Revealing the reason behind jet formation at the tip of laser optical fiber

Revealing the Reason Behind Jet Formation at the Tip of Laser Optical Fiber
The observation of water jets in experiments and the schematics of the jet formation mechanism. Credit: Junnosuke Okajima, Tohoku University

When an optical fiber is immersed in liquid, a high-temperature, high-speed jet is discharged. Researchers expect this to be applied to medical treatment in the future. Now, a research team from Russia and Japan has explored this phenomenon further and revealed the reasons behind the jet formation.


Lasers using a thin optical fiber and combined with an endoscope and catheter can be easily transported into deep areas of the body or inside blood vessels. Traditionally, affected areas or lesions are removed by generating heat inside the tissue through laser absorption—a process known as the photothermal effect.

Yet, hydrodynamical phenomena, such as microbubble formation or high-speed jet generation from the optical fiber, show immense medical promise.

The process of jet formation happens when the laser is irradiated to the water, causing

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Revealing the reason behind jet formation at the tip of laser optical fiber — ScienceDaily

When an optical fiber is immersed in liquid, a high temperature, high speed jet is discharged. Researchers expect this to be applied to medical treatment in the future. Now, a research team from Russia and Japan has explored this phenomenon further and revealed the reasons behind the jet formation.

Lasers using a thin optical fiber and combined with an endoscope and catheter can be easily transported into deep areas of the body or inside blood vessels. Traditionally, affected areas or lesions are removed by generating heat inside the tissue through laser absorption — a process known as the photothermal effect.

Yet, hydrodynamical phenomena, such as microbubble formation or high-speed jet generation from the optical fiber, show immense medical promise.

The process of jet formation happens when the laser is irradiated to the water, causing the water to boil and a vapor bubble to form at the tip of the optical

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Tech security tip: How to delete private data for good

Moving a file to the trash on your PC or Mac gets rid of it for good, right? Not so fast.

These files can be seen by others later, and they could be slowing down your machine. Tap or click for my favorite tricks to speed up an older computer.

The contents of your PC’s Recycle Bin or Mac’s Trash Can are only cleared out when you empty them. Until then, there’s a treasure trove of files for someone to snoop through. Worried someone is keeping track of what you do on your computer? Tap or click here for ways to do your own digital sleuthing.

If you haven’t correctly shredded private documents, they can still be found later on down the road — even if you clear your trash can. All it takes is a little know-how to

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