A pump coupler with automatic switching cooling mode

Abstract

The invention discloses a pump coupler capable of automatically switching a cooling mode. A pump optical fiber is connected to a main optical fiber; a package housing is arranged at an access point of the pump optical fiber and the main optical fiber and comprises a cooling fin; the cooling fin coats the outer wall of a heat-conducting copper pipe; a water-cooling pipe is arranged in the cooling fin; a water pipe is arranged in the water-cooling pipe in a penetrating manner; a light-guide glass layer is arranged on the inner wall of the heat-conducting copper pipe; the access point is located in a hollow cavity of the heat-conducting copper pipe; an optical cement layer is arranged between the light-guide glass layer and the main optical fiber at a port of the heat-conducting copper pipe; a temperature sensor is embedded into the heat-conducting copper pipe and is connected with a temperature controller; and the cooling mode is automatically switched according to the temperature detected by the temperature sensor. The pump coupler capable of automatically switching the cooling mode disclosed by the invention is low in manufacturing difficulty, low in production cost and relatively flexible in cooling mode, and can meet the condition that an optical fiber laser stably works for a long period of time when different power is output.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a pump coupler for automatically switching heat dissipation modes. Background technique [0002] Fiber lasers have been widely concerned by researchers from various countries due to their significant advantages such as good beam quality, high conversion efficiency, low pumping threshold, good heat dissipation performance, small size and light weight, and have achieved rapid development in recent years. In particular, high-power fiber lasers have become the representative of the third-generation laser technology due to their excellent beam quality, ultra-high stability, easy use and real maintenance-free, and are widely used in automobiles, aircraft, Shipbuilding and other fields, such as skin cutting, steel plate welding, and parts repairing. The pump coupler is the key passive optical device of the fiber laser. It couples the pump light generated by the multi-path semiconductor ...

AI Technical Summary

Problems solved by technology

[0003] Due to the important position of the pump coupler in the fiber laser, the development of the pump coupler has become a research hotspot for researchers in the field of high-power fiber lasers all over the world in recent years, and there have been mature pump couplers and high-power For fiber laser products, IPG has reported 2kW, 4kW and 10kW fiber lasers, and its disclosed couplers can only be used for IPG’s specific fiber lasers. Due to the technical parameters of pump couplers suitable for high-power fiber lasers Both are very high, which requires high precision of the production process, high difficulty in production, and high production cost;

[0004] At present, domestic mature products are still rare, and most of them rely on imports. They need to import a complete set of fiber lasers. At the same time, the existing pump coupler is equipped with a metal shell in the fiber coupling area. Leakage will easily cause the temperature of the pump coupler to rise. When the temperature rises to a certain level, it will easily cause damage to the pump source and cannot guarantee long-term constant temperature work; the existing pump coupler can only be used for a single high-power Fiber laser or low-power fiber laser, because the heat dissipation of the pump coupler adopts the heat sink installed on the fiber laser to uniformly dissipate heat, the pump coupler itself cannot adjust the heat dissipation according to the temperature, so the existing pump Pu couplers are not suitable for long-term continuous work of fiber lasers with different powers

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