CN214542916U - Coaxial packaging laser device - Google Patents
Coaxial packaging laser device Download PDFInfo
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- CN214542916U CN214542916U CN202120334297.0U CN202120334297U CN214542916U CN 214542916 U CN214542916 U CN 214542916U CN 202120334297 U CN202120334297 U CN 202120334297U CN 214542916 U CN214542916 U CN 214542916U
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Abstract
The embodiment of the utility model discloses coaxial encapsulation laser device for solve the not good technical problem of radiating effect of current coaxial encapsulation laser device. The embodiment of the utility model provides a tube socket, laser chip, reflection prism, semiconductor refrigerator and thermistor; the laser diode is characterized in that the tube seat is provided with a plurality of mounting holes, pins are mounted in the mounting holes, the semiconductor refrigerator is mounted on the tube seat, the semiconductor refrigerator is provided with a heat sinking block, and the laser chip, the reflecting prism and the thermistor are all arranged on the heat sinking block; the pins are respectively and electrically connected with the laser chip, the semiconductor refrigerator and the thermistor.
Description
Technical Field
The utility model relates to a communication laser changes technical field, especially relates to a coaxial packaging laser device.
Background
With the development of the optical communication industry, the demand of lasers with higher speed and longer transmission distance is continuously increased, and high power means large power consumption, and waste heat generated in the working process of the lasers is increased, so that the heat dissipation problem of the coaxial package of the high-power lasers is emphasized by more and more experts.
Although a refrigeration-type coaxial package laser with a temperature control system is already on the market at present, the laser of this type has a relatively high cost, a relatively complex structure and a poor heat dissipation effect, specifically, as shown in fig. 5, a laser chip and an aluminum nitride substrate of the current refrigeration-type coaxial package laser need to be erected on a refrigerator by arranging a transition substrate, due to the existence of the transition substrate, the laser chip and the aluminum nitride substrate cannot be directly tiled on the refrigerator, heat of the laser chip can enter the refrigerator only through the aluminum nitride substrate and the transition substrate, and the heat dissipation efficiency of the whole laser is seriously affected by the existing design.
Therefore, in order to solve the conventional technical problems, it is an important subject of research by those skilled in the art to find a laser device with coaxial package.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model discloses coaxial encapsulation laser device for solve the not good technical problem of radiating effect of current coaxial encapsulation laser device.
The embodiment of the utility model provides a coaxial packaging laser device, which comprises a tube seat, a laser chip, a reflecting prism, a semiconductor refrigerator and a thermistor;
the laser diode is characterized in that the tube seat is provided with a plurality of mounting holes, pins are mounted in the mounting holes, the semiconductor refrigerator is mounted on the tube seat, the semiconductor refrigerator is provided with a heat sinking block, and the laser chip, the reflecting prism and the thermistor are all arranged on the heat sinking block;
the pins are respectively and electrically connected with the laser chip, the semiconductor refrigerator and the thermistor.
Optionally, the system further comprises a backlight detection chip;
the backlight detection chip is arranged on the heat sinking block;
the backlight detection chip is electrically connected with the pins.
Optionally, further comprising a conductive wire;
the pins are electrically connected with the laser chip, the semiconductor refrigerator, the thermistor and the backlight detection chip through the conducting wires respectively.
Optionally, the conductive line is a gold line.
Optionally, the backlight detection chip is disposed on a reverse path of the laser beam emitted from the laser chip, and the reflection prism is disposed on a same-direction path of the laser beam emitted from the laser chip.
Optionally, the device further comprises a hollow pipe cap, wherein the pipe cap is fixedly connected with the pipe seat and forms a cavity with the pipe seat;
sealing glass is arranged in the pipe cap;
the tube cap is internally provided with a lens, the lens is positioned on one side of the sealing glass far away from the tube seat, and one end of the lens far away from the sealing glass protrudes out of the tube cap.
Optionally, one end of the lens, which is far away from the sealing glass, is provided with a first fixing ring, and the first fixing ring is mounted on the tube cap.
Optionally, further comprising an outer housing, a single ring adapter, and a second retaining ring;
the shell body is sleeved on the periphery of the pipe cap, the single-ring adapter is fixedly connected with the second fixing ring, and the single-ring adapter is connected with one end, far away from the pipe seat, of the shell body through the second fixing ring.
Optionally, a heat dissipation block is further mounted on the outer shell;
the radiating block is attached to the outer wall of the outer shell.
