Improved structure of laser emitting diode with semiconductor refrigerator

Abstract

The utility model relates to the field of laser emitting diodes, in particular to an improved structure of a laser emitting diode with a semiconductor refrigerator. Comprising an adjusting device, the adjusting device comprises a fixing ring, the fixing ring is fixedly connected with an optical fiber, one side, close to a plastic sheath, of the fixing ring is fixedly connected with a telescopic rod, one end, away from the fixing ring, of the telescopic rod is fixedly connected with a moving ring, and two ends of an arc surface of the moving ring are fixedly connected with fixing rods. The arc surface of the fixing rod is slidably connected with an adjusting block. According to the laser emitting diode improved structure with the semiconductor refrigerator provided by the utility model, when the optical fiber is connected with the plastic sheath, the connecting part between the optical fiber and the plastic sheath can be protected by using the adjusting device, and the connecting part between the optical fiber and the plastic sheath can be protected; and the phenomenon that the optical fiber is bent and the service life of the optical fiber is affected due to the fact that the optical fiber abuts against the plastic sheath can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of laser emitting diodes, in particular to an improved structure of a laser emitting diode with a semiconductor cooler. Background Art

[0002] In the field of laser emitting diode technology, laser emitting diodes have been widely used. As a laser signal emitting device, the function of the laser diode is to convert electrical signals into optical signals, which are then focused and shaped by optical lenses and enter optical fibers to form stable optical signal transmission.

[0003] In the prior art, laser diodes with built-in thermoelectric coolers and thermistors have many internal structural elements, and the dimensional tolerance of the overall device package is difficult to control within a reasonable range. Therefore, the focusing and beam shaping lenses cannot be packaged in an integrated manner like ordinary laser diodes, and need to be separately coupled to the outside of the laser diode cap for light alignment and focal length control. In the existing packaging technology, since the laser diode cap is an iron-nickel alloy and the tube wall is very thin, it cannot be assembled and fixed by laser welding. It is mainly fixed by glue bonding, which requires glue dispensing and high-temperature baking. The process production efficiency is relatively low, and the glue has a certain toughness and a high thermal expansion and contraction coefficient. Therefore, the structural reliability and stability of the device are subject to certain limitations.

[0004] Regarding the above-mentioned relevant contents, the following technical defects exist: the surface of the optical fiber is relatively fragile, and there is no protection measure at the connection between the plastic sheath and the optical fiber. This is also because when the optical fiber or the plastic sheath moves under the influence of external media, the optical fiber will abut against the plastic sheath, causing the contact position between the optical fiber and the plastic sheath to bend, which will affect the service life of the optical fiber and the working effect of the optical fiber. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that the surface of the optical fiber is relatively fragile and there is no protective measure at the connection between the plastic sheath and the optical fiber. This is also the case when the optical fiber or the plastic sheath moves under the influence of external media, the optical fiber will abut against the plastic sheath, causing the contact position between the optical fiber and the plastic sheath to bend, thereby affecting the service life of the optical fiber and affecting the working effect of the optical fiber.

