CN111948766A

CN111948766A - TOSA and optical module of multiplexing pin

Info

Publication number: CN111948766A
Application number: CN202010820303.3A
Authority: CN
Inventors: 易利
Original assignee: Solce Optoelectronics Co ltd
Current assignee: Solce Optoelectronics Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-11-17
Anticipated expiration: 2040-08-14
Also published as: CN111948766B

Abstract

The invention relates to a Transmitter Optical Subassembly (TOSA) capable of multiplexing pins and an optical module, which comprise a pin A, a pin B and a pin C, wherein an RTH (remote terminal) functional end is respectively connected with any two pins of the pin A, the pin B and the pin C through a wire, an MPD (metal-clad memory) functional end is respectively connected with any two pins of the pin A, the pin B and the pin C through a wire, a TEC (thermoelectric cooler) functional end is respectively connected with any two pins of the pin A, the pin B and the pin C through wires, and the pin A, the pin B and the pin C are respectively connected with any two functional ends of the RTH functional end, the MPD functional end and the TEC functional end through wires. The invention can reduce the using number of the pins of the TOSA by repeatedly connecting the functional end to the pins, realizes the multiplexing of the pins, reduces the using number of the pins under the condition of not changing the function of the TOSA, further avoids the problem of air leakage of the optical module and improves the reliability of the optical module.

Description

TOSA and optical module of multiplexing pin

Technical Field

The invention relates to the technical field of optical communication, in particular to a Transmitter Optical Subassembly (TOSA) capable of multiplexing pins and an optical module.

Background

The TOSA is an essential component in an Optical module, called a Transmitter Optical Subassembly (Transmitter Optical Subassembly), for converting an electrical signal into an Optical signal and emitting a laser signal. Pins of the TOSA are classified into two types, one is a pin for providing duration use, and the other is a pin for providing discontinuous use. For example, when a 7-PIN TOSA realizes the basic functions of TEC +, TEC-, MPD, RTH, LD, EA and GND, one PIN corresponds to one function, and the PINs of the TOSA are just used up. However, if the number of pins of the TOSA is increased, the problem of air leakage of the optical module is more likely to occur, and the reliability of the TOSA is reduced.

Basic functional end explanation: the RTH function end is used for feeding back a temperature signal of the thermistor, the MPD function end is used for feeding back a working state signal of the LD laser, the TEC + and TEC-function ends are used for carrying out temperature refrigeration and heating regulation and control on the LD laser, the LD function end is connected into the LD laser, the EA function end is connected with an incident light current signal, and the GND function end is a grounding end. It can be seen that, where LD, EA and GND are functions that need to be used continuously, TEC +, TEC-, MPD and RTH may be functions that are used intermittently.

Disclosure of Invention

The invention aims to solve the problem of avoiding air leakage of an optical module as much as possible, provides a TOSA capable of multiplexing pins and the optical module, and improves the reliability of a device.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

on one hand, the invention provides a TOSA capable of multiplexing pins, which comprises a pin A, a pin B and a pin C, and is connected with an RTH function end, an MPD function end and a TEC function end, wherein the RTH function end is respectively connected with any two pins of the pin A, the pin B and the pin C through a conducting wire, the MPD function end is respectively connected with any two pins of the pin A, the pin B and the pin C through a conducting wire, the TEC function end is respectively connected with any two pins of the pin A, the pin B and the pin C through a conducting wire, and the pin A, the pin B and the pin C are respectively connected with only any two functional ends of the RTH function end, the MPD function end and the TEC function end through a conducting wire.

As is well known, the TEC functional end has two functions of cooling and heating, and therefore two pins are required to be connected respectively and used for cooling and heating, but the RTH functional end, the MPD functional end, and the TEC functional end are functional ends that can be used intermittently and are not always in a working state, so that the number of TOSA pins can be reduced.

Furthermore, the TEC function end comprises a TEC refrigeration function end and a TEC heating function end; the TEC refrigeration function end is respectively connected with any one of a pin A, a pin B and a pin C through a conducting wire, the TEC heating function end is respectively connected with any one of the pin A, the pin B and the pin C through a conducting wire, and the pin A, the pin B and the pin C are respectively connected with any two of the RTH function end, the MPD function end, the TEC refrigeration function end and the TEC heating function end through conducting wires.

