Raman fiber laser based on graphene oxide passive mode-locking

A Raman fiber and passive mode-locking technology, applied in the field of laser technology and nonlinear optics, can solve the problems of low graphene efficiency and small graphene sheet area, and achieve the effects of low cost, flexible wavelength, and enhanced flexibility

Inactive Publication Date: 2013-06-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficiency of preparing graphene by this method is very low and the area of ​​the exfoliated graphene flakes is very smal

Method used

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  • Raman fiber laser based on graphene oxide passive mode-locking
  • Raman fiber laser based on graphene oxide passive mode-locking
  • Raman fiber laser based on graphene oxide passive mode-locking

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Experimental program
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Embodiment 1

[0034] figure 1 It is a structural schematic diagram of Embodiment 1 of the Raman fiber laser based on graphene oxide passive mode-locking of the present invention. The pump source (1) is a fiber-coupled semiconductor laser with a center wavelength of 974nm; the beam combiner (2) is used to couple the pump light into the rare-earth-doped fiber (3); the rare-earth-doped fiber (3) is Double-clad erbium-doped fiber; the wavelength division multiplexing fiber coupler (4) has an operating wavelength of 1550 / 1660nm, which is used to separate the 1550nm laser light generated by the erbium-doped fiber in the laser cavity and the 1660nm Raman signal light generated by the Raman fiber ; The Raman fiber (5) is a highly nonlinear fiber produced by YOFC, and the Raman frequency shift is 13.2THz; the circulator (6) is used to ensure the unidirectional transmission of Raman signal light in the cavity (light can only be unidirectional sequentially through the three ports of the circulator); ...

Embodiment 2

[0036] figure 2 It is a structural schematic diagram of Embodiment 2 of the Raman fiber laser based on graphene oxide passive mode-locking of the present invention. The pump source (1) is a fiber-coupled semiconductor laser with a center wavelength of 974nm; the beam combiner (2) is used to couple the pump light into the rare-earth-doped fiber (3); the rare-earth-doped fiber (3) is Double-clad ytterbium-doped fiber; the wavelength division multiplexing fiber coupler (4) has an operating wavelength of 1060 / 1120nm, which is used to separate the 1060nm laser light generated by the ytterbium-doped fiber in the laser cavity and the 1120nm Raman signal light generated by the Raman fiber ; Raman fiber (5) is a photonic crystal fiber produced by YOFC, and the Raman frequency shift is 13.2THz; the isolator (10) is used to ensure the unidirectional transmission of Raman signal light in the cavity; graphene oxide can saturate The body (7) is graphene oxide deposited on the end face of ...

Embodiment 3

[0038] image 3 It is a structural schematic diagram of Embodiment 3 of the Raman fiber laser based on graphene oxide passive mode-locking of the present invention. The pump source (1) is a fiber laser with a central wavelength of 1540nm; the wavelength division multiplexing fiber coupler (4) has an operating wavelength of 1540 / 1650nm, which is used to couple the 1540nm pump light and the 1650nm Raman signal light; the Raman fiber (5) High nonlinear optical fiber produced by YOFC, with a Raman frequency shift of 13.2THz; the circulator (6) is used to ensure the unidirectional transmission of Raman signal light in the cavity (light can only pass through the circulator sequentially in one direction three ports); the graphene oxide saturable absorber (7) is a graphene oxide film deposited on a gold-plated full mirror, which is a passive mode-locking device; the Raman signal light passes through the second wavelength division multiplexing fiber coupler (4) output.

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Abstract

A Raman fiber laser based on graphene oxide passive mode-locking belongs to the field of laser technologies and non-linear optics. The Raman fiber laser mainly comprises a pumping source (1), a combiner (2), a rare-earth doped optical fiber (3), a wavelength multiplexer optical fiber coupler (4), a Raman optical fiber (5), a circulator (6), a graphene oxide saturable absorber (7), an output coupler (8), a polarization controller (9) and the like. The Raman fiber laser adopts a dual-ring cavity structure, a single-ring cavity structure or a linear cavity structure. As the graphene oxide saturable absorber is used as a passive mode-locking device and the Raman effect of the optical fiber is combined, ultra-short pulse laser output with the characteristics of flexible wavelength, high stability and high energy is realized by the Raman fiber laser. The Raman fiber laser can be used in multiple fields such as communication sensing, bio-medical treatment and material processing.

Description

technical field [0001] The invention relates to a Raman fiber laser based on graphene oxide passive mode-locking, which belongs to the field of laser technology and nonlinear optics. Background technique [0002] Fiber lasers have the advantages of small size, light weight, high conversion efficiency, and good output beam quality, and have been developed rapidly in recent years. Fiber lasers can generally be divided into two categories according to their working medium: the first category is to use rare earth doped fiber as a gain medium to generate laser oscillation. This type of fiber laser is limited by doping elements and can only produce fixed-band laser output, and the wavelength coverage is very small (for example, the output range of ytterbium-doped fiber laser is 1010-1090nm, the output range of erbium-doped fiber laser is 1530-1600nm, The output range of thulium-doped fiber laser is 1800-2100nm). The second type is to use nonlinear effects in optical fibers (such...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/098H01S3/083
Inventor 王璞徐佳刘江
Owner BEIJING UNIV OF TECH
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