[0006] In order to solve the above technical problems, the utility model provides an improved structure of a laser emitting diode with a semiconductor refrigerator, comprising: an optical fiber and a diode base, a cavity is opened on one side of the diode base, a flat window cap is welded to the inner wall of the cavity, a thermoelectric cooler TEC is glued to the inner wall of the cavity, a laser diode chip is arranged on the side of the diode base close to the thermoelectric cooler TEC, a thermistor NTC is installed on the arc surface of the laser diode chip, the laser diode chip and the thermistor NTC are both glued to the thermoelectric cooler TEC, a plastic sheath is installed on one end of the arc surface of the optical fiber, a core steel clad needle is arranged on the inner wall of the plastic sheath, the core steel clad needle is fixedly connected to the optical fiber, a lap joint is welded to the inner wall of the plastic sheath, the optical fiber and the core steel clad needle are both welded to the lap joint, a metal shell is welded on the side of the plastic sheath close to the lap joint, the metal shell is welded to the cavity, and the metal shell is welded to the cavity. The inner wall is fixedly connected with a connecting ring, one side of the connecting ring is welded with an aspheric lens, a side of the connecting ring close to the aspheric lens is welded with a ring sleeve, the ring sleeve is welded to the cavity, an optical isolator is welded to the inner wall of the connecting ring, and an adjusting device is provided on the arc surface of the optical fiber, the adjusting device comprises a fixing ring, the fixing ring is fixedly connected with the optical fiber, a side of the fixing ring close to the plastic sheath is fixedly connected with a telescopic rod, an end of the telescopic rod away from the fixing ring is fixedly connected with a moving ring, both ends of the arc surface of the moving ring are fixedly connected with fixing rods, an adjusting block is slidably connected to the arc surface of the fixing rod, a first spring is slidably connected to the arc surface of the fixing rod, both ends of the first spring are fixedly connected to the moving ring and the adjusting block respectively, both ends of the side surface of the plastic sheath close to the moving ring are fixedly connected with connecting rods, two ends of the connecting rods away from the plastic sheath are fixedly connected with the same limiting ring, and both adjusting blocks slide through the inner wall of the limiting ring.

[0007] The effects achieved by the above components are as follows: the semiconductor thermoelectric cooler TEC is mounted on the diode base, the laser diode chip and the thermistor NTC are mounted on the semiconductor thermoelectric cooler TEC, the cavity is fixed on the diode base by laser welding, the non-spherical lens of the stainless steel shell and the optical isolator of the stainless steel shell are fixed on the connecting ring by laser welding, and then the laser diode is optically coupled, and the cavity and the connecting ring are fixed by welding through the ring sleeve, the metal shell is assembled and welded on the cavity, and then the optical fiber and the core steel needle are fixed by welding through the lap joint, and the outermost is protected by a plastic sheath. The welding point position can realize the optical alignment and structural fixation of the optical fiber and the laser diode chip, but the surface of the optical fiber is relatively fragile, and there is no protection measure at the connection between the plastic sheath and the optical fiber. This is also because when the optical fiber or the plastic sheath moves under the influence of external media, the optical fiber will abut against the plastic sheath, causing the contact position between the optical fiber and the plastic sheath to bend, which will affect the service life of the optical fiber and the working effect of the optical fiber. At this time, the connection between the optical fiber and the plastic sheath can be protected by an adjusting device to avoid abutment between the two, causing the optical fiber to bend and affecting the use effect of the optical fiber.

[0008] Preferably, the arc surfaces of the two connecting rods are both clamped with elastic buckles, and the two elastic buckles are fixedly connected to the same protective ring on one side away from the plastic sheath.

[0009] The effect achieved by the above components is: after the adjusting block is connected to the inside of the limiting ring, the elastic clip can be clamped on the connecting rod, and the surface of the adjusting block can be protected by using the protective ring installed on the elastic clip to avoid the risk of the adjusting block slipping out of the inner wall of the limiting ring when the adjusting block is accidentally pressed.

[0010] Preferably, a connecting groove is provided on the side surface of the elastic buckle.

[0011] The effect achieved by the above components is that when the elastic buckle is connected to the connecting rod, the connecting groove on the elastic buckle can improve the stability of the connection between the elastic buckle and the connecting rod, thereby improving the stability of the connection between the elastic buckle and the connecting rod through the connecting groove.

[0012] Preferably, a plurality of protrusions are fixedly connected to the arc surface of the moving ring, and the plurality of protrusions are evenly distributed on the arc surface of the moving ring.

[0013] The effect achieved by the above components is that when the moving ring is moved by the telescopic rod, the protrusion installed on the moving ring can increase the friction between the user's hand and the moving ring, thereby improving the efficiency of the user's movement of the moving ring through the protrusion.

[0014] Preferably, a pressing block is fixedly connected to a side of the adjusting block away from the fixing rod, and a cross section of the pressing block is arc-shaped.

