Search Results for 'wdm'

[Rafal StefanowskiParticipant]

I have to design a network of OTN have indeed DWDM network designed according to the tutorial page. But how do OTN ???

[Aabid BabaParticipant]

Hello sam!
It works in practical scenario too. It is mainly used in designing the TDM,OFDM,TWDM…and many more systems.
If you wish to know if it works in optisystem , you need to include delays in your system. These delays do not have any physical significance in optisystem. These are used just for simulation purpose here. When designing a practical system you can remove these delays. For bidirectional fiber to work in optiwave, you must include delays.
please refer to chapter 5 of the tutorial i am attaching below.

[alistuParticipant]

Hi Rafal,

There is an OptiSystem sample file showing the architecture of a passive optical network. the file’s name is “CWDM PON”. Of course, you need to use DWDm instead of CDWM, but this implementation demonstrates different parts of PON access network and helps you arrange your design in this way.

Regards

[Yasir Saifullah]

When I try to simulate the sample WDM PON, an error occurs in optisysen 14.0. I have attached the error snapshot.
If anone have any idea then let me know, Thanks.

[Rafal Stefanowski]

Hello, I would like to simulate the OTN network. Can anyone help ???

[FAYIQA NAQSHBANDI]

To reduce the frequency chirp introduced by directly modulated lasers..which of the availible filters in optiwave can be best used for optical spectral reshaping ?

[Tung Tran VanParticipant]

I created new project Test2 to test OAs. The operating wavelength range: 192.1 – 196 THz. I used OSA and WDM Analyzer for checking, all wavelengths are amplified.
In layout1, everything works OK. But node Node3 in layout2, wavelengths’s BER are different lot (as mentioned above): 192.1, 192.2(~10^-13) -> 195.1, 195.2 (~10^-6)
I attached project Test2.
Thanks

[Tung Tran VanParticipant]

A DWDM signal has wavelengths (192.1 THz – 195.5 THz) with similar signal power, noise & OSNR. But the BER of the signal decreases from 192.1 (~10^-12) to 195.5 (~10^-6)? A demux has bandwidth 13 GHz. I dont understand why their BER are different
I attached some photos. Please help me how to fix. Thanks.

[aasif bashir darParticipant]

have a look on these;

1.https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwjugc-06obLAhWo5KYKHQAqA_UQFghLMAU&url=http%3A%2F%2Foptiwave.com%2Fwp-content%2Fuploads%2F2015%2F08%2Fmy-paper.pdf%3F4f9d00&usg=AFQjCNFDq8mO549JObYiGlxpkM8PcPq-6Q&sig2=6vX8dyazT6sUkLrH1_y5UA&bvm=bv.114733917,d.dGY

2.https://www.academia.edu/6242491/DEVELOPMENT_OF_OFDM_IN_WDM-RADIO_OVER_FIBER_ACCESS

[Aabid BabaParticipant]

Hello Duy,
As alistu mentioned OFDM for future Passive optical networks is promising technology,undoubtedly it is. But you can improvise by going for TWDM for future PONs.In addition to it, you can compare OFDM and TWDM for the same.
Just refer to the link below just to get some sort of idea.

https://techzine.alcatel-lucent.com/twdm-pon-taking-fiber-new-wavelengths

Regards

[Swapandeep KaurParticipant]

sir i was getting output power lesser than input power , so when i substituted it in the formulae (pout-pin)/ppump=PCE=lambda,p/lambda,s and Gain=(lambda,p/lambda,s)*ppump/pin i got negative values because i took input power as power of wdm tramsmitter

[alistuParticipant]

To calculate gain and noise figure, the information provided by dual port WDM analyzer can be used. However, in case you are using components acting as the black box (such as EDFA black box), there is the option of choosing the gain as the parameter you can set to be constant in the whole spectrum.

[alistuParticipant]

Since the dual port WDM analyzer calculates the gain and flatness of your optical amplifier, you should connect it across the optical amplifier as you have mentioned. In case you are making use of a hybrid optical amplifier, then this means connecting it across both amplifiers used in the design.

[alistuParticipant]

Hi Aabid,

If you only intend to use 3 of the MUX inputs, it would be fine and you may do such a thing. However, the input port that is not used in your system should be connected to the component “optical null” available in the “Tools Library” in OptiSystem libraries. Otherwise, the number of WDM Mux 4×1 component cannot be changed.

Regards

[alistuParticipant]

Hi all,

In addition to what Aasif mentioned about add drop multiplxers using two fiber bragg gratings, I think it would be worth looking an explanation provided earlier in this regard (which I think might be implemented using Optiwave):

ROADM in DWDM network

Regards