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Low-repetition-frequency 1064nm self-mode-locking polarization-maintaining ytterbium-doped optical fiber laser

A technology of ytterbium-doped fiber and laser, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of lasers losing compactness and increasing laser structural instability, so as to avoid energy and frequency signal loss and strengthen The effect of compactness, high reliability and stability

Pending Publication Date: 2019-06-18
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

However, the method of connecting an external acousto-optic modulation device will not only introduce some loss in the amplification process of the seed source laser, but also make the laser lose the compactness of the structure and increase the instability of the laser structure

Method used

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  • Low-repetition-frequency 1064nm self-mode-locking polarization-maintaining ytterbium-doped optical fiber laser
  • Low-repetition-frequency 1064nm self-mode-locking polarization-maintaining ytterbium-doped optical fiber laser
  • Low-repetition-frequency 1064nm self-mode-locking polarization-maintaining ytterbium-doped optical fiber laser

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Embodiment 1

[0030] The internal structure design of a low repetition rate 1064nm self-mode-locked polarization-maintaining ytterbium-doped fiber laser is as follows: figure 1 As shown, the laser is composed of three parts and adopts a "figure 8" structure, namely a NALM structure, a main loop oscillator cavity and a pulse test module. The seed source uses full polarization-maintaining optical fiber components, so that the laser can still work very stably under external environmental disturbances.

[0031] like figure 2 It is a diagram of a 1064nm self-mode-locked polarization-maintaining ytterbium-doped fiber laser system invented with a low repetition rate. The NALM ring structure consists of a diode pump 1 (LD-1), a 1064nm wavelength division multiplexer 2 (WDM-1), a gain fiber 3, and a common single-mode fiber 4 (SMF). The pumping light of diode pumping 1 (LD-1) enters the wavelength division multiplexer 2 (WDM-1), that is, the signal light and the pumping light are in the same dire...

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Abstract

The invention discloses a low-repetition-frequency 1064nm self-mode-locking polarization-maintaining ytterbium-doped optical fiber laser, which comprises a NALM (Nonlinear Amplifying Loop Mirror) locking mode, an all polarization-maintaining laser oscillation cavity and a pulse testing device. The laser adopts a "8"-shaped structure, one end of the all polarization-maintaining laser oscillation cavity is connected with the NALM locking mode, and the other end of the all polarization-maintaining laser oscillation cavity is connected with the pulse testing device. The laser adopts a NALM lockingmode technology of the all polarization-maintaining structure and the long oscillation cavity which is longer than 100m, pulse output of low repetition frequency can be directly realized under a situation of high pulse energy, the pulse repetition frequency does not need to be lowered by an AOM (Acoustic-optical Modulator), and the compactness and the stability of a laser structure are enhanced.Meanwhile, in an oscillation loop, a 1064nm active gain optical fiber doped with Yb ions is used so as to be compatible with an existing mainstream ytterbium-doped optical fiber amplifier, good pulsequality output of the laser is guaranteed, and finally, 1064nm femtosecond laser output is realized.

Description

technical field [0001] The invention relates to the technical field of ultrafast lasers, in particular to a 1064nm self-mode-locked polarization-maintaining ytterbium-doped fiber laser with low repetition rate. Background technique [0002] In recent years, fiber lasers have been favored in the field of laser micro-nano processing due to their good beam quality, high energy conversion efficiency, compact structure, and low cost. Ultrafast fiber lasers using fiber doped with rare earth elements as the gain medium have the advantages of more compact structure, good stability, and high quantum conversion efficiency. Femtosecond-level fiber lasers have gradually been recognized, and the application requirements in high-precision micromachining is also becoming more widespread. Compared with traditional high-power and high-repetition-frequency fiber lasers, which can be widely used in industrial processing, low-repetition-frequency ultrashort pulse lasers are increasingly used i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/106H01S3/11
Inventor 郭亮梁纯佳欧尚明隋庆林
Owner SOUTH CHINA NORMAL UNIVERSITY
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