CN108418635A - An eight-channel high-speed optical transmission device - Google Patents

Abstract

The invention relates to the field of optical communication technology. The embodiment specifically discloses an eight-channel high-speed optical transmission device, which includes a flexible board arranged at one end outside the casing, and also includes a first electro-optical conversion component and a second electro-optical conversion assembly arranged inside the casing. The conversion assembly also includes a first light output unit and a second light output unit arranged at the other end outside the casing. The optical transmission device uses two sets of electro-optical conversion components to perform eight-channel electro-optic conversion at the same time, and adopts a structure in which two optical output units output two channels of light at the same time, which solves the packaging problem of 200G/400G high-speed multi-channel optical transmission devices The requirement of realizing more channels and higher transmission rate without changing the size of the existing optical sending device.

Description

An eight-channel high-speed optical transmission device

technical field

The invention relates to the technical field of optical communication, in particular to an eight-channel high-speed optical transmission device package.

Background technique

On the premise that 100G transmission technology is becoming more and more mature, with the rapid growth of market demand for bandwidth, people have proposed 200G or even 400G transmission concepts and requirements on the basis of existing technologies. Under the package size of the existing 100G transmission optical module, to achieve 200G/400G transmission, how to design the structure of the optical transmission device, package more transmission channels into the original small-sized optical transmission device, and realize single channel Higher rate transmission is a problem to be solved.

Contents of the invention

In view of this, the present application provides an optical transmission device capable of transmitting eight channels simultaneously under the package size of the original optical transmission device, thereby realizing 200G/400G optical transmission.

In order to solve the above technical problems, the technical solution provided by the present invention is an eight-channel high-speed optical transmission device, including a housing, and also includes:

A soft board arranged at one end outside the housing, one end of the soft board is fixed inside the housing, the other end of the soft board protrudes outside the housing, and the soft board is located inside the housing One end is provided with a pad;

The first electro-optic conversion assembly and the second electro-optic conversion assembly are arranged inside the housing; the first electro-optic conversion assembly includes a first group of four laser ceramic gaskets fixed in sequence inside the housing, a first group of Four collimating lenses, the first four-channel wavelength division multiplexer and the first focusing lens, the first group of four laser ceramic pads are respectively fixed with the first group of four laser chips; the second electro-optic conversion The assembly includes a second group of four laser ceramic gaskets, a second group of four collimating lenses, a second four-channel wavelength division multiplexer, and a second focusing lens that are sequentially fixed inside the housing. The second group The second group of four laser chips are respectively fixed on the four laser spacers;

A first light output unit and a second light output unit arranged at the other end outside the housing; the first light output unit is connected to the housing through a first fixing structure, and the first light output unit is set There is a first ceramic ferrule passing through the housing; the second light output unit is connected to the housing through a second fixing structure, and the second light output unit is provided with a A second ceramic ferrule; the first ceramic ferrule is correspondingly connected to the first focusing lens, and the second ceramic ferrule is correspondingly connected to the second focusing lens;

The pads of the soft board are electrically connected to the first group of four laser ceramic pads and the second group of four laser ceramic pads respectively; the first group of four laser ceramic pads are connected to the second group of four laser ceramic pads. A group of four laser chips are electrically connected, and the four-way light emitted by the first group of four laser chips is collimated through the first group of four collimating lenses, and then passed through the first four-channel wavelength division multiplexing multiplexer, and finally coupled into the first ceramic ferrule through the first focusing lens, and connected to the outside through the first light output unit;

The second group of four laser ceramic gaskets is electrically connected to the second group of four laser chips, and the four-way light emitted by the second group of four laser chips is transmitted through the second group of four collimating lenses. collimated, and then multiplexed through the second four-channel wavelength division multiplexer, and finally coupled into the second ceramic ferrule through the second focusing lens, and connected to the outside through the second optical output unit.

Preferably, the first electro-optic conversion component and the second electro-optic conversion component are arranged in parallel, and the first light output unit and the second light output unit are arranged in parallel.

