Dual-wavelength tunable short pulse fiber laser

A fiber laser and short-pulse technology, which is applied in the field of laser technology and nonlinear optics, can solve the problems of complex production of dual-wavelength tunable short-pulse lasers, low degree of fiberization, and small dual-wavelength intervals, etc., to achieve simple structure and stable environment The effect of good performance and large distance between two wavelengths

Active Publication Date: 2016-08-03
CHONGQING UNIV OF POSTS & TELECOMM
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  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of current dual-wavelength tunable short-pulse lasers such as complex production, instability, high cost, difficult tuning, low degree of fiberization, and small interval between two wavelengths, and provide a high-degree of fiberization, Synchronous short-pulse fiber laser with simple fabrication, relatively low cost, stable output, easy tuning, and large dual-wavelength interval

Method used

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  • Dual-wavelength tunable short pulse fiber laser

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Embodiment 2

[0030] The basic principle of a dual-wavelength tunable short-pulse fiber laser is shown in figure 2 shown. 1 and 10 in the figure are the first and second pump sources respectively, and semiconductor laser diodes with center wavelengths of 1570nm and 980nm can be selected respectively; 2 and 11 are the first and fourth wavelength division multiplexers respectively, and 1570 nm can be selected respectively. / 2000nm, 980 / 1550nm wavelength division multiplexer; 3, 12 are the first and second gain fiber, respectively, can choose thulium-doped, erbium-doped single-mode fiber; 4, 6 are the second, third wavelength division multiplexing 1550 / 2000nm wavelength division multiplexer can be selected for use; 5 is a graphene saturable absorber, and polymethyl methacrylate (PMMA) can be coated on a graphene thin layer with a copper substrate by using a spin coating method Then place it in an aqueous solution of ammonium persulfate to eliminate the copper substrate to form a PMMA / graphen...

Embodiment 3

[0033] The basic principle of a dual-wavelength tunable short-pulse fiber laser is shown in image 3 shown. 1 and 10 in the figure are the first and second pump sources respectively, and semiconductor laser diodes with center wavelengths of 1570nm and 980nm can be selected respectively; 2 and 11 are the first and fourth wavelength division multiplexers respectively, and 1570 nm can be selected respectively. / 2000nm, 980 / 1550nm wavelength division multiplexer; 3, 12 are the first and second gain fiber, respectively, can choose thulium-doped, erbium-doped single-mode fiber; 4, 6 are the second, third wavelength division multiplexing 1550 / 2000nm wavelength division multiplexer can be selected for use; 5 is a graphene saturable absorber, and polymethyl methacrylate (PMMA) can be coated on a graphene thin layer with a copper substrate by using a spin coating method Then place it in an aqueous solution of ammonium persulfate to eliminate the copper substrate to form a PMMA / graphene...

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Abstract

The invention claims to protect a dual-wavelength tunable short pulse fiber laser, mainly including pumping sources (1)(10), wavelength division multiplexers (2)(4)(6)(11), gain fiber (3)(12), a graphene saturable absorber (5), fiber couplers (7)(13), circulators (16)(17), reflection type adjustable filters (8)(14) and broadband fiber environments (9)(15) formed by 50:50 fiber couplers. The dual-wavelength tunable short pulse fiber laser provided by the invention adopts a double-ring cavity or double-linear cavity structure, the wavelength division multiplexers (4)(6) and the graphene saturable absorber (5) serve as a common branch of the double-ring cavity or double-linear cavity structure, utilizes the advantages of wide wavelength absorption range, smooth absorption, low saturation intensity and ultrafast recovery time of the graphene saturable absorber, and combined with the reflection type adjustable filters, stable output of synchronous short pulses with tunable single wavelengths and large dual-wavelength intervals of the fiber laser can be realized.

Description

technical field [0001] The invention belongs to the field of laser technology and nonlinear optics, in particular to a dual-wavelength tunable short-pulse fiber laser. Background technique [0002] As the existing dual-wavelength short-pulse solid-state lasers have defects such as complex operation and technology, bulky volume, low efficiency, and poor reliability, this greatly limits the scope of use of dual-wavelength short-pulse lasers, and is currently limited to laboratory use. The dual-wavelength short-pulse fiber laser has received widespread attention due to its low loss, high compactness, high fiber degree, high efficiency, good heat dissipation, and good compatibility with communication optical fibers. It is used in laser processing, communication sensing, and detection. Diagnosis, biomedicine, spectroscopy, military and many other fields have broad prospects. [0003] The existing synchronization methods of dual-wavelength short-pulse fiber lasers mainly include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/0941
CPCH01S3/067H01S3/0941H01S3/10
Inventor 王小发顾小辉姜秋霞张俊红彭晓玲夏青
Owner CHONGQING UNIV OF POSTS & TELECOMM
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