OWC

[mabrok]

Hi

Is the feature of optical wireless(ex.Infrared) available in Optisystem?

Regards

[Damian Marek]

Yes, we have two components which model wireless links. The FSO and OWC components.

[Deepanshu sharma]

Can you please tell me the modelling behind optisystem FSO component ??.. how it will work when we use 6 WDM transmitted input and then pass it through FSO channel ??

[alistu]

Hi Deepanshu,

The information regarding modelling of the OptiSystem FSO component has been mentioned in the technical background part in the help section in the component properties. There you can see how the FSO parameters contribute, and the references based on which the modelling has been done are also mentioned.

Regards

[mabrok]

Hi, Regarding OWC, do u have path loss estimations?

[alistu]

Hi Mabrok,

In both FSO channel component and OWC component the channel loss can be taken into consideration by setting a value for it in the component properties. There you can see “attenuation” parameter expressed in dB/km. If you don’t change the value, the components would go with their default values.

Regards

[prakash jat]

can we have focusing lens component through matlab component in owc channel,or direct? component in optisystem

[alistu]

Hi Prakash,

You can create any component using Matlab component and the related Matlab code. But there are two lens components available in OptiSystem as far as I know: Vortex lens component and thin lens component. These two components are placed in the passive folder in the multimode library of OptiSystem.

Regards

[prakash jat]

hi alistu
can we use vortex and thin lens in owc or is it designed for multimode fiber ?
Regards

[alistu]

The component is designed for multimode systems and I did not find any explanations in the help section suggesting it can only be used in multimode fibers. So I think you can use it there. However, I hope someone with more experience on this would also help you here by confirming what I mentioned.

[Naazira Badar]

Hi Prakash..
Have you used the lens in your FSO system? Did it bring any change in the results where in your had not used the lens?

Regards.

[prakash jat]

hi naaazira

welcome to owc link design
i used lens in multimode section ( mm tx —- channel—- lens— mm rx)but there is no change in ber ( whatever value i select),
if you try for matlab then it may be one solution

regards

[Naazira Badar]

Hi Prakash.. Thanks a lot for replying.

I am working on FSO channel based system and I haven’t used any lens explicitly. Hence I wanted to know if the performance improves by making use of those.

Well actually the FSO channel itself models tx and rx telescopes wherein lens would be incorporated itself. That’s why I think addition of a lens system explicitly makes no difference.

Regards.

[Naazira Badar]

And Prakash, Could you please elaborate on what exactly is a multimode section in OWC?

regards.

[prakash jat]

hi naazira………welocome

you are correct in case of single mode laser but when you use spatial laser then how can we reduce spot size( i mean FSO telescope does’t reduce spot size because it is not modeled as spatial feature) so ultimately FSO component dosn’t reducing spot size, so solution is that use matlab lens.

let me know if it does

[prakash jat]

i am attaching demo file , please obeserve two thing

1. spot size
2. BER

after that tell me , what wrong with that software

[prakash jat]

sorry for delay

optisystem doesn’t provide spatial feature in FSO component

Attachments:

1. demo.osd

[prakash jat]

so you can reduce your spot size through thin lens
if you want to obeserve this spot size at Rx Telescope then see profile of Sushank choudhary , i think , he made matlab code for spatial feature visulization

let me konw what do you get

[prakash jat]

My one more question from optisytem group that how to model spatial feature in matlab, is there any demo file?

[alistu]

Hi Prakash,

Even though the discussion in the following forum page is rather general, but since it is an answer to a question regarding creating spatioal modes using Matlab component, I suggest you just have a look to see if it can be of any help:

Matlab Co-Simulation

Regards

[Naazira Badar]

Hi Prakash..
Could you please tell me which LASER from the Optical Sources library have you used in this system?
Also,Could you please tell me which version of Optiwave have you used for the file you have attached above?

I have optisystem 14.0. And I seem to have some issues with opening files of the lower version.

Regards.

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