Preferably, the eight-channel high-speed optical sending device further includes a first group of four backlight monitoring detectors and a second group of four backlight monitoring detectors, and the first group of four backlight monitoring detectors are respectively arranged on the The side positions of the first group of four laser chips in the opposite direction of light emission, the second group of four backlight monitoring detectors are respectively arranged on the side positions of the second group of four laser chips in the opposite direction of light emission, the first group of The four backlight detection detectors and the second group of four backlight detection detectors are fixed above the soft board.

Preferably, the first light output unit and the second light output unit are pigtailed optical fibers with ferrule sleeves or structural optical fibers with pluggable ferrule sleeves.

Preferably, the incident surface and the outgoing surface of the first focusing lens, the second focusing lens, the first group of four collimating lenses and the second group of four collimating lenses are all coated with an anti-reflection film.

Preferably, both the first light output unit and the second light output unit are provided with free-space optical isolators.

Preferably, the eight-channel high-speed optical transmission device further includes a thermoelectric cooler, and the thermoelectric cooler is arranged at the lower part of the first group of four laser chips and the second group of four laser chips.

Preferably, the eight-channel high-speed optical transmission device further includes a ceramic connection block, one end of the ceramic connection block located outside the housing is electrically connected to the pad of the soft board, and the ceramic connection block is located on the housing One end inside the body is respectively electrically connected to the first group of four laser ceramic pads and the second group of four laser ceramic pads.

Preferably, the ceramic connection block is soldered to the pad of the soft board, and the ceramic connection block passes through the first group of four laser ceramic pads and the second group of four laser ceramic pads respectively. Gold wire electrical connections.

Preferably, the pads of the soft board are electrically connected to the first group of four laser ceramic pads and the second group of four laser ceramic pads through gold wires; the first group of four laser ceramic pads They are respectively electrically connected to the first group of four laser chips through gold wires, and the second group of four laser ceramic pads are respectively electrically connected to the second group of four laser chips through gold wires.

Preferably, the first four-channel wavelength division multiplexer and the second four-channel wavelength division multiplexer are free-space wavelength division multiplexers or arrayed waveguide grating optical multiplexers.

Preferably, the first four-channel wavelength division multiplexer and the second four-channel wavelength division multiplexer are replaced by eight-channel wavelength division multiplexers.

Compared with the prior art, the beneficial effects of this application are described in detail as follows: The eight-channel high-speed optical sending device provided by this application includes a flexible board arranged at one end outside the casing, and also includes a first electro-optic device arranged inside the casing. The conversion assembly and the second electro-optic conversion assembly further include a first light output unit and a second light output unit arranged at the other end outside the casing. The optical transmission device uses two sets of electro-optical conversion components to perform eight-channel electro-optic conversion at the same time, and adopts a structure in which two optical output units output two channels of light at the same time, which solves the packaging problem of 200G/400G high-speed multi-channel optical transmission devices On the basis of not changing the size of the existing optical sending device, the requirement of more channels and higher transmission rate is realized.

Description of drawings

FIG. 1 is a schematic top view sectional view of an optical transmitting device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a front sectional view of an optical transmitting device according to an embodiment of the present invention;

Marked in the drawings: 1-housing, 2-soft board, 31-the first group of four laser ceramic spacers, 32-the second group of four laser ceramic spacers, 41-the first group of four laser chips, 42-the second group of four laser chips, 51-the first group of four backlight monitoring detectors, 52-the second group of four backlight monitoring detectors, 61-the first group of four collimating lenses, 62-the second group Four collimating lenses, 71-the first four-channel wavelength division multiplexer, 72-the second four-channel wavelength division multiplexer, 81-the first focusing lens, 82-the second focusing lens, 91-the first light output Unit, 92-second optical output unit, 911-first ceramic ferrule, 921-second ceramic ferrule, 912, 922-ferrule sleeve assembly, 11-first electro-optical conversion assembly, 12-second electro-optical conversion assembly .

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, the embodiment of the present invention provides an eight-channel high-speed optical transmission device, which includes a housing 1 and a flexible board 2 arranged at one end of the housing 1, and one end of the flexible board 2 is fixed on Inside the housing 1, the other end of the flexible board 2 extends out of the housing 1, and one end of the flexible board 2 inside the housing 1 is provided with a pad. The casing 1 may be a metal casing. The part of the soft board 2 extending into the housing 1 includes a gold-plated pad with a gold wire. The flexible board 2 here is not limited to the shape shown in the drawings, and the flexible board 2 using other shapes is also within the protection scope of the present application. According to the function of soft board 2, soft board 2 is divided into high-frequency signal soft board and low-frequency signal soft board, only use high-frequency signal soft board, only use low-frequency signal soft board, or use high-frequency signal soft board and low-frequency signal at the same time Flexible boards are also within the protection scope of the present application.

