Saturable absorber based on tantalum disulfide, preparation method and laser mode locking application thereof
A saturable absorption, tantalum disulfide technology, used in lasers, laser parts, nanotechnology for materials and surface science, etc., can solve the problems of difficult modulation depth adjustment, narrow operating wavelength range, and complex manufacturing process. Achieve the effect of stable laser performance, convenient operation and simple process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0034] 1. Preparation:
[0035] (1) Add 25 mg of tantalum disulfide powder into 50 mL of ethanol / water (volume ratio 1:0.25) mixed solution, and ultrasonically strip it in a high-power (400W) ultrasonic cleaner for 10 hours to obtain a tantalum disulfide dispersion, and then disperse the The solution was centrifuged at 2000rpm for 5 minutes to remove the tantalum disulfide that was not effectively stripped off, and obtain a dispersion of tantalum disulfide nanosheets;
[0036] (2) Take 3mL of tantalum disulfide nanosheet dispersion, mix it with 2mL of 3wt% polyvinyl alcohol (PVA) solution, and then dry it at 60°C for 20h to form a tantalum disulfide / polyvinyl alcohol composite film;
[0037] (3) The tantalum disulfide / polyvinyl alcohol composite film is cut into small pieces of 2×2mm, transferred to the end face of the optical fiber jumper, and connected with another optical fiber jumper with an optical fiber sleeve to form a tantalum disulfide-based saturable absorber.
[0...
Embodiment 2
[0040] The difference from Example 1 is that: the mass of the tantalum disulfide powder described in step (1) and the volume ratio of the ethanol solution are 10mg:50mL; the volume ratio of absolute ethanol and water is 1:0.5; the power of the ultrasound is 300W, the centrifugation speed is 5000rpm; the concentration of the polyvinyl alcohol solution in step (2) is 10wt%, and the volume ratio of the tantalum disulfide nanosheet dispersion to the polyvinyl alcohol solution is 1:5.
Embodiment 3
[0042] The saturable absorber of tantalum disulfide, the pumping source of 980nm, the wavelength division multiplexer of 980 / 1064, the ytterbium doped fiber, the optical isolator, the single-mode fiber, the fiber coupler (will One beam of laser light will be divided into two beams of laser light, and the power ratio of the two beams of light is 90:10, that is, 10% of the output, 90% continues to circulate in the optical path), and the polarization controller makes a mode-locked fiber laser with a ring cavity structure. The annular cavity is 21m long.
[0043] figure 2 For example 3 based on TaS 2 Schematic diagram of the structure of a ring-cavity mode-locked fiber laser with a saturable absorber. Among them, 1 is the pump source, 2 is the wavelength division multiplexer, 3 is the ytterbium-doped fiber, 4 is the optical isolator, 5 is the single-mode fiber, 6 is the fiber coupler, 7 is the polarization controller, 8 is TaS 2 saturable absorber. Depend on figure 2It can ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| frequency | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More