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2.1 [mu]m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser

A fiber laser and single-pulse technology, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as easy loss of locks, single-pulse difficult self-starting, etc., and achieve compact and stable adjustment flexibility and long-term stable work ability, the effect of inhibiting multi-pulse start-up

Active Publication Date: 2021-10-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing 9-character cavity mode-locked fiber laser in the 2 μm band is easily lost due to multi-pulse collision, and the single pulse is difficult to self-start, and provides a 2.1 μm band single-pulse self-starting polarization maintaining 9 Cavity mode-locked holmium-doped fiber laser

Method used

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  • 2.1 [mu]m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser
  • 2.1 [mu]m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser
  • 2.1 [mu]m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser

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specific Embodiment approach 1

[0028] Specific implementation mode one: the following combination figure 1 , 7 And 8 illustrates that the present embodiment is a 2.1 μm band single-pulse self-starting polarization-maintaining 9-character cavity mode-locked holmium-doped fiber laser, which includes a pump source 1, a 2×2 wavelength division multiplexing and output coupler 2, a gain Optical fiber 3, dispersion compensating optical fiber 4, polarization maintaining dual-fiber collimator 5, non-reciprocal phase shifter, polarization beam splitter 9 and planar end mirror 10;

[0029] The pump source 1, the 2×2 wavelength division multiplexing and output coupler 2, the gain fiber 3, the dispersion compensation fiber 4 and the polarization-maintaining dual-fiber collimator 5 constitute a fully polarization-maintaining nonlinear amplifying fiber loop;

[0030] Described non-reciprocal phase shifter, polarizing beam splitter 9 and planar end mirror 10 constitute space linear interference arm; Described non-reciprocal...

specific Embodiment approach 2

[0050] Embodiment 2: This embodiment differs from Embodiment 1 in that: the optical fiber components in the fully polarization-maintaining nonlinear amplifying fiber loop are made based on polarization-maintaining optical fiber, and are limited to work on the slow axis. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0051] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pump source 1 is a 5W single-mode fiber laser with a center wavelength of 1150 nm, 1940 nm or 1950 nm, or a center wavelength of 1150 nm, 5W single-mode fiber-coupled diode laser at 1940nm or 1950nm. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a 2.1 [mu]m waveband single-pulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser, and belongs to the technical field of ultrafast fiber lasers. The problem that multiple pulses of an existing 2-micrometer-waveband 9-shaped cavity mode-locked fiber laser collide, so that lock losing is likely to happen, and self-starting of a single pulse is difficult is solved. A 2.1 [mu]m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser comprises a pumping source, a 2 * 2 wavelength division multiplexing and output coupler, a gain fiber, a dispersion compensation fiber, a polarization-maintaining double-fiber collimator, a nonreciprocal phase shifter, a polarization beam splitter and a plane end mirror. The scheme is used for the 2.1 [mu] m waveband monopulse self-starting polarization-maintaining 9-shaped cavity mode-locked holmium-doped fiber laser.

Description

technical field [0001] The invention belongs to the technical field of ultrafast fiber lasers. Background technique [0002] Fiber ultrafast lasers in the 2.1 μm band, which are located in the transparent window of the atmosphere and the fingerprint spectral region of various molecules, have the characteristics of good beam quality, narrow pulse width, wide spectral bandwidth, small mass and volume, and good stability in attosecond science and precision materials. It has unique advantages in a wide range of application fields such as processing, clinical medicine, precision measurement and national defense security. Combining Ho:YAG chirped pulse amplification technology and ZnGP 2 Nonlinear frequency conversion technology can efficiently obtain high-energy mid-infrared femtosecond optical frequency combs. The traditional mainstream technical approaches to directly obtain 2.1μm fiber ultrafast pulses mainly include holmium-doped fiber passive mode-locked lasers and thulium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
CPCH01S3/06712H01S3/06716H01S3/06725H01S3/06754H01S3/06791H01S3/1112
Inventor 姚宝权杨超华笑笑
Owner HARBIN INST OF TECH
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