Because TEC function terminal has two functions of refrigeration and heating, consequently need two pins to be connected respectively, be used for refrigerating respectively and heating, but the function terminal that totally has four discontinuous time uses, multiplexes four function terminals respectively on TOSA's three pin, for prior art under the condition that does not influence four function terminal uses, has reduced TOSA's pin use quantity.

Furthermore, the circuit also comprises a pin D, and the pin D is connected with the LD functional end through a conducting wire.

In fact, TOSA in this scheme has not only included PIN a, PIN B, PIN C, PIN D, TOSA like 7PIN then still includes PIN E, PIN F, PIN G, wherein be connected PIN D and LD function end, PIN E is connected with EA function end, PIN F is connected with GND function end, because LD, EA, GND is the function that duration used, carry out function multiplex back to PIN a, PIN B, PIN C, then remaining PIN G is idle, on the one hand for prior art under the condition that does not change the function, the use amount of PIN has been reduced, can further avoid the problem of optical module gas leakage, other function ends can be connected to idle PIN G of on the other hand, under the condition that increases function for prior art, the use quantity of PIN does not increase.

On the other hand, the invention also provides an optical module, which comprises the TOSA capable of multiplexing the pins according to any embodiment of the invention.

Compared with the prior art, the invention has the beneficial effects that:

the invention can reduce the using number of the pins of the TOSA by repeatedly connecting the functional end to the pins, realize the multiplexing of the pins, reduce the using number of the pins under the condition of not changing the function of the TOSA, further avoid the problem of air leakage of the optical module and improve the reliability of the optical module; on the other hand, the rest pins can be connected with other functional ends, and under the condition of increasing the function, the using number of the pins is not increased, so that the aim of multiple functions of the TOSA is fulfilled.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a TOSA connection scheme for a reusable pin according to the present invention;

FIG. 2 is a schematic cross-sectional view of a prior art TOSA attachment hole;

FIG. 3 is a schematic diagram illustrating a detailed connection of the TOSA with reusable pins according to the present invention;

fig. 4 is a waveform diagram of the operating state of the functional terminal in embodiment 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "a", "B", and the like are used for distinguishing between descriptions and not to indicate or imply relative importance or any actual relationship or order between such entities or operations.

Example 1:

the invention is realized by the following technical scheme that as shown in fig. 1, the TOSA capable of multiplexing the pins comprises a pin A, a pin B and a pin C, and is connected with an RTH function end, an MPD function end and a TEC function end, wherein the TEC function end comprises a TEC refrigeration function end and a TEC heating function end.

As shown in fig. 3, the RTH function terminal is connected to any two of the pin a, the pin B, and the pin C through a wire, the MPD function terminal is connected to any two of the pin a, the pin B, and the pin C through a wire, the TEC refrigeration function terminal is connected to any one of the pin a, the pin B, and the pin C through a wire, the TEC heating function terminal is connected to any one of the pin a, the pin B, and the pin C through a wire, and the pin a, the pin B, and the pin C are connected to only any two of the RTH function terminal, the MPD function terminal, the TEC refrigeration function terminal, and the TEC heating function terminal through a wire.

TOSA need be connected with RTH function side, MPD function end, TEC refrigeration function end, TEC respectively, and four pins one-to-one are required to be connected in traditional mode promptly, but in fact not all function ends all need be in operating condition all the time, consequently can reduce the quantity of pin, make function end reconnection on the pin, connect other function ends with the pin that exceeds, realize the multiplexing of pin, also reach the multi-purpose of TOSA function simultaneously.

As shown in fig. 2, the TOSA has a pin a, a pin B, a pin C, and a pin D, and the conventional method is to connect the RTH function end, the MPD function end, the TEC refrigeration function end, and the TEC heating function end to the pin a, the pin B, the pin C, and the pin D in a one-to-one correspondence manner, for example, the RTH function end is connected to the pin a, the MPD function end is connected to the pin B, the TEC refrigeration function end is connected to the pin C, and the TEC heating function end is connected to the pin D, but not limited to this connection sequence, and the function ends may be connected to the pins one-to-one.

