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Preparation method of saturated absorption body, saturated absorption body and mode-locked laser

A technology of saturable absorption and mode-locked lasers, which is applied in the field of passive mode-locked lasers, can solve the problems of weak single atomic layer light absorption and small modulation depth, and achieve the effect of simple preparation method and stable performance

Inactive Publication Date: 2019-07-05
THE HONG KONG POLYTECHNIC UNIV
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Problems solved by technology

[0004] As a new type of two-dimensional material, graphene has been widely confirmed as a saturable absorber to generate ultrashort pulse laser, but the modulation depth of graphene is too small (~1.3%) due to the weak light absorption of single atomic layer.

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  • Preparation method of saturated absorption body, saturated absorption body and mode-locked laser
  • Preparation method of saturated absorption body, saturated absorption body and mode-locked laser
  • Preparation method of saturated absorption body, saturated absorption body and mode-locked laser

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Embodiment Construction

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0030] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the ...

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Abstract

The present invention discloses a preparation method of a saturated absorption body, a saturated absorption body and a mode-locked laser. The preparation method of the saturated absorption body comprises the steps of: depositing a platinum element film on a quartz substrate by employing a magnetron sputtering method; putting the platinum element film into a tube furnace to perform heat treatment to obtain a platinum diselenide film, wherein in the heat treatment, high-purity selenium powder is put at an upstream low-temperature region of the tube furnace; and preparing a saturated absorption body through the platinum diselenide film. The preparation method of a saturated absorption body is simple in preparation method and can achieve commercial process.

Description

technical field [0001] The invention relates to the technical field of passive mode-locked lasers, in particular to a method for preparing a saturable absorber, a saturable absorber and a mode-locked laser. Background technique [0002] Ultrashort pulse (picosecond and femtosecond level) lasers, compared with traditional long pulse (microsecond and nanosecond level) lasers, basically do not cause any thermal damage to the surrounding materials during use. Therefore, ultrashort pulse laser has important research and application value in precision machining, surgical medical treatment, scientific research and other fields. [0003] Passive mode-locking is a method that can be used to generate ultrashort pulse laser. The basic principle is to add a saturable absorber in the optical path. After the light source passes through the saturable absorber, the loss of the wing part is greater than that of the central part, resulting in narrowing of the light pulse. This results in an ...

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Application Information

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IPC IPC(8): H01S3/098
CPCH01S3/1115H01S3/1118
Inventor 曾远康陶丽丽曾龙辉龙慧
Owner THE HONG KONG POLYTECHNIC UNIV
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