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Optical fiber femtosecond laser mode locking device based on semiconductor saturable absorber mirror

A saturable absorption, femtosecond laser technology, applied in the field of mode-locked devices, can solve the problems of reducing the stability of laser mode-locking, reducing the coherence and peak power of laser output femtosecond pulses, etc.

Pending Publication Date: 2020-10-30
南京南辉智能光学感控研究院有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, these sub-cavity modes become losses in the fiber femtosecond laser, which increases the mode-locking threshold of the femtosecond laser and reduces the stability of the laser during mode-locked operation; The cavity mode is incoherent, which also reduces the coherence and peak power of the laser output femtosecond pulse

Method used

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  • Optical fiber femtosecond laser mode locking device based on semiconductor saturable absorber mirror
  • Optical fiber femtosecond laser mode locking device based on semiconductor saturable absorber mirror
  • Optical fiber femtosecond laser mode locking device based on semiconductor saturable absorber mirror

Examples

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Embodiment 1

[0015] Example 1: figure 2 It is a schematic diagram of the structure of a linear cavity fiber femtosecond laser built by the present invention. The pump laser is coupled into the fiber laser through the pump fiber (8) and the wavelength division multiplexer (9). The structure of the fiber laser is a linear cavity, and the cavity at one end The mirror is a fiber Bragg grating (10), and the cavity mirror at the other end is the invention (12) based on a semiconductor insurable and absorbing mirror. The pump light passes through the gain fiber (11) in the pump laser to generate spontaneous radiation, and the The linear cavity composed of the Bragg grating (10) and the present invention (12) based on semiconductor retentive and absorbing mirrors is reflected and amplified multiple times in a linear cavity to generate laser light. Further, the laser in the cavity is converted into femtosecond laser pulses through the semiconductor insurable and absorbing mirror integrated in the ...

Embodiment 2

[0016] Example 2: image 3 It is a schematic diagram of the structure of a ring cavity fiber femtosecond laser built by the present invention. The pump laser is coupled into the fiber laser through the pump fiber (13) and the wavelength division multiplexer (14). The fiber laser structure is a ring cavity. The light passes through the gain fiber (15) in the pump laser to generate spontaneous radiation, and then through multiple operations and amplification in the cavity to form laser light; the fiber isolator (17) stipulates that the transmission of the laser light in the laser is in a single direction, which can avoid two The mutual interference of laser light in two opposite directions affects the stability of the laser; the present invention (19) based on the semiconductor insurable and absorbing mirror is integrated into the ring cavity fiber femtosecond laser through the fiber circulator (18), and the laser generated in the laser into femtosecond laser pulses. Finally, e...

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PUM

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Abstract

The invention provides an optical fiber femtosecond laser mode locking device based on a semiconductor saturable absorber mirror. The air gap between the semiconductor saturable absorber mirror in thefiber laser and the end face of the ferrule of the ferrule-type fiber connector is filled with the refractive index matching liquid, so that the problem that the operation of the laser is interfereddue to the fact that the air gap forms a sub-cavity is solved, and the mode locking stability of the fiber femtosecond laser is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of ultrafast lasers, and relates to a mode-locking device for an optical fiber femtosecond laser. Background technique [0002] Ultrashort pulse lasers with high power, high energy and high beam quality play an important role in many application fields. In particular, for laser processing of materials, the processing effects brought by different pulse widths are quite different. Generally, the narrower the pulse width of the laser pulse used for material processing, the higher the fineness of processing. In lasers that output ultrashort pulses, femtosecond (fs, 10 -15 s) The pulsed femtosecond laser is an excellent tool for ultra-fine processing of materials. In addition, in industrial applications, another requirement for ultrashort pulse laser systems for material processing is high stability, which is suitable for high-intensity continuous operations and complex production environments. From this pers...

Claims

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Application Information

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IPC IPC(8): H01S3/098H01S3/067H01S3/08H01S3/094
CPCH01S3/1115H01S3/0675H01S3/06791H01S3/08H01S3/094003
Inventor 陈伟葛士军马超群陈烨
Owner 南京南辉智能光学感控研究院有限公司
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