Aging device for high-power semiconductor laser with anti-backlight

Abstract

The application discloses a kind of high-power semiconductor laser aging devices of preventing return light, comprising: DCC fixed frame, one end is detachably connected with DCC water-cooled optical cable;Lens fixed seat is detachably set in the end of DCC fixed frame away from DCC water-cooled optical cable, the lens fixed seat is provided with the installation groove for the reflecting lens to be installed with 5-11 degrees inclination;Heat absorption component is set in the side of lens fixed seat away from DCC fixed frame, to absorb heat in the process of laser aging test.The application, first, use conical divergent laser, make it reflect in water aluminum shell, make reflected laser heat be absorbed by water-cooled cavity;Second, use photodiode to detect cavity internal laser, judge laser power through system, achieve the purpose of protecting laser;Third, through the setting of internal reflecting lens, prevent internal laser from returning to input cable output head or optical fiber and other light sources through internal cavity diffuse reflection, reduce damage risk.

Description

Technical Field

[0001] This invention relates to the field of semiconductor laser technology, and in particular to a high-power semiconductor laser aging device that prevents backlighting. Background Technology

[0002] Semiconductor lasers are used in many fields such as communications, military, and medical, and market demand continues to grow. Before they are put into use, they need to undergo aging tests to ensure stable performance. The laser receiver and power monitoring device is the core component of the aging test system, which is directly related to the test accuracy and laser safety.

[0003] In traditional semiconductor laser aging tests, laser receivers often use cavity spherical integrating spheres, which have high power testing accuracy. However, when applied to aging systems, they have two major problems that make them difficult to adapt to actual needs and cost control requirements.

[0004] On the one hand, integrating spheres are expensive, and aging tests are large-scale tests. Large-scale applications will significantly increase system costs, which is not conducive to market promotion. On the other hand, reflected light will be generated during the aging process. If the reflected light re-enters the laser, it will break through the internal optical components and cause irreversible damage, which will affect the test progress and increase device losses. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned above by providing a high-power semiconductor laser aging device that prevents backlighting, effectively suppresses backlighting, is compatible with high-power semiconductor laser power testing, and has low manufacturing costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-power semiconductor laser aging device for preventing backlighting, comprising: DCC mounting bracket, one end of which is detachably connected to the DCC water-cooled optical cable; The lens holder is detachably mounted on the end of the DCC mounting bracket away from the DCC water-cooled optical cable. The lens holder is provided with a mounting groove for mounting the reflective lens at an angle of 10 degrees. A heat absorption component, located on the side of the lens holder away from the DCC mounting bracket, is used to absorb heat during the laser aging test. The heat absorption component includes a water-cooled heat absorption part, which includes an inner sleeve. The outer wall of the inner sleeve is provided with a spiral guide groove. One end of the inner sleeve is provided with a reflective cone for reflecting the laser towards the inner wall of the inner sleeve. The water-cooled heat absorption part also includes a flow channel control structure sleeved outside the inner sleeve, which can form a spiral flow channel with the inner sleeve to guide the flow of water and can adjust the flow velocity of the water at various positions within the spiral flow channel. The flow channel control structure is provided with at least one inlet and at least one outlet communicating with the spiral flow channel.

[0007] Furthermore, the heat absorption component also includes a PD light detection component, which is disposed between the water-cooled heat absorption component and the lens holder, and is used to detect the light power parameters in the water-cooled heat absorption component.

[0008] Furthermore, the PD light detection component includes a PD detection tube and a mounting base for mounting the PD detection tube. The mounting base is provided with a water-cooling channel for heat dissipation, and the inner sleeve is located on the side of the mounting base away from the lens fixing base.

[0009] Furthermore, the flow channel control structure includes an outer sleeve fitted outside the inner sleeve. The inner diameter of the outer sleeve is larger than the outer diameter of the spiral guide groove. The outer sleeve is detachably provided with multiple spiral blades with the same pitch as the spiral guide groove. The minimum diameter of the inner ring of the multiple spiral blades is equal to the maximum outer diameter of the spiral guide groove, and the diameter of the outer ring of the multiple spiral blades is equal to the inner diameter of the outer sleeve. At least one through hole is provided on the multiple spiral blades to connect adjacent spiral segments.

