers can effectively reduce adjacent laser light line optical crosstalk, solves the optical crosstalk influence the problem of the high sensitivity that monitoring light detector reported is reported.

Drawings

Fig. 1 is a schematic diagram of an optical module having at least two lasers according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the optical module of FIG. 1 having at least two lasers;

FIG. 3 is a schematic right view of the optical module of FIG. 1 having at least two lasers;

FIG. 4 is a baffle sizing schematic of the optical module of FIG. 1 having at least two lasers;

FIG. 5 is a schematic plan view of the important parts of the optical module of FIG. 1 having at least two lasers;

the designations in the figures have the following meanings:

an optical module-1000 having at least two lasers; a substrate-100; monitoring the light detector-200; a baffle-300; a laser-400; base block-500; metal coating-110; a photosurface-210; light absorbing coating-310; an optical waveguide device-410;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 5, the optical module 1000 with at least two lasers comprises a shutter 300, at least two lasers 400 and at least two monitoring photodetectors 200. Each laser 400 corresponds to each monitoring photodetector 200. The monitoring light detector 200 is used to monitor the light power of the laser 400. Between adjacent ones of the monitoring photodetectors 200, a blocking plate 300 is disposed, whereby the blocking plate 300 blocks light from adjacent lasers 400, preventing light crosstalk from light from adjacent lasers.

In the optical module 1000 having at least two lasers according to the present embodiment, the baffle 300 is mounted on the substrate 100 of the monitoring photodetector.

As shown in fig. 1 to 3, the laser 400 is disposed on a base block 500, and the base block 500 is electrically connected to the laser 400.

As shown in fig. 1, the shutter 300 and the monitoring light detector 200 are mounted on the substrate 100. The barrier 300 is arranged side by side with the monitoring light detector 200, i.e. the barrier 300 is in the same line with the monitoring light detector 200.

As shown in fig. 1 to 3, the baffle 300 is spaced apart from the monitoring light detector 200, the spacing distance between the baffle 300 and the monitoring light detector 200 is determined according to the distance between the laser 400 and the monitoring light detector 200 and the angle of the light emitted from the rear of the laser 400, and the spacing distance between the baffle 300 and the monitoring light detector 200 is as small as possible, although the spacing distance between the baffle 300 and the monitoring light detector 200 may be zero.

In the optical module 1000 having at least two lasers according to the above embodiment, the substrate 100 is made of an insulating material.

In this embodiment, the material of the substrate 100 is preferably ceramic, but the material of the substrate 100 may be other insulating materials, such as: marble, glass, rubber, resin, and the like, as long as insulation can be achieved, and therefore, description thereof will not be repeated.

As shown in fig. 1 to 3, a metal coating 110 is plated on the upper portion of the substrate 100, the metal coating 110 is located behind the baffle 300, the metal coating 110 is electrically conductive, and the metal coating 110 is used for connecting with the connecting wires of the monitoring light detector 200.

As shown in fig. 1, the monitoring light detector 200 is disposed behind the laser 400.

In the optical module 1000 with at least two lasers according to the above embodiment, the upper end of the monitoring light detector 200 is provided with a photosurface 210, and the photosurface 210 is used for receiving light of the laser 400.

As shown in fig. 2, in the present embodiment, the photosensitive surface 210 is at 90 ° or substantially 90 ° to the optical waveguide device 410.

As shown in fig. 1, the placement of the photosurface 210 at 90 ° or approximately 90 ° to the optical waveguide device 410 may reduce interference of the laser 400 with the photosurface 210 adjacent the rear of the laser 400.

As shown in fig. 1-3, the laser 400 includes an optical waveguide device 410, and the optical waveguide device 410 is located on a centerline of the photosurface 210.

As shown in fig. 3, the optical waveguide device 410 is located on the center line of the photosensitive surface 210, so that the light of the laser 400 can be emitted as far as possible onto the optical waveguide device 410(optical waveguide) which is a medium device for guiding the light wave to propagate therein, and is also called a medium optical waveguide device.

The optical waveguide device 410 is a guiding structure made of an optically transparent medium such as quartz glass for transmitting electromagnetic waves at optical frequencies.

As shown in fig. 1 to 3, the height of the blocking plate 300 is higher than the height of the monitoring light detector 200.

As shown in fig. 1, when the height of the baffle 300 is equal to or lower than the height of the monitoring light detector 200, the baffle 300 can not substantially block the reflected light from entering the photosurface 210, and therefore, the height of the baffle 300 is higher than the height of the monitoring light detector 200.

Of course, the height of the baffle 300 is not as high as possible, the baffle 300 is too high to facilitate the wiring between the monitoring light detector 200 and the substrate 100, and the height of the baffle 300 is determined according to the distance between the laser 400 and the monitoring light detector 200 and the angle of the light emitted from the rear of the laser 400.

Wherein X (known) is the sum of the width of the monitoring light detector and the distance between the left and right baffles and the monitoring light detector, and theta (known) isThe emitting angle formed by the light of the laser and the front and back directions, h is the distance between the laser and the baffle plate, so that the method can be used according to the following formula

The height of the baffle is determined.

In the optical module 1000 with at least two lasers according to the above embodiment, the light absorbing coating 310 is disposed on the whole of the baffle 300.

Wherein the baffle 300 is integrally provided with a light absorbing coating 310 for preventing the light of the laser 400 from being reflected on the baffle 300, thereby reducing interference with the photosurface 210.

A light absorbing coating 310 may be disposed on the upper end surface of the substrate 100 to reduce reflection of light from the laser 400.

The utility model discloses an optical module 1000 with two at least way lasers, because be provided with between the monitoring light detector 200 baffle 300, just baffle 300 is provided with extinction coating 310, consequently, optical module 1000 with two at least way lasers can effectively reduce adjacent laser 400 light optical crosstalk, solves the optical crosstalk influence the problem of the high sensitivity that monitoring light detector 200 reported on, simultaneously, because monitoring light detector 200 rear end is provided with base plate 100, consequently, optical module 1000 with two at least way lasers also can realize right monitoring light detector 200 is spacing effect.

In the description of the present invention, "light" refers to light emitted by the back end of the laser, and furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present invention.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise direct contact between the first and second features through another feature not in direct contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An optical module (1000) with at least two lasers, characterized in that the optical module (1000) with at least two lasers comprises a baffle (300) for shielding light from adjacent lasers (400), at least two lasers (400) provided with optical waveguide devices (410) and at least two monitoring photodetectors (200), each laser (400) and each monitoring photodetector (200) are in one-to-one correspondence, and the baffle (300) is located between adjacent monitoring photodetectors (200).

2. Optical module (1000) with at least two lasers according to claim 1 characterized in that the height of the baffle (300) is higher than the height of the monitoring light detector (200).

3. Optical module (1000) with at least two lasers according to claim 2, characterized in that the baffle (300) is arranged on the substrate (100) of the monitoring photodetector (200).

4. Optical module (1000) with at least two lasers according to claim 1, characterized in that the monitoring photodetector (200) is arranged behind the laser (400), the monitoring photodetector (200) being provided with a photosurface (210), the photosurface (210) being adapted to receive light of the laser (400).

5. Optical module (1000) with at least two lasers according to claim 4 characterized in that the optical waveguide device (410) is located on the photosurface (210) center line and the photosurface (210) is 90 ° from the optical waveguide device (410).

6. The light module (1000) with at least two lasers according to claim 1, characterized in that a light absorbing coating (310) is provided on the surface of the baffle (300).