The eight-channel high-speed optical transmission device also includes a first electro-optical conversion assembly 11 and a second electro-optic conversion assembly 12 arranged inside the casing 1; the first electro-optic conversion assembly 11 includes a first group of four A laser ceramic gasket 31, the first group of four collimating lenses 61, the first four-channel wavelength division multiplexer 71 and the first focusing lens 81, the first group of four laser gaskets 31 are respectively fixed with the first group Four laser chips 41; the second electro-optical conversion assembly 12 includes a second group of four laser ceramic pads 32 fixed inside the housing 1, a second group of four collimating lenses 62, a second four-channel wavelength division multiplexing 72 and the second focusing lens 82, the second group of four laser chips 42 are respectively fixed on the second group of four laser pads 32.

Wherein, the first group of four collimating lenses 61 and the second group of four collimating lenses 62 may be miniature aspheric collimating lenses.

Wherein, the first four-channel wavelength division multiplexer 71 and the second four-channel wavelength division multiplexer 72 can be free space wavelength division multiplexers, or arrayed waveguide grating optical multiplexers. The first four-channel wavelength division multiplexer 71 and the second four-channel wavelength division multiplexer 72 can be replaced by an overall eight-channel wavelength division multiplexer.

Wherein, the incident surface and the outgoing surface of the first focusing lens 81 , the second focusing lens 82 , the first group of four collimating lenses 61 and the second group of four collimating lenses 62 are coated with anti-reflection film.

The eight-channel high-speed optical sending device also includes a first light output unit 91 and a second light output unit 92 arranged at the other end outside the housing 1; connection, the first light output unit 91 is provided with a first ceramic ferrule 911 passing through the housing 1; the second light output unit 92 is connected to the housing 1 through a second fixing structure 923, and the second light output unit 92 is provided with The second ceramic ferrule 921 passing through the housing 1 ; the first ceramic ferrule 911 is correspondingly connected to the first focusing lens 81 , and the second ceramic ferrule 921 is correspondingly connected to the second focusing lens 82 .

Here, the first light output unit 91 can be a pigtailed optical fiber with a ferrule sleeve. One end of the first light output unit 91 is connected to a standard LC ferrule sleeve assembly 912, and an external system is connected through the LC ferrule sleeve assembly 912. One end is fixed on the housing 1 through the first fixing structure 913; the first light output unit 91 can also be a plug-in ferrule sleeve structure optical fiber, which is welded on the metal housing 1 through the first fixing structure 913, and through the plug-in Pull-out ferrule sockets for connection to external systems.

Here, the second light output unit 92 can be a pigtailed optical fiber with a ferrule sleeve. One end of the second light output unit 92 is connected to a standard LC ferrule sleeve assembly 922, and an external system is connected through the LC ferrule sleeve assembly 922. One end is fixed on the housing 1 through the second fixing structure 923; the second light output unit 92 can also be a plug-in ferrule sleeve structure optical fiber, which is welded on the metal housing 1 through the second fixing structure 923, and the Pull-out ferrule sockets for connection to external systems.

Wherein, both the first light output unit 91 and the second light output unit 92 are provided with free-space optical isolators.

The pads of the flexible board 2 are electrically connected to the first group of four laser ceramic pads 31 and the second group of four laser ceramic pads 32 respectively; the first group of four laser ceramic pads 31 are connected to the first group of four laser chip 41 are electrically connected, and the four-way light emitted by the first group of four laser chips 41 is collimated through the first group of four collimating lenses 61, then multiplexed by the first four-channel wavelength division multiplexer 71, and finally passed through the first four-channel wavelength division multiplexer 71. A focusing lens 81 is coupled into the first ceramic ferrule 911 and connected to the outside through the first light output unit 91 .