[0015] The effect achieved by the above components is: when the adjusting block needs to be pressed by the fixing rod, the pressing block installed on the adjusting block can be used to press the adjusting block, and the pressing block can provide the user with the efficiency of pressing the adjusting block.

[0016] Preferably, the arc surface of the telescopic rod is sleeved with a second spring, and two ends of the second spring are fixedly connected to the fixed ring and the movable ring respectively.

[0017] The effect achieved by the above components is that when the moving ring moves toward the limiting ring under the action of the telescopic rod, the second spring can assist the telescopic rod in driving the moving ring to move toward the limiting ring, and the second spring can increase the speed of the moving ring.

[0018] Preferably, the connecting rod is a titanium alloy rod.

[0019] The effect achieved by the above components is that the surface of the connecting rod made of titanium alloy is relatively hard, which also makes it difficult for the surface of the connecting rod to deform after long-term use, and the service life is longer.

[0020] Compared with the related art, the improved structure of the laser emitting diode with a semiconductor cooler provided by the utility model has the following beneficial effects:

[0021] The utility model provides an improved structure of a laser emitting diode with a semiconductor refrigerator. By arranging an adjustment device, when an optical fiber is connected to a plastic sheath, the connection between the optical fiber and the plastic sheath can be protected by using the adjustment device. By protecting the connection between the optical fiber and the plastic sheath, it can be effectively avoided that the optical fiber and the plastic sheath abut against each other, resulting in bending of the optical fiber and affecting the service life of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an improved laser emitting diode with a semiconductor cooler provided by the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0024] Figure 3 for Figure 1 The structural schematic diagram of the regulating device shown;

[0025] Figure 4 for Figure 1 A partial structural schematic diagram of the regulating device shown;

[0026] Figure 5 for Figure 4 The enlarged view of point A is shown;

[0027] Figure 6 for Figure 1 A partially enlarged structural schematic diagram of the regulating device is shown.

[0028] Numbers in the figure: 1. diode base; 2. thermoelectric cooler TEC; 3. thermistor NTC; 4. laser diode chip; 5. flat window cap; 6. cavity; 7. aspheric lens; 8. ring sleeve; 9. connecting ring; 10. optical isolator; 11. metal shell; 12. lap joint; 13. core steel needle; 14. optical fiber; 15. plastic sheath; 16. adjustment device; 1601. fixing ring; 1602. telescopic rod; 1603. moving ring; 1604. fixing rod; 1605. adjusting block; 1606. first spring; 1607. limiting ring; 1608. connecting rod; 1609. protective ring; 1610. elastic buckle; 1611. connecting groove; 1612. bump; 1613. second spring; 1614. pressing block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0031] See also Figures 1 to 6The utility model provides an improved structure of a laser emitting diode with a semiconductor cooler, comprising: an optical fiber 14 and a diode base 1, a cavity 6 is provided on one side of the diode base 1, a flat window cap 5 is welded to the inner wall of the cavity 6, a thermoelectric cooler TEC2 is glued to the inner wall of the cavity 6, a laser diode chip 4 is provided on the side of the diode base 1 close to the thermoelectric cooler TEC2, a thermistor NTC3 is installed on the arc surface of the laser diode chip 4, the laser diode chip 4 and the thermistor NTC3 are glued to the thermoelectric cooler TEC2, a plastic sheath 15 is installed on one end of the arc surface of the optical fiber 14, and the plastic sheath 15 The inner wall is provided with a core steel clad needle 13, which is fixedly connected to the optical fiber 14, the inner wall of the plastic sheath 15 is welded with a lap joint 12, the optical fiber 14 and the core steel clad needle 13 are welded to the lap joint 12, the side of the plastic sheath 15 close to the lap joint 12 is welded with a metal shell 11, the metal shell 11 is welded to the cavity 6, the inner wall of the metal shell 11 is fixedly connected with a connecting ring 9, one side of the connecting ring 9 is welded with a non-spherical lens 7, the side of the connecting ring 9 close to the non-spherical lens 7 is welded with a ring sleeve 8, the ring sleeve 8 is welded to the cavity 6, the inner wall of the connecting ring 9 is welded with an optical isolator 10, and the arc surface of the optical fiber 14 is provided with an adjustment device 16.

