Adiabatic couplers: design rules and optimization |
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Authors: | Ramadan T.A. Scarmozzino R. Osgood R.M. Jr. |
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Affiliation: | Microelectron. Sci. Lab., Columbia Univ., New York, NY; |
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Abstract: | Explicit analytic design rules are derived for both 3 dB and full adiabatic couplers. The design rules are in excellent agreement with numerical calculations using the beam propagation method (BPM). It is shown that the length scaling for 3 dB couplers compared to full couplers makes the former more difficult to design. The design for each case is optimized to obtain the upper limit of performance and a comparison is carried out between two different design geometries for both 3 dB and full adiabatic couplers |
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