Recever sensivity APD OR PIN

[MUKESH KUMAR GUPTA]

I have attached a simple network to analyse the sensitivity APD or PIN photodetector. here at particular Q value (6 ) i am getting receiver sensitivity respectively APD (-40.92) or PIN (-48.97). but as general theory APD sensitivity should be more compare to PIN . also can see journal “Optimization of long-reach TDM/WDM passive optical networks”

[alistu]

Hi Mukesh, Have a look at the report at the link below:

http://www.researchgate.net/publication/256820780_Performance_comparisons_between_PIN_and_APD_photodetectors_for_use_in_optical_communication_systems

As you can see from the figures, Q-factor and sensitivity are related to some other factors and one can’t assume that APD always has better sensitivity than PIN.

[MUKESH KUMAR GUPTA]

thanks for response
this attached file form optiwave sample folder ..they show that APD is better than PIN but actully not like this. i try to take data from suggested paper but not able to find result . always finding that PIN has better performance . can u help me further that which data help to improve APD sensivity compare to PIN.

[alistu]

I lengthened the bit sequence in your simulation (to reduce Q-factor inflation every time the simulation is run) and then made changes to the attenuation for PIN so that Q-factors for both become almost the same. As you can see, the attenuation for APD is more than the attenuation for PIN, which implies that APD in here has better sensitivity (by giving the same Q-factor while receiving less power). I have attached the osd file with the changes.

Cheers!

[MUKESH KUMAR GUPTA]

this file is not open in optisystem 13. please suggest any idea so i can open this…

[alistu]

I am using Optisystem v 13.0.3 which is the newest version, so you would not be able to open it until you use the same version as me. Can you update to the newest version?

[MUKESH KUMAR GUPTA]

till now our institute didnt receive the latest version. we already recevied mail that it is dispatched …form side of optiwave

[MUKESH KUMAR GUPTA]

can i upgrade from optiwave website

[alistu]

The 30-day trial is available in the website. I don’t know if you can upgrade or not, and for these issues you’d better contact Optiwave at info@optiwave.com . However, in the screenshot attached I have shown the aforementioned changes I have made to your system so you would do the same in your simulation.

Cheers!

[MUKESH KUMAR GUPTA]

can i get evolution licence software till we get upgraded software pack .. @ optiwave technical support

[MUKESH KUMAR GUPTA]

According ur snapshot data i am getting two different values of Q factor PIN (60.11) or APD (4.71) not same …after changing PRBS sequence 4096. Q factor value should be same …

[alistu]

Here I have attached a screenshot which shows the results obtained for both photodetectors. You can see Q-factors are very close to each other. I assume you might have made a mistake using the attenuation values I have given in my screenshot in your simulation, or you might have forgotten to lengthen the bit sequence in global parameters as much as I have.

[Amit Garg]

Dear Alistu
I am also facing the same problem of receiver sensitivity if APD and PIN. in many papers and books. I have studied that sensitivity of APD is better then PIN. plz give us some more standard reference paper on which we can rely.

[alistu]

Dear Amit, I don’t know any more reliable paper doing comparison between these two by simulation but in case you are referring to the same problrm as Mukesh is facing, if you manage to open the file I have attached or simulate it using the screenshot, you will see APD has better sensitivity than PIN photodetector.

[Amit Garg]

Dear Alistu
the document attached by you is showing an error ” failed to load the documents” i am having the 13.0 version of optisystem. so plz upload the which is compatible with it.

[alistu]

Dear Amit, Since I am using version 13.0.3, there is no way I can a compatible file with your version of Optisystem which is older than mine. However, you might be able to implement the system by using the screenshot and my explanations in this topic and get the results more or less like the one shown on this page.

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