Ultrafast fiber laser

A fiber laser, ultra-fast technology, applied in the laser field, can solve the problem of laser loss of mode-locking state, etc., to achieve the effect of maintaining consistency and reducing temperature dependence

Inactive Publication Date: 2020-06-26
青岛自贸激光科技有限公司
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  • Claims
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Problems solved by technology

However, this mode locking method is very sensitive to changes in the external environment, such as temperature changes and fiber stress changes can cause the laser to lose the mode locking state

Method used

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  • Ultrafast fiber laser

Examples

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Embodiment

[0025] Example: such as figure 1 As shown, an ultrafast fiber laser includes a mode-locked optical chip 1 , a fiber management module 2 , a polarization-maintaining extension module 3 , and a pump module 4 .

[0026] The mode-locked optical chip is packaged with optical devices such as a wavelength division multiplexer (WDM), a polarization-dependent isolation wall (PDI), and a polarization controller, and is connected to the outside through a pigtail. The angle and position required by the design are fixed inside the optical chip, and the packaging process has been improved through a large number of environmental tests, so that the mode-locked optical chip has extremely high consistency and environmental reliability;

[0027] The optical fiber management module has gain optical fiber and nonlinear optical fiber inside, and the optical fiber is connected by fusion splicing. Through the fully automatic fiber winding process, the optical fiber is coiled in the same plane without...

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Abstract

The invention belongs to the technical field of laser, and particularly discloses an ultrafast fiber laser which comprises a mode-locked optical chip, an optical fiber management module, a polarization-maintaining extension module and a pumping module, wherein the mode-locked optical chip, the optical fiber management module and the polarization-maintaining extension module form a laser resonant cavity, the mode-locked optical chip comprises an optical device required for realizing the passive mode locking in the laser resonant cavity, and the optical fiber management module comprises a gain optical fiber and a nonlinear optical fiber. The module consistency problem of the mode-locked optical chip and the optical fiber management module is solved through the packaging technology, meanwhile, the temperature correlation is reduced, the defect that NPR mode locking is sensitive to external environment changes is overcome, the ultrafast optical pulses with high pulse energy and narrow pulse width are obtained, the service life is long, the output index is stable, and the working environment temperature range is large. And meanwhile, the polarization-maintaining extension module is added, so that the repetition frequency of the laser can be adjusted by controlling the length of the polarization-maintaining optical fiber under the condition of not influencing mode locking.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an ultrafast fiber laser. Background technique [0002] In recent years, fiber laser has achieved great development due to its advantages of miniaturization, high efficiency, low cost, and low dependence on the environment, and has become the mainstream direction in the field of lasers. Ultrafast (picosecond, femtosecond) fiber laser is one of the most popular frontier research topics in the field of lasers. It has a wide range of applications in the fields of ultrafast dynamics, biomedicine, high-speed optical communication, and precision micromachining. [0003] Ultrafast light pulses are achieved by mode-locking. Mode-locking technology includes active mode-locking and passive mode-locking. Active mode-locking is to add a control unit (such as an acousto-optic modulator) into the laser resonator to achieve mode-locking. This mode-locking method generally only realizes nanoseco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
CPCH01S3/067H01S3/1106H01S3/06712
Inventor 罗文清曹祥东刘觐锋
Owner 青岛自贸激光科技有限公司
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