Shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system

A fiber laser and total positive dispersion technology, applied in the optical field, can solve the problems of nanosecond-level pulse phase complexity, broadening or compression, and difficult to change characteristics, so as to suppress the background noise of spontaneous radiation, improve the background noise of spontaneous radiation, and dissipate heat good effect

Active Publication Date: 2013-04-03
杭州奥创光子技术有限公司
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Problems solved by technology

In recent years, it has also been reported in the literature that long-cavity fiber lasers are used to generate nanosecond pulses, but it has been verified that the characteristics of nanosecond pulses generated by this fiber laser are difficult to change after long-distance transmission, indicating that the nanosecond pulses generated by long cavities have complex phases and cannot be used. Ordinary linear dispersion devices for stretching or compression
Therefore, its application is also limited

Method used

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  • Shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system
  • Shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system

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Embodiment Construction

[0017] see figure 1 , the new fiber laser system for generating nanosecond-level all positive dispersion dissipative mode-locked pulses provided by the present invention includes: a total positive dispersion dissipative mode-locked pulse generation subsystem A connected sequentially through an optical path, a pulse stretching subsystem B, and a Three-stage pulse amplification subsystem C with filtering characteristics.

[0018] Full positive dispersion dissipation type picosecond pulse generation subsystem A excites pulse stretching subsystem B to generate nanosecond pulses; three-stage amplification subsystem C with filtering function amplifies the generated nanosecond pulses to the required power and pulse energy.

[0019] see figure 2 , wherein the total positive dispersion dissipative mode-locked pulse generation subsystem A includes a fiber-coupled semiconductor pump light source 1, a wavelength division multiplexer 2, an ytterbium-doped fiber 3, a polarization-depende...

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Abstract

The invention relates to a shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system. The system comprises a full positive dispersion dissipative picosecond pulse generation subsystem, a pulse broadening subsystem and a three-stage amplification subsystem with a filtering function, wherein the full positive dispersion dissipative picosecond pulse generation subsystem is connected with the three-stage amplification subsystem with the filtering function through the pulse broadening subsystem. The shaped full positive dispersion dissipative nanosecond pulsed passive mode-locking fiber laser system is high in pulse energy, good in radiating effect, easy to adjust and easy and convenient to operate and can serve as a front-end system of chirped pulse amplification.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a fiber laser system, in particular to a shapeable total positive dispersion dissipative nanosecond-level mode-locked pulse fiber laser system. Background technique [0002] Nanosecond-level mode-locked fiber lasers have the advantages of compact structure, low cost, stable performance, easy adjustment, and easy coupling. They have important uses in national defense, military, and scientific research. [0003] Compared with traditional solid-state mode-locked lasers, fiber lasers have unique advantages in the field of mode-locked pulsed lasers due to their own characteristics such as dispersion, nonlinearity, and polarization state. The formation mechanism of dissipative pulses based on total positive dispersion is different from the soliton pulses formed by the balance of group velocity dispersion and self-phase modulation in the conservative state. The soliton pulse energy is limited by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
Inventor 王屹山李晓辉李成高存孝张伟赵卫牛林全朱少岚沈德元
Owner 杭州奥创光子技术有限公司
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