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Heterojunction saturable absorption mirror and preparation method therefor, and mode-locking fiber laser

A saturable absorption and heterojunction technology, applied in the field of lasers, can solve the problems of low reliability, complex manufacturing process, and high SESAM price, and achieve the effects of high reliability, efficient heat conduction, and improved thermal damage threshold.

Inactive Publication Date: 2016-08-24
SHENZHEN UNIV
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Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a heterojunction saturable absorbing mirror and its preparation method, aiming to overcome the defects of high price, complex manufacturing process and low reliability of commercial SESAM

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  • Heterojunction saturable absorption mirror and preparation method therefor, and mode-locking fiber laser
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  • Heterojunction saturable absorption mirror and preparation method therefor, and mode-locking fiber laser

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, the embodiment of the present invention provides a heterojunction saturable absorbing mirror, which includes a substrate 101 , a heterojunction thin film 102 plated on the substrate and a protective film layer 103 . In this embodiment, the substrate 101 may be copper, silicon carbide or sapphire. The heterojunction thin film 102 is composed of two layers of different materials, including any two of graphene layers, transition metal oxygenide material layers, topological insulator material layers or any two transition metal oxygenide material layers with different materials; wherein , the transition metal oxogroup compounds do not include oxides, including tungsten ditelluride, molybdenum ditelluride, hafnium disul...

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Abstract

The invention belongs to the technical field of a laser, and provides a heterojunction saturable absorption mirror. The heterojunction saturable absorption mirror comprise a substrate, a heterojunction thin film for covering the substrate, and a protection film layer positioned on the heterojunction thin film, wherein the heterojunction thin film comprises at least two saturable absorption layers, and the materials of the saturable absorption layers are different. The invention also provides a preparation method for the heterojunction saturable absorption mirror, comprising the following steps of preparing the substrate and polishing the substrate; putting the substrate in a reaction chamber, and plating the at least two saturable absorption layers on a gold film layer in sequence by adopting a CVD method to form the heterojunction thin film; and plating the protection film layer on the surface of the heterojunction thin film. The heterojunction saturable absorption mirror provided by the invention is high in damage threshold value, simple in structure, low in cost, high in reliability, simple in preparation method and suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a heterojunction saturable absorption mirror, a preparation method thereof, and a mode-locked fiber laser. Background technique [0002] The use of passive mode-locking technology is an effective way for fiber lasers to achieve ultrafast pulse output, and the key technology of passive mode-locking is the need for saturable absorption in the fiber laser resonator. At present, researchers have used a variety of saturable absorption effects to obtain passively mode-locked ultrafast pulse outputs in fiber lasers. In general, in order to overcome the instability of the fiber laser mode-locking environment, researchers usually use SESAM (semiconductor saturable absorber mirror) to achieve fiber laser mode-locked ultrafast pulse output. However, commercial SESAMs are not suitable for all-round research on the dynamics of ultrafast fiber lasers due to their high price, comple...

Claims

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Application Information

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IPC IPC(8): H01S3/098
CPCH01S3/1118
Inventor 闫培光陈浩王金章邢凤飞
Owner SHENZHEN UNIV
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