[0010] Furthermore, the multi-turn spiral blade is composed of multiple single-turn spiral blades. Each single-turn spiral blade is provided with at least one positioning block that is inserted into the outer sleeve. The outer sleeve is provided with a positioning groove for the positioning block to slide. The flow channel control structure also includes a detachable stop block provided in the positioning groove, which is used to prevent the single-turn spiral blade from sliding along the positioning groove after each single-turn spiral blade is installed in place.

[0011] Furthermore, the DCC mounting bracket is equipped with a window to prevent dust from entering the lens mounting bracket from the DCC water-cooled optical cable side, and a photosensitive probe for optical path monitoring.

[0012] The beneficial effects of this invention are reflected in: This invention has three main features: First, it utilizes a conical diverging laser beam to reflect it within a water-cooled aluminum housing, allowing the heat from the reflected laser to be absorbed by the water-cooled cavity. Second, it employs a photodiode to detect the laser inside the cavity and determines the laser power through a system, thereby protecting the laser. Third, it uses internal reflective mirrors to prevent the internal laser from being diffusely reflected back into the input optical cable output head or other light sources through the internal cavity, reducing the risk of damage. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram showing the connection between the DCC mounting bracket and the lens mounting base of the present invention; Figure 3 This is a cross-sectional view of the outer sleeve in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the single-turn spiral blade of the present invention; Figure 5 This is a cross-sectional view of the outer sleeve in another embodiment of the present invention; Figure 6 This is a cross-sectional view of the inner sleeve of the present invention.

[0014] In the picture: 1. DCC mounting bracket; 2. Lens mounting base; 3. Heat absorption assembly; 31. PD light detection component; 32. Inner sleeve; 33. Reflector cone; 34. Outer sleeve; 35. Multi-turn spiral blade; 351. Single-turn spiral blade; 352. Positioning block; 36. Stop block. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-6 This invention discloses an anti-backlight aging device for high-power semiconductor lasers, comprising: DCC mounting bracket 1, one end of which is detachably connected to the DCC water-cooled optical cable; The lens mounting base 2 is detachably installed at the end of the DCC mounting bracket 1 away from the DCC water-cooled optical cable. The lens mounting base 2 is provided with a mounting groove for the reflective lens to be installed at an angle of 5 to 11 degrees. The heat absorption component 3 is located on the side of the lens holder 2 away from the DCC holder 1 and is used to absorb heat during the laser aging test. The heat absorption component 3 includes a water-cooled heat absorption component, which includes an inner sleeve 32. The outer wall of the inner sleeve 32 is provided with a spiral guide groove. One end of the inner sleeve 32 is provided with a reflective cone 33 for reflecting the laser to the inner wall of the inner sleeve 32. The water-cooled heat absorption component also includes a flow channel control structure sleeved outside the inner sleeve 32, which can form a spiral flow channel with the inner sleeve 32 to guide the flow of water and can adjust the flow velocity of the water at various positions in the spiral flow channel. The flow channel control structure is provided with at least one inlet and at least one outlet communicating with the spiral flow channel.

[0017] This invention achieves a detachable connection with the DCC water-cooled optical cable through the DCC mounting bracket 1, facilitating the overall installation, debugging, and disassembly maintenance of the device, and adapting to modular aging test scenarios. The mounting slot of the lens mounting base 2 limits the installation of the reflective lens at an angle of 5 to 11 degrees, preferably at an angle of 8 degrees. This angle can change the laser reflection path, effectively blocking the backlight from entering the semiconductor laser and preventing damage to the internal optical components of the laser, thus structurally achieving the core function of preventing backlight. The heat absorption component 3 specifically absorbs the large amount of heat generated during high-power laser aging tests, preventing heat accumulation from damaging device components and the laser, adapting to the aging test requirements of high-power scenarios. The overall structure is simple and compact, eliminating the need for an expensive integrating sphere, effectively controlling costs while ensuring the reliability of backlight prevention and high-power adaptability, and adapting to the use requirements of large-scale aging tests of semiconductor lasers.

