Tunable He-Ne laser

Abstract

The utility model discloses a tunable He-Ne laser, which comprises a laser body and a getter structure, a cavity is arranged in the laser body, a plurality of electrodes are packaged on the laser body, a plurality of guide holes communicated with the cavity are arranged on the wall surface of the cavity, and the plurality of guide holes are in one-to-one correspondence with the plurality of electrodes. At least one guide hole extends back to the corresponding electrode to form a getter chamber capable of accommodating a getter structure, and the getter structure is arranged in the getter chamber. On the premise that the function of the getter is not affected, the problems of long processing and manufacturing period and low benefit caused by long-time polishing due to a conventional slotting optical cement packaging mode of the getter are solved, the method is simple and practical, and the process is mature and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of laser preparation, in particular to a tunable He-Ne laser. Background Technique

[0002] The tunable He-Ne laser is a new type of He-Ne laser. It uses quartz glass or microcrystalline glass as the cavity material, has a stable structure, small volume, impact resistance, and adjustable wavelength, and has great application potential. As Figure 1 shown, it is a schematic structural diagram of a conventional tunable He-Ne laser. The laser body 1 therein has an elongated cavity 11 for containing He-Ne gas and forming a laser path. The surface of the laser body 1 is encapsulated with a main anode 3, a cathode 4, and a pumping anode 5. Main anode guide holes 13 extending to conduct with the main anode 3, cathode guide holes 14 conducting with the cathode 4, and pumping anode guide holes 15 conducting with the pumping anode 5 are respectively formed on the wall surface of the cavity 11. However, during the use and storage of the tunable He-Ne laser, the release of trace residual gas inside the cavity 11 affects its working performance and seriously affects its service life. Therefore, an absorbent is generally placed at an appropriate position in the tunable He-Ne laser to adsorb the residual gas in the cavity 11. The absorbent is a special functional material that can effectively absorb active gases (H2, CO, O2, N2, CO2, C m H m etc.) through physical and chemical actions. As Figure 1 shown, generally, a receiving groove 18 for placing the absorbent is formed on the tunable He-Ne laser body, and an absorbent guide hole 19 communicating with the cavity 11 of the tunable He-Ne laser is formed at the bottom of the receiving groove 18. After the absorbent structure 2 is placed in the receiving groove 18, optical adhesive encapsulation is generally performed using an encapsulating glass 8 (that is, without using an adhesive, the encapsulating glass 8 is adsorbed to the laser body 1 through the intermolecular attraction on the surface). The optical adhesive encapsulation has extremely high surface profile accuracy and defect requirements for the two surfaces to be optically adhered, and the surfaces to be optically adhered need to be polished for a long time, resulting in a long processing and manufacturing cycle and low efficiency. Summary of the Utility Model

[0003] Aiming at the problems in the background technique, the utility model proposes a tunable He-Ne laser with high manufacturing efficiency and low production cost.

[0004] The utility model adopts the following technical solutions:

[0005] An adjustable He-Ne laser includes a laser body and a getter structure. The laser body has a cavity, and a plurality of electrodes are encapsulated on the laser body. A plurality of guide holes communicating with the cavity are formed on the cavity wall surface. The plurality of guide holes correspond to the plurality of electrodes one by one. At least one guide hole extends backward from the corresponding electrode to form a getter chamber capable of accommodating the getter structure, and the getter structure is arranged in the getter chamber.

[0006] Preferably, the getter chamber extends along the radial direction of the corresponding guide hole to form a stop step for preventing the getter structure from falling into the cavity.

[0007] Preferably, the getter structure includes a snap ring and a getter assembly, and the snap ring abuts between the stop step and the getter assembly.

[0008] Preferably, the outer diameter of the getter assembly is less than or equal to the aperture of the corresponding guide hole, the outer diameter of the snap ring is greater than the aperture of the corresponding guide hole and less than or equal to the aperture of the getter chamber, and the snap ring can radially contract so as to enter the getter chamber from the corresponding guide hole.

[0009] Preferably, the getter assembly includes a tray and a getter body, and the getter body is placed in the tray.

[0010] Preferably, the plurality of electrodes include a main anode, a cathode and an extraction anode, and the plurality of guide holes include a main anode guide hole extending from the cavity wall surface to conduct with the main anode, a cathode guide hole extending from the cavity wall surface to conduct with the cathode, and an extraction anode guide hole extending from the cavity wall surface to conduct with the extraction anode.

[0011] Preferably, the cavity is an elongated structure. A reflecting mirror is encapsulated at one end of the laser body along the extending direction of the cavity, and an output mirror is encapsulated at the other end. Both ends of the cavity along its extending direction are respectively communicated with the reflecting mirror and the output mirror through air chambers.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] For the adjustable He-Ne laser of the present utility model, by extending one of the electrode guide holes of the adjustable He-Ne laser backward from the corresponding electrode to form a getter chamber capable of accommodating the getter structure, it is possible to avoid the problems of long processing and manufacturing cycle and low efficiency caused by long-time polishing in the conventional method of encapsulating the getter by grooving and photo-cementing without affecting the function of the getter. The method is simple and practical, and the process is mature and reliable.