Optionally, an aluminum nitride substrate is further disposed on the tube seat, the aluminum nitride substrate is connected to the two pins, and the aluminum nitride substrate is connected to the heat sink block through the conductive wire.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the heat sink block in the embodiment is directly arranged on the semiconductor refrigerator, the laser chip and the thermistor are directly paved on the surface of the heat sink block, heat emitted by the laser chip can directly reach the semiconductor refrigerator through the heat sink block, the semiconductor refrigerator can more effectively convert heat energy quickly, the semiconductor refrigerator absorbs the heat and transmits the heat to the pipe seat, and the heat is dissipated out of the laser device from the bottom of the pipe seat. Through foretell design, can effectively improve coaxial encapsulation laser device's radiating efficiency, make coaxial encapsulation laser device can normally stabilize the work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a coaxial package laser device provided in the present invention;
fig. 2 is an exploded view of a coaxial packaged laser device according to the present invention;
fig. 3 is a schematic structural diagram of a tube socket and related electronic components in a coaxial package laser device according to the present invention;
fig. 4 is a schematic structural diagram of a heat sink block in a coaxial package laser device according to the present invention;
fig. 5 is a schematic diagram of an internal structure of a refrigeration-type coaxial package laser in the background art;
illustration of the drawings: a tube holder 1; a semiconductor refrigerator 2; a heat sink block 3; a pad 301; a first gold layer region 302; a second gold layer region 303; a third gold layer region 304; fourth au layer region 305; fifth layer region 306; a laser chip 4; a reflection prism 5; a thermistor 6; a backlight detection chip 7; a pin 8; an aluminum nitride substrate 9; a pipe cap 10; a sealing glass 11; a first fixing ring 12; a lens 13; an outer housing 14; a second fixing ring 15; a single loop adapter 16; a heat dissipation block 17;
Detailed Description
The embodiment of the utility model discloses coaxial encapsulation laser device for solve the not good technical problem of radiating effect of current coaxial encapsulation laser device.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, a coaxial package laser device provided in the present embodiment includes:
the laser diode comprises a tube seat 1, a laser chip 4, a reflecting prism 5, a semiconductor refrigerator 2 and a thermistor 6;
the laser diode is characterized in that a plurality of mounting holes are formed in the tube seat 1, pins 8 are mounted in the mounting holes, the semiconductor refrigerator 2 is mounted on the tube seat 1, a heat sinking block 3 is arranged on the semiconductor refrigerator 2, and the laser chip 4, the reflecting prism 5 and the thermistor 6 are all arranged on the heat sinking block 3;
it should be noted that the laser chip 4 and the heat sinking block 3 are fixed by eutectic welding;
the plurality of pins 8 are electrically connected to the laser chip 4, the semiconductor refrigerator 2, and the thermistor 6, respectively.
It should be noted that, the laser chip 4, the thermistor 6, and the reflection prism 5 are all laid on the heat sink block 3, and the thermistor 6 is arranged close to the laser chip 4, so that the thermistor 6 can more accurately detect the temperature of the laser chip 4 during operation, and further, the accurate control of the operating temperature of the laser chip 4 is realized.
The working principle of controlling the temperature of the laser chip 4 in this embodiment is as follows:
the temperature change of the laser chip 4 causes the change of the resistance value of the thermistor 6, the change is transmitted to the control circuit of the semiconductor refrigerator 2 through the corresponding circuit structure, and the control circuit controls the working temperature of the laser chip 4 by adjusting the input current of the semiconductor refrigerator 2.
The heat sink block 3 in this embodiment is directly disposed on the semiconductor refrigerator 2, the laser chip 4 and the thermistor 6 are directly laid on the surface of the heat sink block 3, the heat emitted from the laser chip 4 can directly reach the semiconductor refrigerator 2 through the heat sink block 3, the semiconductor refrigerator 2 can convert heat energy rapidly, the semiconductor refrigerator 2 absorbs the heat and transmits the heat to the tube seat 1, and the heat is emitted from the bottom of the tube seat 1 to the outside of the laser device. Through foretell design, can effectively improve coaxial encapsulation laser device's radiating efficiency, make coaxial encapsulation laser device can normally stabilize the work.
Further, a backlight detection chip 7 is also included;
the backlight detection chip 7 is arranged on the heat sinking block 3, and the backlight detection chip 7 is arranged on a reverse path of a laser beam emitted by the laser chip 4;
the backlight detection chip 7 is electrically connected with the pin 8.
In this embodiment, the backlight detection chip 7 is mainly configured to receive light emitted from the back side of the laser chip 4, convert the light signal into an electrical signal, obtain a backlight current of the laser chip 4, and feed back the electrical signal to a corresponding control circuit. If the performance of the laser chip 4 is weakened and the output light power is low, the backlight current is weakened, the control circuit increases the driving current to increase the output power of the laser chip 4, and conversely, if the output power of the laser is increased due to environmental changes, the backlight current is increased and is fed back to the control circuit to reduce the driving current and the output power of light, so that the light output by the laser chip 4 is ensured to have stable light power, and the performance of the laser chip 4 can be judged according to the backlight current, so that the user experience is better.
