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Divide by zero in parametric sweep - ridge waveguide

Posted 9 nov. 2020, 22:17 UTC−5 Wave Optics, Studies & Solvers Version 5.5 0 Replies

Travis Gartner
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Hello,

I'm new to COMSOL and am running into an error when trying to perform a parametric sweep of the height/width of the core of a silicon waveguide. The error is

  • Parameters: "h_core","8E-7" The following feature has encountered a problem:
  • Feature: Stationary Solver 1 (sol1/s1) Division by zero.
  • Function: / Failed to evaluate expression.
  • Expression: abs(try_catch(comp1.ewbe.port2.Pin,1)/comp1.ewbe.Pmode_2) Failed to evaluate variable.
  • Variable: comp1.ewbe.tEmodex_2
  • Defined as: sqrt(abs(try_catch(comp1.ewbe.port2.Pin,1)/comp1.ewbe.Pmode_2))*comp1.ewbe.tE0modex_2 Failed to evaluate expression.
  • Expression: nojac(comp1.ewbe.tEmodex_2) Failed to evaluate variable.
  • Variable: comp1.ewbe.PortConstrx
  • Defined as: nojac(comp1.ewbe.tEmodex_2)if((abs(unit_rad_cfarg(comp1.ewbe.beta_2))<=(0.25pi))||(abs(unit_rad_cfarg(comp1.ewbe.beta_2))>=(pi*0.75)),comp1.ewbe.S2x,0) Failed to evaluate expression.
  • Expression: comp1.ewbe.tEx-comp1.ewbe.PortConstrx

Im not sure why there is an error, i can run the simulation for one value at time with no error for the values I am inputting into the sweep

I'm sure its an easy fix but I am new to the software and am not sure how to go about it

Thanks

0 Replies Last Post 9 nov. 2020, 22:17 UTC−5
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Hello Travis Gartner

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