https://en.formulasearchengine.com/index.php?action=history&feed=atom&title=All-electric_range 2026-05-24T23:39:58Z Revision history for this page on the wiki MediaWiki 1.43.0-wmf.28 https://en.formulasearchengine.com/index.php?title=All-electric_range&diff=16825&oldid=prev 2013-04-13T18:13:21Z

<p>replace image with formula</p> <p><b>New page</b></p><div>{{Other uses|FASOR (disambiguation)}}<br /> {{unreferenced|date=December 2008}}<br /> [[Image:Starfire Optical Range - sodium laser.jpg|thumb|200px|A 50W FASOR used at the [[Starfire Optical Range]].]]<br /> <br /> In [[physics]], a &#039;&#039;&#039;FASOR&#039;&#039;&#039; is an acronym for &#039;&#039;&#039;Frequency Addition Source of Optical Radiation&#039;&#039;&#039;. It is a device similar to a [[laser]] where the emitted light is produced in a [[nonlinear optics|sum-frequency generation process]] from two laser sources that operate at different wavelengths. The &#039;&#039;frequencies&#039;&#039; of the sources add directly to a summed frequency. Thus, if the source wavelengths are &lt;math&gt;\lambda_1&lt;/math&gt; and &lt;math&gt;\lambda_2&lt;/math&gt;, the resulting wavelength is<br /> :&lt;math&gt; \lambda = \left(\frac{1}{\lambda_1} + \frac{1}{\lambda_2} \right)^{-1}.&lt;/math&gt;<br /> <br /> ==Applications==<br /> The FASOR in the image is used for [[laser guide star]] experiments. It is tuned to the D2A [[hyperfine]] component of the [[Fraunhofer lines|sodium D line]] and used to excite [[sodium]] atoms in the [[sodium layer|mesospheric upper atmosphere]]. The FASOR consists of two single-frequency injection-locked [[Nd:YAG]] lasers close to 1064 and 1320&amp;nbsp;nm that are both [[resonant]] in a cavity containing a [[lithium triborate]] (LBO) crystal, which sums the frequencies yielding 589.158&amp;nbsp;nm light.<br /> <br /> {{DEFAULTSORT:Frequency Addition Source Of Optical Radiation}}<br /> [[Category:Laser science]]</div>

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