Optical spectrometer with several spectral bandwidths

Details Optical spectrometer with several spectral bandwidths Optical spectrometer with several spectral bandwidths

G - Physics

01

J

G01J 3/12 (2006.01) G01J 3/18 (2006.01) G01J 3/28 (2006.01) G02B 6/24 (2006.01) G01J 3/02 (2006.01)

Patent

CA 2429247

An optical spectrometer (1) comprises at least two coupling apertures (6a, 6b) with different mode field diameters, a means (8) for dispersing the light beams (12a, 12b) exiting each of the coupling apertures (6a, 6b) along a dispersion axis and at least two decoupling apertures (11a, 11b) on which the dispersed light beams are imaged and whose mode field diameters each correspond to the mode field diameters of the associated coupling apertures (6a, 6b). Due the enlarged mode field diameter, a larger spectral fraction of dispersed light beams, i.e. light of a larger spectral bandwidth, can be coupled into the decoupling aperture (11b) than into the decoupling aperture (11a).

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