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Adiabatic couplers: design rules and optimization

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3 Author(s)
Ramadan, T.A. ; Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA ; Scarmozzino, Robert ; Osgood, R.M.

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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Lightwave Technology, Journal of  (Volume:16 ,  Issue: 2 )