[0014] In addition, the electrode and the getter structure are separately arranged on both sides of the cavity, which can avoid the damage to the indium sealing structure of the electrode when the getter is activated. Description of the Drawings

[0015] To facilitate a better understanding of the present utility model, the present utility model will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. These drawings only depict typical embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model.

[0016] Figure 1 It is a schematic structural diagram of a prior art tunable He-Ne laser.

[0017] Figure 2 It is a schematic structural diagram of the tunable He-Ne laser according to an embodiment of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the getter chamber and the corresponding guide holes communicating with each other according to an embodiment of the present utility model.

[0019] Figure 4 It is a schematic structural diagram of the getter installed in the getter chamber according to an embodiment of the present utility model.

[0020] Figure 5 It is a schematic structural diagram of the snap ring according to an embodiment of the present utility model.

[0021] Figure 6 It is a schematic structural diagram of the tray according to an embodiment of the present utility model.

[0022] Figure 7 It is a schematic structural diagram of the getter according to an embodiment of the present utility model.

[0023] Reference numerals:

[0024] 1. Laser body; 11. Cavity; 2. Getter structure; 21. Snap ring; 22. Tray; 23. Getter body; 12. Getter chamber; 13. Main anode guide hole; 14. Cathode guide hole; 15. Exhaust anode guide hole; 17. Stopping step; 18. Accommodating groove; 19. Getter guide hole; 3. Main anode; 4. Cathode; 5. Exhaust anode; 6. Reflective lens; 7. Output lens; 8. Encapsulation glass. Specific embodiments

[0025] The following describes the embodiments of the present utility model with reference to the accompanying drawings, so that those skilled in the art can better understand the present utility model and implement it, but the listed embodiments are not intended to limit the present utility model. Without conflict, the following embodiments and the technical features in the embodiments can be combined with each other, and the same components are denoted by the same reference numerals.

[0026] As Figure 2As shown in the figure, the tunable He-Ne laser of this embodiment includes a laser body 1 and a getter structure 2. The laser body 1 has a cavity 11 inside. A plurality of electrodes are encapsulated on the laser body 1. A plurality of guide holes communicating with the cavity 11 are formed on the wall surface of the cavity 11. The plurality of guide holes correspond to the plurality of electrodes one by one. At least one guide hole extends back towards the corresponding electrode to form a getter chamber 12 capable of accommodating the getter structure 2, and the getter structure 2 is arranged in the getter chamber 12.

[0027] Thus, without affecting the function of the getter, the present utility model avoids the problems of long processing and manufacturing cycle and low efficiency caused by long-time polishing in the conventional method of encapsulating the getter with grooved optical glue. The method is simple and practical, and the process is mature and reliable.

[0028] In addition, the electrode and the getter structure are arranged on both sides of the cavity, which can avoid the damage to the indium sealing structure of the electrode when the getter is activated.

[0029] During the use of the laser, the orientation will inevitably change. In this embodiment, as Figure 3 shown, to prevent the getter structure from falling into the cavity 11, the getter chamber 12 extends along the radial direction of the corresponding guide hole to form a stop step 17, and the stop step 17 is used to stop the getter structure 2 from falling into the cavity 11.

[0030] In this embodiment, as Figure 4 shown, to further prevent the getter structure from falling into the cavity 11 and prevent the getter from being broken due to back-and-forth collisions, the getter structure 2 includes a snap ring 21 and a getter assembly. The snap ring 21 abuts between the stop step 17 and the getter assembly.

[0031] In this embodiment, as Figure 4 and Figure 5 shown, to facilitate the entry of the getter structure 2 from the narrow guide hole into the getter chamber 12, the outer diameter of the getter assembly is less than or equal to the aperture of the corresponding guide hole, the outer diameter of the snap ring 21 is greater than the aperture of the corresponding guide hole and less than or equal to the aperture of the getter chamber 12, and the snap ring 21 can be radially contracted so as to enter the getter chamber 12 from the corresponding guide hole. Thus, the getter assembly can freely pass through the guide hole to reach the bottom of the getter chamber 12. Since the snap ring 21 can be contracted, by clamping the snap ring opening 211 with a snap ring pliers or tweezers and then tightening, the snap ring 21 can be radially contracted to make its outer diameter less than the aperture of the corresponding guide hole, sent into the guide hole and then the snap ring pliers or tweezers are released. The snap ring 2 is stuck in the guide hole, and the snap ring 21 is pushed to reach the getter chamber 12 by means of a tool such as a bar with an inner diameter close to that of the guide hole. The snap ring 21 returns to its original state and abuts between the stop step 17 and the getter assembly.

