Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2007-01-23
2007-01-23
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Switch
C385S015000, C385S016000, C359S577000, C359S578000, C359S579000, C359S580000, C359S584000, C359S585000, C359S586000, C359S588000, C359S589000, C359S590000
Reexamination Certificate
active
10745641
ABSTRACT:
A wavelength tunable filter capable of being driven such that reflecting mirrors move more distant as well as closer by using the principle that a direction of the electromagnetic forces changes depending on the direction of the current flowing perpendicular to the external magnetic field. According to the wavelength tunable filter of the present invention, when it is necessary to have the wavelength tuning range and mechanical structure similar to the conventional wavelength tunable filter driven in only one direction, it is possible to lower the maximum force needed to drive the filter to a half, and reduce a probability that a pull-in phenomenon occurs. On the other hand, it is possible to reduce a wavelength change time of the element by increasing a resonant frequency when the same wavelength tuning ranges are implemented by using the same maximum driving forces.
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Carlos F.R. Mateus, et al.; “Widely Tunable Torsional Optical Filter”; IEEE Photonics Technology Letters, vol. 14; No. 6; Jun. 2002; pp. 819-821.
Choi Chang Auck
Jun Chi Hoon
Kim Chang Kyu
Lee Myung Lae
Dupuis Derek L.
Electronics and Telecommunications Research Institute
Font Frank G.
Mayer Brown Rowe & Maw LLP
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