Further, a conductive line is also included;
the pins 8 are electrically connected with the laser chip 4, the semiconductor refrigerator 2, the thermistor 6 and the backlight detection chip 7 through the conductive wires, respectively.
Specifically, the surface of the heat sink block 3 in this embodiment is provided with a pad 301, a first au layer area 302, a second au layer area 303, a third au layer area 304, a fourth au layer area 305, and a fifth au layer area 306, and the five au layer areas are arranged around the pad 301;
the laser chip 4 is arranged on the bonding pad 301, the first gold layer area 302 is connected with the positive electrode of the laser chip 4 through a conducting wire, the second gold layer area 303 is connected with the negative electrode of the laser chip 4 through a conducting wire, and the first gold layer area 302 and the second gold layer area 303 are respectively connected with the pins 8 through conducting wires; the detection chip 7 is surveyed in a poor light sets up in third gold layer region 304, and third gold layer region 304 is connected with pin 8 through the conductor wire, thermistor 6 sets up in fourth gold layer region 305, fourth gold layer region 305 is connected with pin 8 through the conductor wire, fifth layer region 306 is thermistor 6's transition interval, and fifth layer region 306 is connected with pin 8 through the conductor wire.
The electronic components are mounted by dividing the heat sink block 3 into a plurality of areas, which mainly aims to solve the problem that the impedance of the whole link is unequal due to the overlong conducting wire, so that the radio frequency performance of the whole laser device is cracked.
Alternatively, the conductive wires in this embodiment may be gold wires.
Further, the reflecting prism 5 is disposed on the same path of the laser beam emitted from the laser chip 4.
In addition, the above-described design ensures that the laser light emitted from the laser chip 4 can be reflected by the reflecting prism 5.
Further, the device also comprises a hollow pipe cap 10, wherein the pipe cap 10 is fixedly connected with the pipe seat 1 and forms a cavity with the pipe seat 1;
the electronic elements on the tube seat 1 are all positioned in the cavity;
a sealing glass 11 is installed in the pipe cap 10, and the sealing glass 11 is used for sealing the pipe cap 10 to ensure that a light path inside the pipe cap 10 is complete;
a lens 13 is further arranged in the tube cap 10, the lens 13 is positioned on one side of the sealing glass 11 far away from the tube seat 1, and one end of the lens 13 far away from the sealing glass 11 protrudes out of the tube cap 10.
It should be noted that the laser beam emitted by the laser chip 4 is reflected by the reflecting prism 5 and then perpendicularly enters the center of the tube cap 10, and specifically, the reflected laser beam can directly enter the center of the lens 13.
Further, one end of the lens 13, which is far away from the sealing glass 11, is provided with a first fixing ring 12, and the first fixing ring 12 is installed on the cap 10.
Note that the first fixing ring 12 is used to fix the lens 13.
Further, an outer housing 14, a single ring adapter 16 and a second fixing ring 15;
the outer shell 14 is sleeved on the periphery of the pipe cap 10, the single-ring adapter 16 is fixedly connected with the second fixing ring 15, and the single-ring adapter 16 is connected with one end, far away from the pipe seat 1, of the outer shell 14 through the second fixing ring 15.
The outer housing 14, the cap 10, the stem 1, the single ring adapter 16, and the lens 13 are coaxially attached.
Further, a heat dissipation block 17 is further mounted on the outer shell 14;
the heat dissipation block 17 is attached to the outer wall of the outer housing 14.
It should be noted that, by the above design, the heat dissipation efficiency of the coaxial package laser device in the present embodiment can be further enhanced.
Further, an aluminum nitride substrate 9 is further disposed on the tube seat 1, the aluminum nitride substrate 9 is connected to the two pins 8, and the aluminum nitride substrate 9 is connected to the heat sink block 3 through the conductive wire.
The aluminum nitride substrate 9 is fixed to the two pins 8 in the form of a gold-tin-added sheet.