Because the RTH function terminal, the MPD function terminal, the TEC refrigeration function terminal and the TEC heating function terminal are not all in working states at the same time, one pin can be connected with the two function terminals at the same time, when one of the function terminals is not in the working state, the other connected function terminal enters into working, and therefore the pin usage can be reduced under the condition that the number of the function terminals is the same, or the function terminal usage is increased under the condition that the number of the pins is the same.

For example, as shown in fig. 3, pin a is connected to the RTH function terminal and the MPD function terminal, pin B is connected to the RTH function terminal and the TEC refrigeration function terminal, pin C is connected to the TEC heating function terminal and the MPD function terminal, and pin D is connected to the LD laser. Note that each pin only needs to be connected to any two functional terminals, and one functional terminal is connected to any two or one pin, which is not limited to the connection manner of this embodiment.

After connection, assuming that pin a starts the working state of the RTH functional end, then pausing the working state of the MPD functional end, if the MPD functional end needs to be used at this time, pin C starts the working state of the MPD functional end, because the MPD is used for regularly feeding back the working voltage signal of the LD, the working state of the MPD functional end does not need to be started all the time, and after the MPD feeds back the working voltage signal of the LD, pin C can pause the working state of the MPD functional end, and then pin B can be controlled to start the working state of the TEC refrigeration functional end or pin C can be controlled to start the working state of the TEC heating functional end, and at this time, no matter whether pin B starts the working state of the TEC refrigeration functional end or pin C starts the working state of the TEC heating functional end, the working of the RTH functional end cannot be affected.

It should be noted here that the TEC function terminal includes two functions of cooling and heating, and cools or heats the operating environment of the LD laser, and when in use, only the LD laser needs to be cooled or heated, but not both. Therefore, it can also be understood that, when the TEC refrigeration function terminal needs to operate, the pin B starts the operating state of the TEC refrigeration function terminal and suspends the operating state of the RTH function terminal, the pin a starts the operating state of the RTH function terminal and suspends the operating state of the MPD function terminal, and the pin C starts the operating state of the MPD function terminal and suspends the operating state of the TEC heating function terminal.

In some practical cases, the RTH functional end and the MPD functional end are configured to detect and feed back a working state of the LD laser, and the TEC functional end is configured to regulate and control the LD laser according to information detected and fed back by the RTH functional end and/or the MPD functional end, so that the RTH functional end and the MPD functional end do not need to be in the working state all the time, and neither the RTH functional end nor the MPD functional end need to be in the working state at the same time. Therefore, as shown in fig. 4, when the RTH functional end is in an operating state, the MPD functional end and the TEC functional end are not in an operating state; when the MPD functional end is in a working state, the RTH functional end and the TEC functional end are not in the working state; and when the TEC function terminal is in a working state, the RTH function terminal and the MPD function terminal are not in a working state. The scheme of connecting one pin with two functional ends is combined, so that the purposes of reducing the use amount of the pin and increasing the use amount of the functional ends are also achieved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a TOSA of multiplexing pin, includes pin A, pin B, pin C, and with RTH functional terminal, MPD functional terminal, TEC + functional terminal, TEC-functional terminal connection, its characterized in that:

the RTH function end is respectively connected with any two of the pin A, the pin B and the pin C through a conducting wire, the MPD function end is respectively connected with any two of the pin A, the pin B and the pin C through a conducting wire, the TEC + function end and the TEC-function end are respectively connected with any two of the pin A, the pin B and the pin C through conducting wires, the pin A, the pin B and the pin C are respectively and only connected with the RTH function end, the MPD function end and the TEC + function end, and any two of the TEC-function ends are connected through a conducting wire.

2. The TOSA capable of multiplexing pins according to claim 1, wherein: the TEC function end comprises a TEC refrigeration function end and a TEC heating function end;

the TEC refrigeration function end is respectively connected with any one of a pin A, a pin B and a pin C through a conducting wire, the TEC heating function end is respectively connected with any one of the pin A, the pin B and the pin C through a conducting wire, and the pin A, the pin B and the pin C are respectively connected with any two of the RTH function end, the MPD function end, the TEC refrigeration function end and the TEC heating function end through conducting wires.

3. The TOSA capable of multiplexing pins according to claim 1 or 2, wherein: the LED lamp also comprises a pin D, wherein the pin D is connected with the LD functional end through a wire.

4. An optical module, characterized in that: a TOSA including the reusable pin of any one of claims 1-3.