[0018] It should be noted that this aging device can also be used with other laser input methods, such as QBH or fiber optic access, simply by replacing DCC mounting bracket 1 with the corresponding mounting bracket.

[0019] In one embodiment, the heat absorption component 3 further includes a PD light detection component 31, which is disposed between the water-cooled heat absorption component and the lens mounting base 2, and is used to detect the light power parameters in the water-cooled heat absorption component.

[0020] This design allows the PD optical detection component to monitor optical power parameters in real time and accurately determine whether the laser is outputting normally, meeting the core requirements for troubleshooting in aging tests. It eliminates the need for expensive integrating sphere devices, effectively controlling costs.

[0021] In one embodiment, the PD light detection component 31 includes a PD detection tube and a mounting base for mounting the PD detection tube. The mounting base is provided with a water-cooling channel for heat dissipation, and the inner sleeve 32 is located on the side of the mounting base away from the lens fixing base 2.

[0022] This design allows the water-cooling channel to specifically dissipate heat from the PD detection tube, avoiding the impact of heat generated during high-power laser testing on detection accuracy and ensuring the accuracy of fault diagnosis. At the same time, it simplifies the heat dissipation structure, reduces manufacturing costs, and balances detection reliability and economy.

[0023] In one embodiment, the flow channel control structure includes an outer sleeve 34 sleeved outside the inner sleeve 32. The inner diameter of the outer sleeve 34 is larger than the outer diameter of the spiral guide groove. The outer sleeve 34 is detachably provided with a multi-turn spiral blade 35 with the same pitch as the spiral guide groove. The minimum diameter of the inner turn of the multi-turn spiral blade 35 is equal to the maximum outer diameter of the spiral guide groove, and the diameter of the outer turn of the multi-turn spiral blade 35 is equal to the inner diameter of the outer sleeve 34. At least one through hole is provided on the multi-turn spiral blade 35 to connect adjacent spiral segments.

[0024] This design allows the reflective cone to reflect the laser to the inner wall of the inner sleeve, extending the laser propagation path to fully absorb heat. The spiral flow channel increases the water-cooling contact area and extends the water flow residence time, improving heat dissipation efficiency and adapting to the heat absorption requirements of high-power lasers. The internal multi-turn spiral blades 35 allow for adjustment of the water flow rate in different areas, thereby meeting the heat dissipation needs of lasers at different locations or with different power levels, offering high flexibility. At the same time, the structure is simple, significantly reducing costs compared to integrating spheres, balancing high-power adaptability with cost control.

[0025] Specifically, the inner surface of the inner sleeve 32 is coated with aluminum oxide and sandblasted, and the surface of the reflective cone 33 needs to be ultra-precision machined to achieve a mirror effect with a roughness of less than 0.1.

[0026] In one embodiment, the multi-turn spiral blade 35 is composed of multiple single-turn spiral blades 351. Each single-turn spiral blade 351 is provided with at least one positioning block 352 that is inserted into the outer sleeve 34. The outer sleeve 34 is provided with a positioning groove for the positioning block 352 to slide. The flow channel control structure also includes a stop block 36 that is detachably provided in the positioning groove, which is used to prevent the single-turn spiral blade 351 from sliding along the positioning groove after each single-turn spiral blade 351 is installed in place.

[0027] This design allows operators to select and splice the required single-turn spiral plates 351 according to their needs, forming multi-turn spiral plates 35 with different connectivity states, making operation more flexible and reducing adjustment costs.

[0028] Specifically, when installing the single-turn spiral blade 351, the single-turn spiral blade 351 can be slightly squeezed and deformed so that it can enter through the opening of the outer sleeve 34 and then unfold and install inside it.

[0029] In another embodiment, the inner diameter of the outer sleeve 34 is equal to the maximum outer diameter of the spiral guide groove. Therefore, when facing high heat dissipation requirements, there is no need to select the corresponding single-turn spiral blade 351 for splicing and combination. Simply put the outer sleeve 34 on it to form the longest flow channel in the water flow area, ensuring that heat can be carried away in time and improving the changeover speed.

