Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device

A technology of saturable absorption and pulsed lasers, which is applied in the field of nonlinear optics and lasers, can solve problems such as difficult coupling, low damage threshold, and limited spectral bandwidth, and achieve a wide range of operating wavelengths, adjustable operating modes, and stability high effect

Inactive Publication Date: 2014-09-10
南京诺派激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, there are a series of problems such as limited spectral bandwidth, difficult coupling, and low damage threshold.
And because the coupling mode of conventional saturable absorber devices (such as SESAM) and the laser optical path is determined, laser

Method used

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  • Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device
  • Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device
  • Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The high-density carbon nanotube array prepared by chemical vapor deposition (CVD) is drawn into a carbon nanotube film. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 5-10nm, and the film is directly deposited on several quartz optical substrates. Along the same direction, repeat the above deposition process, and deposit several quartz substrates 1 time, 5 times, 10 times, 25 times, etc., and saturable absorbing devices with different optical absorption characteristics can be prepared; several The quartz substrate is integrated on the slidable slot, and then the slidable slot is set on the sliding fixed slot to make a movable saturable absorbing device.

Embodiment 2

[0037] The CVD method (temperature 1000 o C, Monolayer graphene on copper foil prepared by mixing ethylene and hydrogen) was coated with a thin layer of polymethyl methacrylate (PMMA) as a support material. Utilize FCl 3 Chemically etch off the copper foil, and then attach the PMMA with graphene on the surface to the sapphire optical substrate, and finally use acetone to etch off the PMMA, and dry at room temperature for 2-4 hours to realize the transfer of single-layer graphene; repeat this The process can realize the transfer of different proportions and total layers of graphene and carbon nanotube films on different sapphire optical substrates.

Embodiment 3

[0039] Dissolve 5 mg of single-walled carbon nanotube (SWNTs) powder and 50 mg of sodium dodecylbenzenesulfonate (SDBS) in 10 mL of water, and disperse by ultrasonic (power 180W, temperature 8-10 o C) Treat for 120 minutes, centrifuge the obtained carbon nanotube dispersion (25000g, temperature 14 o C), treated for 120 minutes to obtain an aqueous solution of single-walled carbon nanotubes; 80 mg of graphite powder and 60 mg of sodium deoxycholate (SDC) were dissolved in 10 mL of water, and dispersed by ultrasonic (power 180W, temperature 8-10 o C) After processing for 240 minutes, centrifuge the obtained dispersion liquid containing single-layer graphene and few-layer graphene (25000g, temperature 14 oC ), treated for 60 minutes to obtain a graphene aqueous solution; PVA was dissolved in water with a mass percentage of 15%, and treated in a high-speed mixer (15000g, room temperature) for 10 minutes to form a PVA aqueous solution; the above three aqueous solutions were accord...

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PUM

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Abstract

The invention discloses an adjustable saturable absorbing device, a production method of the adjustable saturable absorbing device and an application of the adjustable saturable absorbing device in a time domain output mode adjustable optical fiber pulse laser device. Multiple types of low-dimensional nano materials are deposited or transferred onto a transparent optical substrate or an optical substrate with a reflecting rate of 0.1%-99.9% and the optical substrate is arranged inside a movable or rotatable device to form the adjustable saturable absorbing device; the adjustable saturable absorbing device is applied to the optical fiber pulse laser device to achieve a method of switchover among a continuous laser output mode, a Q-switching laser output mode, a mode locking pulse output mode and the like. The adjustable saturable absorbing device can adjust the optical parameters such as linear absorption and nonlinear absorption to achieve switchover among the continuous laser output mode, the Q-switching laser output mode, the mode locking pulse output mode and the like and accordingly to provide better pulse working states; by introducing a new degree of freedom, the adjustable saturable absorbing device also provides a mode for regulating and controlling the pulse laser output working modes; the pulse laser working modes based on the adjustable saturable absorbing device is adjustable, high in stability and power and wide in working wavelength range.

Description

technical field [0001] The invention belongs to the field of nonlinear optics and laser technology, and specifically relates to an adjustable saturable absorption device, a preparation method and an application of a fiber pulse laser based on the device. Background technique [0002] Pulse refers to a working method that occurs only once at a certain interval. A laser that operates in pulsed mode is a pulsed laser. This type of laser has high pulse energy and good cutting quality. It is a high-end product in processing laser products. In recent years, it has been widely used in optical communication systems, photoelectric sensors, biomedicine, and precision machining. There are generally two ways to realize laser pulses: mode locking and Q switching. [0003] Mode-locked lasers are a general term for lasers whose output light pulse width is on the order of picoseconds or shorter (1 picosecond = 10 -12 seconds), with the characteristics of high peak power and high time sen...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/067
Inventor 高延祥
Owner 南京诺派激光技术有限公司
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