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Fiber laser apparatus

A fiber laser and laser technology, applied in the direction of laser devices, lasers, laser components, etc., can solve the problems of deviation during the rising period of the laser, and achieve the effect of short rising period and suppression of deviation

Active Publication Date: 2012-11-21
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the fiber laser device described in the above-mentioned Patent Document 1, although the rising period of the laser light is short, there is variation in the rising period of the laser light, and there is room for improvement.

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no. 1 Embodiment approach ）

[0037] figure 1 It is a diagram showing the fiber laser device according to the first embodiment of the present invention.

[0038] Such as figure 1 As shown, the fiber laser device 100 is mainly composed of: a seed laser light source 10 that outputs a seed laser with a wavelength of λ1; an excitation light source 20 that outputs excitation light; an optical fiber 30 for amplification that inputs excitation light and laser light; The optical coupler 40 of the excitation light and the seed laser light; the output unit 50 outputting the light output by the optical fiber 30 for amplification; the control unit 60 controlling the seed laser light source 10 and the excitation light source 20; the output command unit 65, which is input to the control unit 60 an output command to cause the output section 50 to output laser light; and a memory 67 that stores the intensity of the excitation light output from the excitation light source 20 according to the intensity of the laser light o...

no. 2 Embodiment approach ）

[0084] Next, refer to Figure 5 A second embodiment of the present invention will be described in detail. However, the same or equivalent components as those in the first embodiment are assigned the same reference numerals, and overlapping descriptions are omitted. Figure 5 It is a figure which shows the fiber laser apparatus concerning 2nd Embodiment of this invention.

[0085] Such as Figure 5 As shown, the fiber laser device 110 is equipped with: a wavelength converter 71 provided between the amplifying optical fiber 30 and the output unit 50 to receive light output from the amplifying optical fiber 30; Among them, the wavelength selection filter 73 to which the light output from the wavelength converter 71 is input differs from the first embodiment.

[0086] The wavelength converter 71 is composed of an optical fiber that causes stimulated Raman scattering. The wavelength converter 71 converts the incident light into light with a longer wavelength and outputs it when...

no. 3 Embodiment approach ）

[0100] Next, refer to Figure 6 A third embodiment of the present invention will be described in detail. However, the same reference numerals are assigned to the same or equivalent components as those in the second embodiment, and overlapping descriptions will be omitted. This embodiment is a fiber laser device using the fiber laser device 110 described in the second embodiment.

[0101] Figure 6 It is a timing chart showing the operation of the fiber laser device 110 according to the third embodiment of the present invention. The fiber laser device 110 of the present embodiment outputs the preliminary excitation light from the excitation light source 20 in the pre-excitation state, and outputs weak seed laser light from the seed laser light source 10. In this point, it is different from the fiber laser device 110 of the second embodiment. different.

[0102] Specifically, as Figure 5 As shown, at time t1 ( t6 , t12 ), when an output command is input from the output com...

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Abstract

Provided is a fiber laser apparatus wherein the period of time necessary to establish laser light to be output can be reduced, and the variation of the period of time necessary to establish laser light to be output can be suppressed. A fiber laser apparatus (100) is provided with a seed laser light source (10), an excitation light source (20), an optical fiber (30) for amplification, a control unit (60), and an output command unit (65). When an output command is input to the control unit (60), the control unit (60) controls the seed laser light source (10) and the excitation light source (20) so as to establish a preparatory excitation state or an output state. In the preparatory excitation state, excitation light having an intensity is output from the excitation light source (20) for a predetermined period of time, said intensity being determined on the basis of the period of time from the end point of the output state before the output command is input to the control unit (60) to the point of time that the output command is input to the control unit (60). In the output state, laser light is output from the seed laser light source (10), and excitation light is output from the excitation light source (20), so that the laser light is output from an output unit (50).

Description

technical field [0001] The present invention relates to fiber laser devices. Background technique [0002] In recent years, fiber laser devices have been used in medical equipment such as processing machines using lasers and scalpels using lasers. A fiber laser device is a device in which laser light and excitation light generated by a laser oscillator are input to an optical fiber for amplification, and the amplified laser light is output from an output unit. [0003] In such a fiber laser device, a certain period of time is required from when the fiber laser device starts outputting laser light until the intensity of the laser light stabilizes. In other words, it takes a certain period of time for the laser to rise. [0004] The shorter the rising period of the laser light is, the better the working efficiency is. Patent Document 1 below describes a fiber laser device in which such a period until the intensity of laser light becomes stable is shortened. [0005] For th...

Claims

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Application Information

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IPC IPC(8): H01S3/06G02F1/35H01S3/0933H01S3/23
CPCH01S3/10015H01S3/2375G02F2201/307H01S3/06754H01S3/302G02F1/33H01S3/10092G02F2201/04G02F1/3526G02F1/37H01S3/1022H01S3/0078H01S3/0675H01S3/1068H01S3/10069H01S3/094076H01S3/0092H01S3/10046H01S3/1001
Inventor 大庭康弘中居道弘
Owner THE FUJIKURA CABLE WORKS LTD