[0032] In this embodiment, as Figure 4 、 Figure 6 and Figure 7As shown, the getter assembly includes a tray 23 and a getter body 22, and the getter body 22 is placed in the tray 23.

[0033] In this embodiment, as Figure 2 shown, the multiple electrodes include a main anode 3, a cathode 4, and an extraction anode 5, and the multiple guide holes include a main anode guide hole 13 extending from the wall surface of the cavity 11 to conduct with the main anode 3, a cathode guide hole 14 extending from the wall surface of the cavity 11 to conduct with the cathode 4, and an extraction anode guide hole 15 extending from the wall surface of the cavity 11 to conduct with the extraction anode 5.

[0034] Specifically, in this embodiment, after the extraction anode guide hole 15 intersects and conducts with the cavity 11, it continues to extend away from the extraction anode 5 to form a getter chamber 12, and the aperture of the getter chamber 12 is larger than that of the extraction anode guide hole 15. Thus, the getter chamber 12 is connected to the extraction anode guide hole 15, the cavity 11, the main anode guide hole 13, and the cathode guide hole 14, and the He-Ne gas can flow and exchange freely among them, and the trace residual gas released inside the cavity can reach the getter chamber 12 and be adsorbed by the getter 22.

[0035] After the getter structure 2 is sent into the getter chamber 12 and the main anode 3 and the cathode 4 are indium sealed, the cavity 11 is evacuated and filled with He-Ne gas through the extraction anode 5, and then the extraction anode 5 is indium sealed, thus completing the preparation of the tunable He-Ne laser.

[0036] Therefore, the present utility model simultaneously encapsulates the electrodes and the getter structure 2 by indium sealing the electrodes, avoiding the problems of long processing and manufacturing cycle and low efficiency caused by long-time polishing in the conventional method of encapsulating the getter by grooving and photo-resist.

[0037] In this embodiment, as Figure 2 shown, the cavity 11 is an elongated structure, a reflecting mirror 6 is encapsulated at one end of the laser body 1 along the extending direction of the cavity 11, an output mirror 7 is encapsulated at the other end, and both ends of the cavity 11 along its extending direction are respectively connected to the reflecting mirror 6 and the output mirror 7 through air chambers 16.

[0038] The above-described embodiments are only relatively preferred specific embodiments of the present utility model. The phrases "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments" used in this specification can all refer to one or more of the same or different embodiments according to the present disclosure. The ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should all be included within the protection scope of the present utility model.

Claims

1. A tunable He-Ne laser, comprising a laser body (1) and a getter structure (2). A cavity (11) is provided inside the laser body (1). A plurality of electrodes are encapsulated on the laser body (1). A plurality of guide holes communicating with the cavity (11) are formed on the wall surface of the cavity (11). The plurality of guide holes correspond to the plurality of electrodes one by one. It is characterized in that, At least one via hole extends away from the corresponding electrode to form a getter chamber (12) capable of accommodating a getter structure (2), and the getter structure (2) is disposed within the getter chamber (12).

2. The tunable He-Ne laser according to claim 1, wherein The getter chamber (12) extends in the radial direction of the corresponding via hole to form a stop step (17), and the stop step (17) is used to prevent the getter structure (2) from falling into the cavity (11).

3. The tunable He-Ne laser according to claim 2, wherein The getter structure (2) includes a snap ring (21) and a getter assembly, and the snap ring (21) abuts between the stop step (17) and the getter assembly.

4. The tunable He-Ne laser according to claim 3, characterized in that, The outer diameter of the getter assembly is less than or equal to the aperture diameter of the corresponding via hole, the outer diameter of the snap ring (21) is greater than the aperture diameter of the corresponding via hole and less than or equal to the aperture diameter of the getter chamber (12), and the snap ring (21) can radially contract so as to enter the getter chamber (12) from the corresponding via hole.

5. The tunable He-Ne laser according to claim 4, wherein, The getter assembly includes a tray (23) and a getter body (22), and the getter body (22) is placed in the tray (23).

6. The tunable He-Ne laser according to any one of claims 1-5, characterized in that, The plurality of electrodes include a main anode (3), a cathode (4), and an extraction anode (5), and the plurality of via holes include a main anode via hole (13) extending from the wall surface of the cavity (11) to be electrically connected to the main anode (3), a cathode via hole (14) extending from the wall surface of the cavity (11) to be electrically connected to the cathode (4), and an extraction anode via hole (15) extending from the wall surface of the cavity (11) to be electrically connected to the extraction anode (5).

7. The tunable He-Ne laser according to any one of claims 1-5, characterized in that, The cavity (11) is an elongated structure, a reflecting mirror (6) is encapsulated at one end of the laser body (1) along the extending direction of the cavity (11), an output mirror (7) is encapsulated at the other end, and both ends of the cavity (11) along its extending direction are respectively in communication with the reflecting mirror (6) and the output mirror (7) through gas chambers (16).

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