Optical waveguides – Integrated optical circuit
Reexamination Certificate
2005-06-28
2005-06-28
Healy, Brian M. (Department: 2883)
Optical waveguides
Integrated optical circuit
C385S011000, C385S037000, C385S129000, C385S130000, C385S027000, C385S131000
Reexamination Certificate
active
06912331
ABSTRACT:
By judicious engineering of grating parameters such as tooth shape, duty cycle and phase offset, the grating strengths and effective indices of the polarization modes of a grated waveguide are adjusted over a wide range of values to achieve a desired level of polarization sensitivity, or insensitivity. In the typical example, the physical geometry of the grating teeth is adjusted so that degenerate behavior (nTE=nTMand κTE=κTM) is obtained for two polarization modes; the effective refractive indices and grating strengths are matched for the TE and TM polarization modes. In the current embodiment the sidewall gratings are used in which the tooth profile is selected in order to equalize the grating strength for each polarization mode.
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Foresi James S.
Fried Dale G.
Lim Michael H.
Skorobogatiy Maksim A
Viens Jean-Francois
Cambrius Inc.
Gauthier & Connors LLP
Healy Brian M.
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