| 摘要 |
A splitter/combiner that is highly tolerant to parameter deviations as a result of fabrication errors, for example, which might otherwise create undesirable frequency dependency and polarization dependency. It is specifically applicable to integration into the transmission and/or reflection light paths of systems. In this power splitter/combiner system, each splitter/combiner is comprised of two or more directional couplers serially connected to two or more phase shifts in an alternating order (i.e., directional coupler, phase shift, directional coupler, phase shift, directional coupler). The invention addresses the problem of parameter deviations in splitter/combiners by connecting multiple directional couplers and multiple phase shifts and selecting specific coupling and phase values for the directional couplers and phase shifts to minimize the impact of parameter changes on the output signal. The invention also addresses the problem of differential deviations in parameters by providing tunable phase shifts employing controlled effects, such as electro-optic or thermo-optic refractive index changes. |