[0032] In the embodiments of the present invention, please refer to Figures 1 to 6The adjusting device 16 includes a fixed ring 1601, which is fixedly connected to the optical fiber 14. A telescopic rod 1602 is fixedly connected to one side of the fixed ring 1601 close to the plastic sheath 15. A moving ring 1603 is fixedly connected to one end of the telescopic rod 1602 away from the fixed ring 1601. Both ends of the arc surface of the moving ring 1603 are fixedly connected to fixed rods 1604. The arc surface of the fixed rod 1604 is slidably connected to an adjusting block 1605. The arc surface of the fixed rod 1604 is slidably connected to a first spring 1606. Both ends of the first spring 1606 are fixedly connected to the moving ring 1603 and the adjusting block 1605, respectively. Both ends of the side surface of the plastic sheath 15 close to the moving ring 1603 are fixedly connected to connecting rods 1608. The two connecting rods 1608 are fixedly connected to the two ends of the plastic sheath 15. The end of the rod 1608 away from the plastic sheath 15 is fixedly connected to the same limiting ring 1607, and the two adjustment blocks 1605 are slidably penetrated with the inner wall of the limiting ring 1607. The semiconductor thermoelectric cooler TEC2 is mounted on the diode base 1, and then the laser diode chip 4 and the thermistor NTC3 are mounted on the semiconductor thermoelectric cooler TEC2. The external cavity 6 is fixed to the diode base 1 by laser welding, and the non-spherical lens 7 of the stainless steel shell and the optical isolator 10 of the stainless steel shell are fixed to the connecting ring 9 by laser welding, and then optical coupling is performed with the laser diode, and the cavity 6 and the connecting ring 9 are fixed by welding through the ring sleeve 8, the metal shell 11 is assembled and welded to the cavity 6, and then the optical fiber 14 is installed. The core steel clad needle 13 is welded and fixed by the lap joint 12, and the plastic sheath 15 is used on the outermost side to protect the welding point position, so as to achieve optical alignment and structural fixation of the optical fiber 14 and the laser diode chip 4. However, the surface of the optical fiber 14 is relatively fragile, and there is no protection measure at the connection between the plastic sheath 15 and the optical fiber 14. This is also because when the optical fiber 14 or the plastic sheath 15 moves under the influence of external media, the optical fiber 14 will abut against the plastic sheath 15, causing the contact position between the optical fiber 14 and the plastic sheath 15 to bend, which will affect the service life of the optical fiber 14 and the working effect of the optical fiber 14. At this time, the connection between the optical fiber 14 and the plastic sheath 15 can be protected by the adjustment device 16. , so as to avoid the two from abutting against each other, causing the optical fiber 14 to bend and affecting the use effect of the optical fiber 14. The arc surfaces of the two connecting rods 1608 are both clamped with elastic buckles 1610. The two elastic buckles 1610 are fixedly connected with the same protective ring 1609 on the side away from the plastic sheath 15. After the adjustment block 1605 is connected to the inside of the limiting ring 1607, the elastic buckle 1610 can be clamped on the connecting rod 1608. The protective ring 1609 installed on the elastic buckle 1610 is used to protect the surface of the adjustment block 1605 to avoid the risk of the adjustment block 1605 slipping out of the inner wall of the limiting ring 1607 when the adjustment block 1605 is pressed by mistake. A connecting groove 1611 is provided on the side of the elastic buckle 1610.When the elastic buckle 1610 is connected to the connecting rod 1608, the connecting groove 1611 provided on the elastic buckle 1610 can improve the stability of the connection between the elastic buckle 1610 and the connecting rod 1608, thereby improving the stability of the connection between the elastic buckle 1610 and the connecting rod 1608 through the connecting groove 1611. The arc surface of the moving ring 1603 is fixedly connected with a plurality of protrusions 1612, and the plurality of protrusions 1612 are evenly distributed on the moving ring 1603. On the arc surface, when the mobile ring 1603 is moved by the telescopic rod 1602, the protrusion 1612 installed on the mobile ring 1603 can increase the friction between the user's hand and the mobile ring 1603, so that the user's efficiency in moving the mobile ring 1603 can be improved by the protrusion 1612. The side of the adjustment block 1605 away from the fixed rod 1604 is fixedly connected with a pressing block 1614. The cross-section of the pressing block 1614 is arc-shaped, and it needs to be pressed by the fixed rod 1604. 04 to press the adjusting block 1605, the pressing block 1614 installed on the adjusting block 1605 can be used to press the adjusting block 1605, and the pressing block 1614 can provide the user with the efficiency of pressing the adjusting block 1605. The arc surface of the telescopic rod 1602 is sleeved with a second spring 1613, and the two ends of the second spring 1613 are respectively fixedly connected to the fixed ring 1601 and the moving ring 1603. When the moving ring 1603 moves in the direction of the limit ring 1607 under the action of the telescopic rod 1602, the second spring 1613 can assist the telescopic rod 1602 to drive the moving ring 1603 to move in the direction of the limit ring 1607. The second spring 1613 can increase the speed of the moving ring 1603. The connecting rod 1608 is a titanium alloy rod. The connecting rod 1608 made of titanium alloy has a relatively hard rod surface, which also makes it difficult for the connecting rod 1608 to deform its rod surface after long-term use, and has a longer service life. ,

