Robert Koslover
Certified Consultant
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Posted:
2 decades ago
03.10.2009, 13:26 GMT-4
Well, it works for me. I just designed a custom waveguide structure with 3 excited input ports and 4 output ports.
Any chance you are failing to specify unique port numbers for each port? The default port number for each port is 1. If this is your problem, then number your ports 1, 2, 3, etc, and it should work.
Well, it works for me. I just designed a custom waveguide structure with 3 excited input ports and 4 output ports.
Any chance you are failing to specify unique port numbers for each port? The default port number for each port is 1. If this is your problem, then number your ports 1, 2, 3, etc, and it should work.
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Posted:
1 decade ago
06.05.2010, 10:17 GMT-4
Hello,
for me it says definitely
Error: 5025
More than one port used as input.
- Port number: 5,2
- Boundaries: 29,1
- Application mode: In-Plane TE Waves (rfwe)
2 input ports with differen portnumbers.. 2 and 5..
is the way to add a rfwe physics module?
but then one has to repeat the subdomain definitions..
thanks
lukas
Hello,
for me it says definitely
Error: 5025
More than one port used as input.
- Port number: 5,2
- Boundaries: 29,1
- Application mode: In-Plane TE Waves (rfwe)
2 input ports with differen portnumbers.. 2 and 5..
is the way to add a rfwe physics module?
but then one has to repeat the subdomain definitions..
thanks
lukas
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Posted:
1 decade ago
08.06.2010, 12:13 GMT-4
You should try to do superposition
You should try to do superposition
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Posted:
1 decade ago
07.06.2012, 11:11 GMT-4
Well, it works for me. I just designed a custom waveguide structure with 3 excited input ports and 4 output ports.
Any chance you are failing to specify unique port numbers for each port? The default port number for each port is 1. If this is your problem, then number your ports 1, 2, 3, etc, and it should work.
Hello,
I have number my ports 1, 2, 3, etc, but it shouldnt work
thanks
[QUOTE]
Well, it works for me. I just designed a custom waveguide structure with 3 excited input ports and 4 output ports.
Any chance you are failing to specify unique port numbers for each port? The default port number for each port is 1. If this is your problem, then number your ports 1, 2, 3, etc, and it should work.
[/QUOTE]
Hello,
I have number my ports 1, 2, 3, etc, but it shouldnt work
thanks
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Posted:
1 decade ago
14.12.2012, 06:59 GMT-5
Hello Everyone,
I have the follwoing problem.
I have a junction (dicontinuity) of two optical waveguides*. One is simgle mode, the other supports more than one solution, a multimode. My goal is to characterise the coupling of light from the multi-mode one to the single mode one. I suppose this problem can be solved with help of the S-paramters, when having N + 1 ports associated with N + 1 boundary mode analysis nodes in the solver**.
However, in order to make the simulation most general, I need to have N ports set to ''on'' all with specific power P_n and phase offset Phi_n. Unfortunately, as there is more than one port set to ''on'', COMSOL starts to have problems with ''reconstricting'' a wave (superposition of all modes), which yield unphysical results at the output.
Should it be the otherwise, exciting many modes from the single-mode input, only one port would be activated and results would be consistent.
Could anybody explain me exactly how the S-paramters are computed, please? Also, I don't understand how the ports' input power P_in and phase offset Phi_in come in to the equations.
I suppose, making a complete Port-Sweep could help, as I read it activates only one port at a time. However, when doing this, I only obtain one row in the matrix...
I would be very thankful for the answer.
Oleg
*) optical waveguides - a core-and-cladding stack of dielectric material guiding light through the refractive index contrast. So in COMSOL it could either represent an integrated photonic wire or a splice of two fibres.
**) normally, I have N ports, all are set to 'numerical' and there is N boundary mode analysis nodes associated with each port, each computing one effective refractive index specific to that port.
Hello Everyone,
I have the follwoing problem.
I have a junction (dicontinuity) of two optical waveguides*. One is simgle mode, the other supports more than one solution, a multimode. My goal is to characterise the coupling of light from the multi-mode one to the single mode one. I suppose this problem can be solved with help of the S-paramters, when having N + 1 ports associated with N + 1 boundary mode analysis nodes in the solver**.
However, in order to make the simulation most general, I need to have N ports set to ''on'' all with specific power P_n and phase offset Phi_n. Unfortunately, as there is more than one port set to ''on'', COMSOL starts to have problems with ''reconstricting'' a wave (superposition of all modes), which yield unphysical results at the output.
Should it be the otherwise, exciting many modes from the single-mode input, only one port would be activated and results would be consistent.
Could anybody explain me exactly how the S-paramters are computed, please? Also, I don't understand how the ports' input power P_in and phase offset Phi_in come in to the equations.
I suppose, making a complete Port-Sweep could help, as I read it activates only one port at a time. However, when doing this, I only obtain one row in the matrix...
I would be very thankful for the answer.
Oleg
*) optical waveguides - a core-and-cladding stack of dielectric material guiding light through the refractive index contrast. So in COMSOL it could either represent an integrated photonic wire or a splice of two fibres.
**) normally, I have N ports, all are set to 'numerical' and there is N boundary mode analysis nodes associated with each port, each computing one effective refractive index specific to that port.