Wavelength tunable optical filter

Details Wavelength tunable optical filter Wavelength tunable optical filter

G - Physics

02

B

88/0.1

G02B 5/26 (2006.01) G02F 1/225 (2006.01)

Patent

CA 2029051

- 12 - WAVELENGTH TUNABLE OPTICAL FILTER Abstract A wavelength tunable optical filter having a characteristic single transmission peak for enhanced tunability comprises a phase control section positioned between a Distributed Bragg Reflector section and a high reflectivitymirror. The Distributed Bragg section comprises a periodic grating positioned over an end portion of a passive waveguide region whereas the phase control section comprises the portion of the passive waveguide region located between the grating and the mirror. Continous tunability in the range of several THz may be achieved by controlling the refractive index in either the phase control or distributed Bragg reflector section. The optical filter is expected to have a frequency switching time of a few nanoseconds and, thus, is applicable to both transmission and switching applications.

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