A fiber microsphere cavity mode-locked laser based on graphene channel structure

A graphene channel, mode-locked laser technology, applied in the fields of information and science, can solve the problem that the mode-locked laser cannot take into account the simple structure and low cost, and achieves the effect of simple structure and low cost

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In view of the above-mentioned problems or deficiencies, in order to solve the problems that the existing mode-locked lasers cannot take into account the problems of simple structure, low cost, wide range of adjustment and stability; the present invention provides a fiber microsphere cavity mode-locked based on graphene channel structure Laser, through the integration of gold-graphene-gold heterostructure in the system of fiber microsphere mode-locked laser, under the dynamic control of external voltage, stable ultrashort pulse output with repetition frequency and wide range modulation can be realized

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  • A fiber microsphere cavity mode-locked laser based on graphene channel structure
  • A fiber microsphere cavity mode-locked laser based on graphene channel structure
  • A fiber microsphere cavity mode-locked laser based on graphene channel structure

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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] A fiber microsphere cavity mode-locked laser based on a graphene channel structure is composed of a micro-nano fiber and erbium-doped silica microspheres on the surface. The micro-nano optical fiber is made by optical fiber fusion tapered equipment, with a length of 3 cm and a diameter of 1 micron, which realizes efficient coupling with the microsphere cavity; ordinary single-mode optical fiber passes through the optical fiber fusion splicer with a discharge intensity of 200 mA. The discharge time is 5 seconds and the arc discharge is performed 4 times, and then the mixed solution of erbium chloride-silicon dioxide with a concentration of 1019 / cm3 is configured, and UV glue is added so that the bait ions can be coated on the surface of the microspheres, and finally passed through the hydrogen-oxygen flame The degreasing process removes ...

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Abstract

The invention belongs to the field of information and science technology, and in particular relates to a fiber microsphere cavity mode-locking laser based on a graphene channel structure, comprising surface erbium-doped microspheres, multi-layer graphene and micro-nano optical fibers. In the present invention, two gold electrodes are arranged on the surface of erbium-doped microspheres, and the multilayer graphene is attached between the two gold electrodes on the sphere to form a heterostructure of gold-graphene-gold; The optical fiber with surface erbium-doped microspheres is perpendicularly attached to the centerline of the spherical surface between the two gold electrodes of the surface erbium-doped microspheres, so as to realize the optical coupling of the microsphere cavity with the surface erbium-doped microspheres. The invention realizes that the mode-locked laser has the characteristics of simple structure, low cost, wide-range tunability and stability; its single longitudinal mode line width is 1 kHz, and the threshold is 20 microwatts; the repetition frequency of the output laser ranges from 100 GHz to 1 THz. Adjustable.

Description

technical field [0001] The invention belongs to the field of information and science technology, and in particular relates to a fiber microsphere cavity mode-locked laser based on a graphene channel structure. Background technique [0002] Because of its ultra-short pulse and ultra-high peak power, mode-locked lasers are widely used in laser rapid prototyping, laser spectroscopy, nonlinear optics, condensed matter physics, precision drilling, material processing, micromachining of optical crystals, etc. . In a free-running laser, many laser pulses with different modes or frequencies exist at the same time, and only when these laser modes are phase-locked with each other, can laser ultrashort pulses or mode-locked pulses be generated. There are many ways to achieve mode locking, but they can generally be divided into two categories: active mode locking and passive mode locking. [0003] At present, active mode-locked lasers periodically change the gain or loss of the laser ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/08H01S3/067H01S3/098
CPCH01S3/06716H01S3/08013H01S3/1118
Inventor 谭腾袁中野姚佰承吴宇饶云江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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