[0030] In one embodiment, the DCC mounting bracket 1 is provided with a window for preventing dust from entering the lens mounting base 2 from the DCC water-cooled optical cable side, and a photosensitive probe for optical path monitoring.

[0031] This design allows the window to prevent dust from contaminating the reflective lens, thus avoiding any impact on the anti-reflection effect and optical path stability. The photosensitive probe assists in monitoring the optical path status, promptly detecting optical path anomalies and reducing the risk of device damage. The overall structure balances protection and monitoring, eliminating the need for additional complex components, thereby improving device reliability while controlling costs.

[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] Additionally, "multiple" refers to two or more.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-power semiconductor laser aging device for preventing backlighting, characterized in that, include: DCC mounting bracket (1), one end of which is detachably connected to DCC water-cooled optical cable; The lens holder (2) is detachably installed at the end of the DCC mounting bracket (1) away from the DCC water-cooled optical cable. The lens holder (2) is provided with an installation groove for the reflective lens to be installed at an angle of 5 to 11 degrees. A heat absorption component (3) is disposed on the side of the lens holder (2) away from the DCC holder (1) to absorb heat during the laser aging test. The heat absorption component (3) includes a water-cooled heat absorption component, which includes an inner sleeve (32). The outer wall of the inner sleeve (32) is provided with a spiral guide groove. One end of the inner sleeve (32) is provided with a reflective cone (33) for reflecting the laser to the inner wall of the inner sleeve (32). The water-cooled heat absorption component also includes a flow channel control structure sleeved outside the inner sleeve (32), which can form a spiral flow channel with the inner sleeve (32) to guide the flow of water and can adjust the flow velocity of water at each position in the spiral flow channel. The flow channel control structure is provided with at least one inlet and at least one outlet connected to the spiral flow channel.

2. The anti-backlighting high-power semiconductor laser aging device according to claim 1, characterized in that: The heat absorption component (3) also includes a PD light detection component (31), which is disposed between the water-cooled heat absorption component and the lens holder (2) and is used to detect the light power parameters in the water-cooled heat absorption component.

3. The anti-backlighting high-power semiconductor laser aging device according to claim 2, characterized in that: The PD light detection component (31) includes a PD detection tube and a mounting base for mounting the PD detection tube. The mounting base is provided with a water-cooling channel for heat dissipation. The inner sleeve (32) is located on the side of the mounting base away from the lens fixing base (2).

4. The anti-backlighting high-power semiconductor laser aging device according to claim 3, characterized in that: The flow channel control structure includes an outer sleeve (34) sleeved outside the inner sleeve (32). The inner diameter of the outer sleeve (34) is larger than the outer diameter of the spiral guide groove. The outer sleeve (34) is detachably provided with a multi-turn spiral blade (35) with the same pitch as the spiral guide groove. The minimum diameter of the inner circle of the multi-turn spiral blade (35) is equal to the maximum outer diameter of the spiral guide groove, and the outer diameter of the multi-turn spiral blade (35) is equal to the inner diameter of the outer sleeve (34). At least one through hole is provided on the multi-turn spiral blade (35) to connect adjacent spiral segments.

5. The anti-backlighting high-power semiconductor laser aging device according to claim 4, characterized in that: The multi-turn spiral blade (35) is composed of multiple single-turn spiral blades (351). Each single-turn spiral blade (351) is provided with at least one positioning block (352) that is inserted into the outer sleeve (34). The outer sleeve (34) is provided with a positioning groove for the positioning block (352) to slide. The flow channel control structure also includes a stop block (36) that is detachably provided in the positioning groove, which is used to prevent the single-turn spiral blade (351) from sliding along the positioning groove after each single-turn spiral blade (351) is installed in place.

6. The anti-backlighting high-power semiconductor laser aging device according to claim 1, characterized in that: The DCC mounting bracket (1) is equipped with a window to prevent dust from entering the lens mounting base (2) from the DCC water-cooled optical cable side, and a photosensitive probe for optical path monitoring.

Images