Editing Mode locking (section)

==Applications==

* Nuclear fusion ([[inertial confinement fusion]]).
* Nonlinear optics, such as [[second-harmonic generation]], [[parametric down-conversion]], [[optical parametric oscillator]]s, and generation of [[terahertz radiation]].
* Optical data storage uses lasers, and the emerging technology of [[3D optical data storage]] generally relies on nonlinear photochemistry. For this reason, many examples use mode-locked lasers, since they can offer a very high repetition rate of ultrashort pulses.
* Femtosecond laser nanomachining – the short pulses can be used to nanomachine in many types of materials. 
* An example of pico- and femtosecond micromachining is drilling the silicon jet surface of [[inkjet printer]]s.
* [[Two-photon microscopy]].
* Corneal surgery (see [[refractive surgery]]). Femtosecond lasers can be used to create bubbles in the [[cornea]]. A line of bubbles can be used to create a cut in the cornea, replacing the [[microkeratome]], such as for the creation of a flap in [[LASIK]] surgery (this is sometimes referred to as Intralasik or all-laser surgery). Bubbles can also be created in multiple layers so that a piece of corneal tissue between these layers can be removed (a procedure known as [[small incision lenticule extraction]]).
* A laser technique has been developed that renders the surface of metals deep black. A femtosecond laser pulse deforms the surface of the metal, forming [[nanostructure]]s. The immensely increased surface area can absorb virtually all the light that falls on it, thus rendering it deep black. This is one type of [[Black gold (jewelry)#Black gold|black gold]].<ref>{{cite web
|title=Ultra-Intense Laser Blast Creates True 'Black Metal'
|url=http://www.rochester.edu/news/show.php?id=2701
|access-date=2007-11-21
}}</ref><ref>{{Cite journal |last1=Vorobyev |first1=A. Y. |last2=Guo |first2=Chunlei |date=28 January 2008 |title=Colorizing metals with femtosecond laser pulses |url=https://pubs.aip.org/aip/apl/article-abstract/92/4/041914/335591/Colorizing-metals-with-femtosecond-laser-pulses?redirectedFrom=fulltext |journal=[[Applied Physics Letters]] |volume=92 |issue=4 |pages=041914 |doi=10.1063/1.2834902|bibcode=2008ApPhL..92d1914V |url-access=subscription }}</ref>
* Photonic sampling, using the high accuracy of lasers over electronic clocks to decrease the sampling error in electronic ADCs.