The second group of four laser ceramic pads 32 are electrically connected to the second group of four laser chips 42, and the four-way light emitted by the second group of four laser chips 42 is collimated by the second group of four collimating lenses 62, and then Multiplexing is carried out through the second four-channel wavelength division multiplexer 72 , and finally coupled into the second ceramic ferrule 921 through the second focusing lens 82 , and connected to the outside through the second optical output unit 92 .

Wherein, the pads of the soft board 2 are electrically connected to the first group of four laser ceramic pads 31 and the second group of four laser ceramic pads 32 through gold wires; the first group of four laser ceramic pads 31 are connected to the The first group of four laser chips 41 are electrically connected through gold wires and gold-tin solder, and the second group of four laser ceramic pads 32 are electrically connected with the second group of four laser chips 42 through gold wires and gold-tin solder.

Here, the first electro-optic conversion component 11 and the second electro-optic conversion component 12 have the same structure, and the first electro-optic conversion component 11 and the second electro-optic conversion component 12 are arranged in parallel. The first light output unit 91 and the second light output unit 92 have the same structure, and the first light output unit 91 and the second light output unit 92 are arranged in parallel. The eight-channel high-speed optical transmission device adopts a structural design mode in which eight channels are arranged in parallel, which optimizes the heat dissipation performance of the optical transmission device.

The eight-channel high-speed optical sending device also includes a first group of four backlight monitoring detectors 51 and a second group of four backlight monitoring detectors 52, and the first group of four backlight monitoring detectors 51 are respectively arranged in the first group of four The side position of the light emitting direction of the first laser chip 41, the second group of four backlight monitoring detectors 52 are respectively arranged on the side positions of the second group of four laser chips 42 in the opposite direction of the light emitting direction, and the first group of four backlight detection detectors 51 And the second group of four backlight detection detectors 52 are fixed above the soft board 2 for optical power monitoring.

The eight-channel high-speed optical transmission device also includes a thermoelectric cooler 10 , and the thermoelectric cooler 10 is arranged at the lower part of the first group of four laser chips 41 and the second group of four laser chips 42 .

Among them, a total of eight laser chips including the first group of four laser chips 41 and the second group of four laser chips 42 can be distributed feedback lasers for 25G wavelength division multiplexing, and 200G transmission can be realized through eight laser chips. The thermoelectric cooler 10 performs precise temperature control, thereby controlling the central wavelength. A total of eight laser chips including the first group of four laser chips 41 and the second group of four laser chips 42 can also use different modulation methods to achieve a transmission rate of 56G per channel, thereby achieving 400G transmission.

The embodiment of the invention provides another eight-channel high-speed optical transmission device. On the basis of the above embodiments, an improvement is made for the flexible board 2. Due to the material of the flexible board 2, it is impossible to achieve a close fit with the housing 1. , the airtightness of the optical sending device is not good enough, so a ceramic connection block is added in the eight-channel high-speed optical sending device, and the end of the ceramic connection block located outside the housing 1 is electrically connected to the pad of the soft board 2 One end of the ceramic connection block inside the housing 1 is electrically connected to the first group of four laser ceramic pads 31 and the second group of four laser ceramic pads 32 respectively. The ceramic connection block can be closely attached to the housing 1, which ensures the airtightness of the eight-channel high-speed optical sending device.

Wherein, the ceramic connection block is connected to the pad of the soft board 2 by soldering, and the ceramic connection block is electrically connected to the first group of four laser ceramic pads 31 and the second group of four laser ceramic pads 32 by gold wires.

The above are only preferred implementations of the present invention, and it should be noted that the above preferred implementations should not be regarded as limiting the present invention, and the scope of protection of the present invention should be based on the scope defined in the claims. For those skilled in the art, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of eight channel high rate optical sending devices, including shell, which is characterized in that further include：

Soft board in described hull outside one end is set, and one end of the soft board is fixed on the enclosure interior, the soft board The other end reaches hull outside, and one end that the soft board is located at the enclosure interior is provided with pad；

The first electro-optic conversion component and the second electro-optic conversion component in the enclosure interior is set；The first electro-optic conversion group Part includes first group of four laser ceramic gasket for being sequentially fixed at the enclosure interior, first group of four collimation lens, One four-way wavelength division multiplexer and the first condenser lens are respectively fixed with first on described first group of four laser ceramic gasket Four chip of laser of group；The second electro-optic conversion component includes being sequentially fixed at second group four of the enclosure interior to swash Light device ceramic gasket, second group of four collimation lens, the second four-way wavelength division multiplexer and the second condenser lens, described second group Second group of four chip of laser is respectively fixed on four laser gaskets；

