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All-fiber structural laser system capable of generating high-energy wave-free split rectangular pulse

A rectangular pulse and laser system technology, applied to the structure/shape of the active medium, lasers, laser parts, etc., can solve the problem of difficult to achieve high-energy rectangular light pulse output, and achieve simple structure, easy adjustment, and good beam quality. Effect

Inactive Publication Date: 2011-04-06
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In order to solve the shortcoming that it is difficult to realize high-energy rectangular optical pulse output in existing fiber lasers, the present invention provides a fiber laser system that can generate high-energy rectangular pulses without wave splitting, so that it can be used in optical communication, optical sensing, optical detection, etc. widely used in

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  • All-fiber structural laser system capable of generating high-energy wave-free split rectangular pulse
  • All-fiber structural laser system capable of generating high-energy wave-free split rectangular pulse
  • All-fiber structural laser system capable of generating high-energy wave-free split rectangular pulse

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Embodiment Construction

[0033] see figure 1 , the novel fiber laser system that the present invention is used to produce high-energy pulses without wave splitting includes: comprising a forward pumping light source 1, a first wavelength division multiplexer 2, and an erbium-doped gain fiber 3 connected sequentially through a single-mode optical fiber 10 , a second wavelength division multiplexer 4 , a backward pumping light source 5 , an output coupler 6 , a first polarization controller 7 , a polarization-dependent isolator 8 , and a second polarization controller 9 . A polarization-dependent isolator is connected to two polarization controllers through a single-mode fiber to form an equivalent saturable absorber. Both the forward pumping light source 1 and the backward pumping light source 5 are single-mode semiconductor lasers with a central wavelength of 980 nm, and the output power is adjustable from 0 to 500 mW. The wavelength division range of WDM 2 and 4 is 980nm / 1550nm. The type of erbium-...

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Abstract

The invention discloses an all-fiber structural laser system capable of generating high-energy wave-free split rectangular pulse, which aims to solve the technical problems that the current erbium-doped fiber laser has low pulse energy and poor stability and is difficult to realize rectangular pulse output. The all-fiber structural laser system comprises two wavelength division multiplexers, an erbium-doped fiber, a first polarization controller, a polarization dependent isolator, a second polarization controller and an output coupler connected in turn through an intra-cavity single mode fiber, wherein the input ends of the two wavelength division multiplexers are provided with pumping light sources. The length of the erbium-doped fiber is 10 to 20 meters, the total length of the single mode fiber is 5 to 10 meters, and the whole intra-cavity net dispersion is kept in a large positive value. The all-fiber structural laser system has the advantages of simple structure, low price, good stability and the like on application; and compared with a solid laser for generating high-energy rectangular pulse, the all-fiber structural laser system has the advantages of high pumping efficiency, adjustment convenience, good pulse quality and the like, and is easy for fiber coupling.

Description

technical field [0001] The invention relates to an optical fiber laser system, in particular to a novel all-fiber structured laser system capable of generating high-energy wave-splitting rectangular pulses. Background technique [0002] Fiber laser has many advantages such as simple structure, low cost, convenient adjustment, stable performance, and easy coupling. It has been deeply researched and widely used in the fields of optical communication, optical micro-manipulation, and medical treatment. In fiber lasers, ultrashort pulse output can be achieved by mode-locking technology. At present, relatively mature mode-locking devices mainly include nonlinear deflection technology (Nonlinear polarization rotation technique), semiconductor saturable absorber mirror, carbon nanotube (carbon nanotube) and so on. [0003] By artificially designing the dispersion distribution characteristics of the intracavity fiber, the mode-locked fiber laser can generate conventional femtosecond...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
Inventor 刘雪明毛东
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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