A kind of symmetrical ring laser and its manufacturing method

Abstract

The invention discloses a symmetrical ring laser which comprises a resonant cavity body, a capillary tube and four mirrors, wherein the resonant cavity body, the capillary tube and four mirrors are symmetrically arranged. A cathode located on the symmetry line is arranged on the lower end face of the resonant cavity body. Two large anodes which are located on the other symmetry line are symmetrically arranged on left and right end faces of the resonant cavity body. Each large anode is composed of a glass tube, a kovar tube, a copper tube and a titanium plate with a hole, wherein the glass tube, the kovar tube, the copper tube and the titanium plate with the hole are sequentially connected. The invention further discloses a manufacturing method of the symmetrical ring laser. According to the invention, two large anodes are composed of the same batch of titanium plates, copper tubes, kovar tubes and glass tubes, which can ensure that two anodes are completely identical in properties; twolarge anodes are all connected with a vacuum table; when vacuum evacuating is carried out, two large anodes almost share the same vacuum degree, which can facilitate degassing of the whole cavity body; and when a working gas is charged, the gas quantity of two large anodes can also be guaranteed to be the same.

Description

technical field [0001] The invention belongs to the technical field of ring lasers, and in particular relates to a symmetrical ring laser and a manufacturing method thereof. Background technique [0002] A ring laser mainly includes a resonant cavity 1, a large anode 2, a small anode 3, a cathode 4, a mirror 5 and a capillary 6, as shown in the attached figure 1 shown. Among them, the resonant cavity, four mirrors and capillary tubes form a low-loss laser resonant cavity of He-Ne gas, which maintains stable forward and reverse wave oscillations in the cavity. The large anode, small anode and cathode are excited by a high-voltage DC power supply to perform vacuum gas discharge to form a discharge channel. [0003] During the discharge process of the ring laser after filling the working gas, there is an effect that causes the activation gas to flow, usually called the Langmuir flow effect, which will cause considerable zero drift. The Langmuir flow effect refers to the sum ...

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Problems solved by technology

Due to the different manufacturing processes of large and small anodes, it is difficult to ensure the same discharge surface state

In addition, since the large anode is used as the filling and exhaust port, the vacuum degree at the large and small anodes when vacuuming and the gas volume during discharge after inflation will be different.

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