Optical multi-band device with grating

Details Optical multi-band device with grating Optical multi-band device with grating

G - Physics

02

B

G02B 6/02 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2425543

Apparatus for filtering optical radiation, which apparatus comprises a waveguide (50), and which waveguide (50) comprises a grating (51) having a first reflection wavelength band (52) having a first average wavelength (53) and a first group delay (54), and a second reflection wavelength band (55) having a second average wavelength (56) and a second group delay (57), wherein the first group delay (54) and the second gorup delay (57) are different in at least a portion of the second reflection wavelength band (55).

La présente invention concerne un appareil permettant de filtrer les rayonnements optiques, qui comprend un guide d'ondes (50), lequel guide d'ondes (50) comprend un réseau (51) possédant une première bande de longueur d'onde de réflexion (52) dotée d'une première longueur d'onde moyenne (53) et d'un premier temps de propagation de groupe (54), et une seconde bande de longueur d'onde de réflexion (55) dotée d'une seconde longueur d'onde moyenne (56) et d'un second temps de propagation de groupe (57), le premier (54) et le second temps de propagation de groupe (57) étant différents dans au moins une partie de la seconde bande de longueur d'onde de réflexion (55).

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