The first light output unit and the second light output unit in the hull outside other end is set；The first light output list Member is connect by first fixed structure part with the shell, and the first light output unit is provided through the first of the shell Ceramic insertion core；The second light output unit is connect by the second fixed structure piece with the shell, the second light output list Member is provided through the second ceramic insertion core of the shell；First ceramic insertion core is corresponding with first condenser lens to be connected It connects, second ceramic insertion core is correspondingly connected with second condenser lens；

The pad of the soft board is made pottery with described first group of four laser ceramic gasket and second group of four laser respectively Porcelain gasket is electrically connected；Described first group of four laser ceramic gasket are electrically connected with described first group of four chip of laser, institute It states the four road light that first group of four chip of laser is sent out to be collimated by described first group of four collimation lens, then passes through institute It states the first four-way wavelength division multiplexer to be multiplexed, the first ceramic insertion core is coupled into eventually by first condenser lens, lead to Cross the first light output unit and external connection；

Described second group of four laser ceramic gasket are electrically connected with described second group of four chip of laser, described second group four The four road light that a chip of laser is sent out are collimated by described second group of four collimation lens, then pass through second four-way Road wavelength division multiplexer is multiplexed, and is coupled into the second ceramic insertion core eventually by second condenser lens, is passed through described second Light output unit and external connection.

2. eight channels high rate optical sending device according to claim 1, which is characterized in that the first electro-optic conversion group Part and the setting of the second electro-optic conversion component parallel arranged, the first light output unit and the second light output unit parallel arranged are set It sets.

3. eight channels high rate optical sending device according to claim 1, which is characterized in that further include first group of four back of the body Light detection detector and second group of four monitoring back light detector, correspondence is set described first group of four monitoring back light detector respectively Set the lateral location in described first group four chip of laser light extraction negative directions, described second group of four monitoring back light detector It is correspondingly arranged at the lateral location of described second group four chip of laser light extraction negative directions, described first group of four backlight respectively Detection detector and second group of four backlights detection detector are fixed on above the soft board.

4. eight channels high rate optical sending device according to claim 1, which is characterized in that the first light output unit It is the tail optical fiber structured optical fiber covered with lock pin or with plug-in lock pin nested structure optical fiber with the second light output unit.

5. eight channels high rate optical sending device according to claim 1, which is characterized in that the first four-way wavelength-division Multiplexer and the second four-way wavelength division multiplexer replace with eight channel wavelength division multiplexers.

6. eight channels high rate optical sending device according to claim 1, which is characterized in that the first four-way wavelength-division Multiplexer and the second four-way wavelength division multiplexer use free-space wavelength division multiplexing device or array waveguide grating light multiplexing Device.

7. eight channels high rate optical sending device according to claim 1, which is characterized in that further include thermoelectric cooler, The thermoelectric cooler is arranged in the lower part of described first group of four chip of laser and second group of four chip of laser.

8. eight channels high rate optical sending device according to claim 1, which is characterized in that further include ceramic joining block, One end that the ceramic joining block is located at the hull outside is electrically connected with the pad of the soft board, and the ceramic joining block is located at One end of the enclosure interior respectively with described first group of four laser ceramic gasket and second group of four laser ceramic blanket Piece is electrically connected.

9. eight channels high rate optical sending device according to claim 8, which is characterized in that the ceramic joining block and institute State the pad solder connection of soft board, the ceramic joining block respectively with described first group of four laser ceramic gasket and described the Two groups of four laser ceramic gaskets are electrically connected by gold thread.

10. eight channels high rate optical sending device according to claim 1, which is characterized in that the pad of the soft board point It is not electrically connected by gold thread with described first group of four laser ceramic gasket and second group of four laser ceramic gasket；It is described First group of four laser ceramic gasket is electrically connected with described first group of four chip of laser by gold thread respectively, and described second Four laser ceramic gaskets of group are electrically connected with described second group of four chip of laser by gold thread respectively.