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Random fiber laser with tunable wavelength

A fiber laser, laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of high laser threshold, lower threshold, fixed shape of Raman gain spectrum, etc., and achieve wavelength continuously tunable, The effect of increasing output power and improving slope efficiency

Inactive Publication Date: 2012-05-02
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0005] 2. The slope efficiency of the laser
[0006] 3. The shape of the Raman gain spectrum is fixed
The shape of the Raman gain spectrum in the above system is fixed. On the one hand, the threshold of the laser is higher, reaching 1.6W, so we must find a way to reduce the threshold
On the other hand, it is not conducive to further study the dynamic characteristics of this new type of random laser.

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  • Random fiber laser with tunable wavelength
  • Random fiber laser with tunable wavelength
  • Random fiber laser with tunable wavelength

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Embodiment Construction

[0030] Attached below Figure 1 to Figure 3 A detailed description of the specific implementation of the system:

[0031] The wavelength tunable random laser system in the present invention, the system diagram can be found in Figure 1 to Figure 3 , including a first pump source 1, a first seed source 2, a second seed source group 3, a first WDM4, a second WDM5, a third WDM6, a coupler 7, an optical fiber 8, a fourth WDM9, and a first reflector 10 , a second reflector 11 , a fifth WDM 12 , and an additional seed source group 13 .

[0032] exist figure 1 Among them, the first pump source 1 is connected to the first WDM4 through an optical fiber, the first WDM4 and the first seed source 2 are connected to the second WDM5 together, and the second WDM5 and the second seed source group 3 are connected to the third WDM6 together, The third WDM 6 is connected to a coupler 7 , and the coupler 7 is connected to an optical fiber 8 . The first pump source 1 of the high-power waveleng...

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Abstract

The invention discloses a random fiber laser system with tunable wavelength, belonging to the laser device field. According to the system, first pump source laser with tunable wavelength and a series of low energy seed source laser are injected into a fiber, through a series of Raman amplification effects, distributed Raman amplification light is generated in a transmission fiber, and distributedRayleigh backward diffusion light forms random laser after Raman amplification. A random laser in the invention can realize continuous tunable wavelength. In a selectable scheme, after first Raman amplification, residual energy of a first pump source or a first seed source is fed back to the fiber for reuse, and slope efficiency of a finally formed random laser is raised. The system can control aRaman gain and a shape of a Raman gain spectrum through additional seed light, reduce a threshold of the laser, and raise output power.

Description

technical field [0001] The invention relates to a system in which distributed Rayleigh scattering in an optical fiber is amplified by Raman to form laser light. In particular, it relates to the generation of tunable random fiber lasers by generating controllable distributed Raman gain. Compared with traditional fiber lasers, this system has no laser resonator and belongs to the field of new laser devices. Background technique [0002] In the literature Sergei K. Turitsyn, Sergey A. Babin, Atalla E. El-Taher, Paul Harper, Dmitriy V. Churkin, Sergey I. Kablukov, Juan Diego Ania-Castanon, Vassilis Karalekas and Evgenii V. Podivilov. Random distributed feedback A random fiber laser system is introduced in fiber laser.Nature Photon.2010, 4, 231-235. In this system, two beams of equal-power 1455nm pump light are coupled into the fiber from the midpoint of the fiber in opposite directions (the total length of the fiber is 83km. The photons transmitted in the fiber are coherently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/30
Inventor 丁迎春滕瑞新陈露露孟庆云许海军
Owner BEIJING UNIV OF CHEM TECH
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