[0033] The working principle of the improved structure of a laser emitting diode with a semiconductor cooler provided by the utility model is as follows: when it is necessary to protect the connection between the optical fiber 14 and the plastic sheath 15, the adjusting block 1605 is pressed, and the adjusting block 1605 moves and slides on the surface of the fixed ring 1601, and at the same time, it also drives the first spring 1606 to be rolled up, and then the moving ring 1603 is moved toward the direction of the limiting ring 1607 installed on the connecting rod 1608 through the telescopic rod 1602. When the moving ring 1603 drives the adjusting block 1605 to connect with the inner wall of the limiting ring 1607, the first spring 1606 drives the adjusting block 1605 from the inner wall of the limiting ring 1607. The adjusting block 1605 can be connected to the inner wall of the limiting ring 1607 through the adjusting block 1605, so that the connection between the optical fiber 14 and the plastic sheath 15 can be protected. The adjusting device 16 can prevent the connection between the two from bending, thereby improving the service life of the optical fiber 14. After the adjusting block 1605 is connected to the inside of the limiting ring 1607, the elastic buckle 1610 can be clamped on the connecting rod 1608. The surface of the adjusting block 1605 is protected by using the protective ring 1609 installed on the elastic buckle 1610 to avoid the risk of the adjusting block 1605 slipping out of the inner wall of the limiting ring 1607 when the adjusting block 1605 is pressed by mistake. The elastic buckle 161 0 is connected to the connecting rod 1608, the connecting groove 1611 provided on the elastic buckle 1610 can improve the stability of the connection between the elastic buckle 1610 and the connecting rod 1608, so that the stability of the connection between the elastic buckle 1610 and the connecting rod 1608 can be improved through the connecting groove 1611. When the mobile ring 1603 is moved by the telescopic rod 1602, the protrusion 1612 installed on the mobile ring 1603 can improve the friction between the user's hand and the mobile ring 1603, so that the user's efficiency in moving the mobile ring 1603 can be improved through the protrusion 1612. When it is necessary to press the adjustment block 1605 through the fixed rod 1604, the adjustment block 1605 can be used. The pressing block 1614 installed on the section block 1605 is used to press the adjusting block 1605. The pressing block 1614 can provide the user with the efficiency of pressing the adjusting block 1605. When the moving ring 1603 moves in the direction of the limiting ring 1607 under the action of the telescopic rod 1602, the second spring 1613 can assist the telescopic rod 1602 to drive the moving ring 1603 to move in the direction of the limiting ring 1607. The second spring 1613 can increase the speed of the movement of the moving ring 1603. The connecting rod 1608 made of titanium alloy has a harder rod surface, which also makes it difficult for the connecting rod 1608 to deform its rod surface after long-term use, and has a longer service life.

