Text this

Number:

Provider:

CAPTCHA:

 __   _      ___      _  _     ______    _____   
| || | ||   / _ \\   | \| ||  /_   _//  /  ___|| 
| '--' ||  / //\ \\  |  ' ||   -| ||-  | // __   
| .--. || |  ___  || | .  ||   _| ||_  | \\_\ || 
|_|| |_|| |_||  |_|| |_|\_||  /_____//  \____//  
`-`  `-`  `-`   `-`  `-` -`   `-----`    `---`

Please enter what you see:

Text this: Injection-seeded high-repetition-rate short-pulse micro-laser based on upconversion nanoparticles