Virtually imaged phased array

<p>A virtually imaged phased array (VIPA) is an angular <a href="/facts/Dispersion_(optics)/cUdHnYXz">dispersive</a> device that, like a <a href="/facts/Prism_(optics)/eodBFF70">prism</a> or a <a href="/facts/Diffraction_grating/TUcyt7Do">diffraction grating</a>, splits light into its <a href="/facts/Electromagnetic_spectrum/24LARvFY">spectral</a> components. The device works almost independently of <a href="/facts/Polarization_(waves)/fP33m0eD">polarization</a>. In contrast to prisms or regular diffraction gratings, the VIPA has a much higher angular dispersion but has a smaller <a href="/facts/Free_spectral_range/Aa4TRIyj">free spectral range</a>. This aspect is similar to that of an <a href="/facts/Echelle_grating/tec3DMdg">Echelle grating</a>, since it also uses high diffraction orders. To overcome this disadvantage, the VIPA can be combined with a diffraction grating. The VIPA is a compact spectral disperser with high <a href="/facts/Wavelength/kcJU0ymz">wavelength</a> resolving power.
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Virtually imaged phased array open-in-new

Virtually imaged phased array