The coaxial package laser device in the embodiment has the following advantages:
1. the tube seat 1 is directly connected with the signal transmission substrate, replaces an imported high-frequency combination technology, and has the advantage of low cost; the tube seat 1 does not need to additionally consider the processing process problem of the substrate in the vertical direction, and the die opening difficulty is small;
2. each electronic element on the tube seat 1 adopts a lying structure, so that the structure of the laser device is more compact, and meanwhile, a main light path and a backlight detection light path are more stable, and the optical signal transmission effect is excellent;
3. the laser chip 4, the backlight detection chip 7 and the thermistor 6 are flatly attached to the heat sinking block 3, the flow of the die bonding and eutectic process is simplified, the operation difficulty is small, and the accuracy of chip mounting is high;
4. the laser chip 4 with the flat-lying structure is directly and flatly attached to the hot surface of the semiconductor refrigerator 2 through the heat sink block 3 on the back, so that the semiconductor refrigerator 2 can more effectively and quickly convert heat energy, and the heat energy is transmitted to the bottom of the tube seat 1 through the cold surface of the semiconductor refrigerator 2 to be dissipated. Compared with the current three-dimensional structure, the contact area of the heat sink block 3 and the semiconductor refrigerator 2 is twice of that of the three-dimensional structure, the thermoelectric refrigeration effect is fully utilized, and the reliability is high;
5. the thermistor 6 with a flat-lying structure and the laser are arranged on the same heat sinking block 3, the distance is short, the thermal inductance performance is better, and the control precision of the working wavelength is further improved;
6. the arrangement of each module interval on the heat sinking block 3 is reasonable, the distance of gold wires required to be welded is short, the link impedance is low, and the electric signal transmission performance is stable.
It is right above the utility model provides a coaxial packaging laser device has carried out detailed introduction, to the general technical personnel in this field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.
Claims (10)
1. A coaxial packaging laser device is characterized by comprising a tube seat, a laser chip, a reflecting prism, a semiconductor refrigerator and a thermistor;
the laser diode is characterized in that the tube seat is provided with a plurality of mounting holes, pins are mounted in the mounting holes, the semiconductor refrigerator is mounted on the tube seat, the semiconductor refrigerator is provided with a heat sinking block, and the laser chip, the reflecting prism and the thermistor are all arranged on the heat sinking block;
the pins are respectively and electrically connected with the laser chip, the semiconductor refrigerator and the thermistor.
2. The laser device of claim 1, further comprising a backlight detection chip;
the backlight detection chip is arranged on the heat sinking block;
the backlight detection chip is electrically connected with the pins.
3. The coaxial package laser device of claim 2, further comprising a conductive wire;
the pins are electrically connected with the laser chip, the semiconductor refrigerator, the thermistor and the backlight detection chip through the conducting wires respectively.
4. The laser device of claim 3, wherein the conductive wire is a gold wire.
5. The laser device of claim 2, wherein the backlight detection chip is disposed on a backward path of the laser beam emitted from the laser chip, and the reflection prism is disposed on a same-direction path of the laser beam emitted from the laser chip.
6. The laser device of claim 1, further comprising a hollow cap fixedly attached to the stem and forming a cavity with the stem;
sealing glass is arranged in the pipe cap;
the tube cap is internally provided with a lens, the lens is positioned on one side of the sealing glass far away from the tube seat, and one end of the lens far away from the sealing glass protrudes out of the tube cap.
7. The laser device as claimed in claim 6, wherein the end of the lens away from the sealing glass is provided with a first fixing ring, and the first fixing ring is mounted on the cap.
8. The coaxial package laser device of claim 6, further comprising an outer housing, a single ring adapter, and a second retaining ring;
the shell body is sleeved on the periphery of the pipe cap, the single-ring adapter is fixedly connected with the second fixing ring, and the single-ring adapter is connected with one end, far away from the pipe seat, of the shell body through the second fixing ring.
9. The laser device of claim 8, wherein a heat sink is further mounted on the outer housing;
the radiating block is attached to the outer wall of the outer shell.
10. The laser device as claimed in claim 3, wherein an aluminum nitride substrate is further disposed on the stem, the aluminum nitride substrate is connected to the two pins, and the aluminum nitride substrate is connected to the heat sink block through the conductive wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120334297.0U CN214542916U (en) | 2021-02-05 | 2021-02-05 | Coaxial packaging laser device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120334297.0U CN214542916U (en) | 2021-02-05 | 2021-02-05 | Coaxial packaging laser device |
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| Publication Number | Publication Date |
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| CN214542916U true CN214542916U (en) | 2021-10-29 |
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| CN202120334297.0U Active CN214542916U (en) | 2021-02-05 | 2021-02-05 | Coaxial packaging laser device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803235A (en) * | 2021-02-05 | 2021-05-14 | 广东瑞谷光网通信股份有限公司 | Coaxial packaging laser device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803235A (en) * | 2021-02-05 | 2021-05-14 | 广东瑞谷光网通信股份有限公司 | Coaxial packaging laser device |
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