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Grating free spectral range

The free spectral range of a spectrometer is the wavelength interval 8X of the incident radiation for which a one-valued relation exists between A and the position x(A) of the entrance-slit image. While for prism spectrometers the free spectral range covers the whole region of normal dispersion of the prism material, for grating spectrometers SX is determined by the diffraction order m and decreases with increasing m (Sect.4.1.3). [Pg.111]

Another approach to accurate wavelength measurements of pulsed and cw lasers, which can be also applied to incoherent sources, relies on a combination of grating monochromator and three Fabry-Perot etalons [4.50]. The incoming laser beam is sent simultaneously through a small monochromator and three temperature-stabilized Fabry-Perot etalons with free spectral ranges of... [Pg.194]

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See also in sourсe #XX -- [ Pg.36 ]



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