Kilowatt-level optical fiber cladding power stripper employing micro-channel water cooling

Abstract

The invention discloses a kilowatt-level optical fiber cladding power stripper employing micro-channel water cooling, and the stripper comprises a heat sink. The heat sink comprises a housing and a lining part disposed in the housing. The housing is provided with a cooling water inlet and a cooling water outlet. The outer wall of the lining part is provided with a spiral groove, and two ends of the spiral groove are respectively communicated with the cooling water inlet and the cooling water outlet. The lining part is provided with a central through hole which is used for the passing of an optical fiber. The stripper employs a mode of micro-channel water cooling for heat dissipation. During the stripping of cladding optical power, the stripper can improve the temperature performance and characteristics of cladding optical power. Compared with a conventional optical fiber cladding power stripper, the stripper can improve the uniformity of heat dissipation, is higher in withstood stripped optical power, meets the requirements of 1000W stripped optical power, is simple in structure, is low in manufacture cost, and is suitable for batch production.

Description

technical field [0001] The invention relates to an optical fiber cladding power stripper, in particular to a kilowatt-level optical fiber cladding power stripper adopting microchannel water cooling. Background technique [0002] Double-clad fiber laser is a representative of the development of new fiber laser, and fiber cladding power stripper is one of the important devices. [0003] The fiber cladding power stripper (Cladding Power Stripper, referred to as CPS) has unique optical properties. It is used to remove the cladding residual pump light in the double cladding fiber laser / fiber amplifier, and it is transmitted from the core to the inner cladding. The ASE (light source module, which is an amplified spontaneous emission light source specially designed for optical fiber sensing and optical device testing) and signal light mode is an ideal device. The optical fiber cladding power stripper can absorb the light transmitted in the inner cladding part of the double-clad fi...

AI Technical Summary

Problems solved by technology

[0007] The first type, the heat converted by stripping light is absorbed by the metal shell of the CPS device and then transferred to the cold plate, and then the heat is taken away by the cold plate, which is an indirect heat dissipation, which is limited by the thermal conductivity of the metal shell, the heat dissipation performance of the cold plate, Whether the CPS device is in good contact with the cold plate, etc., the heat dissipation effect is poor (<300W peeling power); in addition, during the installation process, it is required to apply pressure through the center line of the CPS device so that the pressure is evenly distributed in the entire contact area, and the CPS device and the cold plate are installed The flatness and smoothness of the contact surface are required to be high, so that the CPS device and the cold plate are in close contact, the processing cost is high, and the installation process is cumbersome

[0008] The second type, because the flow channel heat transfer area volume ratio is small, the convective heat transfer coefficient is low, resulting in low heat transfer performance (<500W peeling power); the sealing gasket is aged after a period of laser irradiation, resulting in a decline in sealing performance or even Ineffective; the cooling water pipeline is connected to the side of the device, which is messy and unsightly

With the increase of the output power of the fiber laser, the power of CPS stripping is further increased (up to kilowatt level), and the heat flux generated is sharply increased. The traditional method can no longer dissipate heat in a timely and effective manner. Therefore, a new heat dissipation method must be adopted. Solving Thermal Effects of High Power Lasers

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