Editing Blue (section)

===Lasers===
{{main|Blue laser}}

[[Laser]]s emitting in the blue region of the spectrum became widely available to the public in 2010 with the release of inexpensive high-powered 445–447&nbsp;nm [[laser diode]] technology.<ref name="laserglow">{{Cite web |title=Laserglow – Blue, Red, Yellow, Green Lasers |url=http://www.laserglow.com/GPO |url-status=live |archive-url=https://web.archive.org/web/20110916051206/http://www.laserglow.com/GPO |archive-date=16 September 2011 |access-date=20 September 2011 |website=Laserglow.com}}</ref> Previously the blue wavelengths were accessible only through [[DPSS]] which are comparatively expensive and inefficient, but still widely used by scientists for applications including [[optogenetics]], [[Raman spectroscopy]], and [[particle image velocimetry]], due to their superior beam quality.<ref name="laserglow2">{{Cite web |title=Laserglow – Optogenetics |url=http://www.laserglow.com/page/optogenetics |url-status=live |archive-url=https://web.archive.org/web/20110915023159/http://www.laserglow.com/page/optogenetics |archive-date=15 September 2011 |access-date=20 September 2011 |website=Laserglow.com}}</ref> Blue [[gas laser]]s are also still commonly used for [[holography]], [[DNA sequencing]], [[optical pumping]], among other scientific and medical applications.