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A new laser diode system with pigtail for both indication and monitoring

A technology of diodes and fiber lasers, applied in lasers, laser components, phonon exciters, etc., can solve problems such as damage to fiber lasers, low wavelength return loss of fiber lasers, and interference with normal operation of fiber lasers, achieving cost performance High, high-possibility, flexible-to-use effects

Active Publication Date: 2021-12-03
GW (SHANGHAI) LASER TECH CO LTD
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Problems solved by technology

The high reflective coating of the fiber laser signal wavelength also means that the return loss of the fiber laser wavelength is low, and the signal reflected back to the fiber laser at the end face of the pigtail is high. With the continuous increase of the output power of the fiber laser, the laser diode The signal reflected back from the end face of the pigtail interferes with the normal operation of the fiber laser, and the probability of even damaging the fiber laser is greatly increased

Method used

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  • A new laser diode system with pigtail for both indication and monitoring

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Embodiment Construction

[0019] see figure 1 , as shown in the figure, a new dual-purpose laser diode system with pigtails for indication and monitoring, including a visible light laser diode light source 100 for indication, a two-way beam splitter 200 for reflection filtering, A photodetector 300 for monitoring purposes and a fiber pigtail 400 for coupling visible light into the fiber laser system.

[0020] The visible light laser diode light source 100 for indication usually selects a red light diode with a waveband λ2 of 635-660nm according to the application, and the indication light emitted by it is totally reflected into the fiber pigtail 400 through the bidirectional beam splitter 200 and coupled into the fiber laser (not shown in the figure), the reflected light of the fiber pigtail 400 whose wavelength is λ1 directly passes through the two-way beam splitter 200 and reaches the photodetector 300, and the photodetector 300 detects that the fiber laser passes through the fiber pigtail 400 in rea...

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Abstract

The invention discloses a new dual-purpose laser diode system with pigtails for indication and monitoring, which is characterized in that it includes a visible light laser diode light source for indication, a two-way beam splitter for reflection filtering, A photodetector for monitoring and a fiber pigtail for coupling visible light into the fiber laser system, the indication light emitted by the visible light laser diode light source for the indication is totally reflected by the two-way beam splitter to the In the fiber pigtail and coupled into the fiber laser, the reflected light of the fiber pigtail directly passes through the two-way beam splitter to reach the photodetector, and the photodetector detects in real time that the fiber laser passes through the fiber pigtail The intensity of the reflected light. The invention can monitor the reflected light intensity of the fiber laser system in real time so as to protect the fiber laser.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a novel laser diode system with pigtails for dual purposes of indication and monitoring. Background technique [0002] With the rapid adoption of fiber lasers in various industrial applications, the demand for pigtailed laser diodes is also growing rapidly. Due to the relatively high sensitivity of red light to human eyes after being reflected by various materials, basically all indicator laser diodes with pigtails integrated into fiber lasers have a wavelength of 635-660nm. [0003] The laser diode with pigtail integrated into the fiber laser mainly has the following two issues to consider: 1. The influence of the reflected fiber laser signal on the service life of the laser diode; 2. The echo of the laser diode Loss interferes with fiber lasers. [0004] In order to avoid damage to the laser diode by the laser signal leaked or reflected from the fiber laser, in addition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/067H01S3/10015
Inventor 丁建武刘进辉沈国新方霞
Owner GW (SHANGHAI) LASER TECH CO LTD
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