[0034] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An improved structure of a laser emitting diode with a semiconductor cooler, characterized in that: include: An optical fiber (14) and a diode base (1), a cavity (6) is provided on one side of the diode base (1), a flat window cap (5) is welded to the inner wall of the cavity (6), a thermoelectric cooler TEC (2) is glued to the inner wall of the cavity (6), a laser diode chip (4) is provided on the side of the diode base (1) close to the thermoelectric cooler TEC (2), a thermistor NTC (3) is installed on the arc surface of the laser diode chip (4), the laser diode chip (4) and the thermistor NTC (3) are both glued to the thermoelectric cooler TEC (2), a plastic sheath (15) is installed on one end of the arc surface of the optical fiber (14), and the plastic The inner wall of the sheath (15) is provided with a core-inserted steel-clad needle (13), and the core-inserted steel-clad needle (13) is fixedly connected to the optical fiber (14). The inner wall of the plastic sheath (15) is welded with a lap joint (12), and the optical fiber (14) and the core-inserted steel-clad needle (13) are both welded to the lap joint (12). A metal shell (11) is welded to the side of the plastic sheath (15) close to the lap joint (12), and the metal shell (11) is welded to the cavity (6). A connecting ring (9) is fixedly connected to the inner wall of the metal shell (11), and a non-spherical lens (7) is welded to one side of the connecting ring (9), and a non-spherical lens (7) is welded to the side of the connecting ring (9) close to the non-spherical lens (7). The ring sleeve (8) is welded to the cavity (6); the inner wall of the connecting ring (9) is welded with an optical isolator (10); the arc surface of the optical fiber (14) is provided with an adjustment device (16); the adjustment device (16) comprises a fixing ring (1601); the fixing ring (1601) is fixedly connected to the optical fiber (14); a telescopic rod (1602) is fixedly connected to a side of the fixing ring (1601) close to the plastic sheath (15); an end of the telescopic rod (1602) away from the fixing ring (1601) is fixedly connected to a moving ring (1603); and both ends of the arc surface of the moving ring (1603) are fixedly connected to the fixing rod (1602). 4), the arc surface of the fixed rod (1604) is slidably connected to an adjusting block (1605), the arc surface of the fixed rod (1604) is slidably connected to a first spring (1606), the two ends of the first spring (1606) are respectively fixedly connected to the moving ring (1603) and the adjusting block (1605), the two ends of the side of the plastic sheath (15) close to the moving ring (1603) are fixedly connected to connecting rods (1608), the ends of the two connecting rods (1608) away from the plastic sheath (15) are fixedly connected to the same limiting ring (1607), and the two adjusting blocks (1605) are slidably penetrated with the inner wall of the limiting ring (1607).

2. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 1, characterized in that: The arc surfaces of the two connecting rods (1608) are both clamped with elastic buckles (1610), and the two elastic buckles (1610) are fixedly connected to the same protective ring (1609) on the side away from the plastic sheath (15).

3. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 2, characterized in that: A connecting groove (1611) is formed on the side of the elastic buckle (1610).

4. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 1, characterized in that: The arc surface of the moving ring (1603) is fixedly connected with a plurality of protrusions (1612), and the plurality of protrusions (1612) are evenly distributed on the arc surface of the moving ring (1603).

5. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 1, characterized in that: A pressing block (1614) is fixedly connected to a side of the adjusting block (1605) away from the fixing rod (1604), and the cross section of the pressing block (1614) is arc-shaped.

6. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 1, characterized in that: The arc surface of the telescopic rod (1602) is sleeved with a second spring (1613), and the two ends of the second spring (1613) are respectively fixedly connected to the fixed ring (1601) and the movable ring (1603).

7. The improved structure of a laser emitting diode with a semiconductor cooler according to claim 1, characterized in that: The connecting rod (1608) is a titanium alloy rod.

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