A high power laser system protection circuit

Abstract

The invention discloses a high-power laser system protection circuit, which is composed of a power joint 1, a low-temperature fused enameled wire 2, a PD 3, a protection resistor 4, a temperature switch 5 and a fuse 6, wherein after the low-temperature fused enameled wire 2 is used for enabling the PD and the protection resistor to be parallelly connected, connection with the temperature switch, the fuse and the power joint is then carried out according to a positive-in negative-out mode; when a laser is heated, the low-temperature fused enameled wire 2 and the temperature switch 5 are disconnected; and in the case of scattering light of the laser, the PD resistance is tiny, and the fuse is cut off. A high-power laser output laser, a high-power collimator shell heating part and a part which scatters light easily inside the device can be protected respectively; the multiple protection is safer and more reliable; the fuse can be replaced or selects a reconnection material, and the maintenance is convenient; the structure is simple and compact, integration is convenient, and the cost is lower; and the high-power laser system protection circuit can be widely applied to various high-power laser systems such as a high-power collimator, a high-power isolator, a high-power cutting head and a high-power marker.

Description

technical field [0001] The invention relates to the fields of laser processing, laser communication, laser medical treatment, military affairs, scientific research and the like, in particular to a high-power laser system protection circuit. Background technique [0002] Modern high-power laser products are widely used in optical fiber sensing, laser communication, laser processing, medical, military, scientific research and other fields. Because high-power laser products are often affected by the external environment when they are used, the temperature, humidity, and air cleanliness will be affected. It affects its own life, and this effect often forms a vicious circle under the action of high-power lasers, which makes laser products age rapidly. As a result, not only the product itself is damaged, but the high-power laser is scattered or reflected to the laser pump. Pu or other photoelectric equipment, it is very easy to cause the whole system to be burned out and paralyzed...

AI Technical Summary

Problems solved by technology

[0002] Modern high-power laser products are widely used in optical fiber sensing, laser communication, laser processing, medical, military, scientific research and other fields. Because high-power laser products are often affected by the external environment when they are used, the temperature, humidity, and air cleanliness will be affected. It affects its own life, and this effect often forms a vicious circle under the action of high-power lasers, which makes laser products age rapidly. As a result, not only the product itself is damaged, but the high-power laser is scattered or reflected to the laser pump. Pu or other photoelectric equipment, it is very easy to cause the whole system to be burned out and paralyzed

The current high-power laser products are all single-point protection for the concentrated location of the problem. In foreign countries, a single copper enameled wire is used as a protection circuit. However, the melting point of copper enameled wire is very high, and there are many factors that cause damage to high-power laser products. The size of the impact and The effects are not the same, often the protection circuit is intact, but there is a problem with the laser product or even the entire laser system

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