[zsliuParticipant]

Dear Damian,

Thank you so much for your answer.

[zsliuParticipant]

any one can help me to take a look at the attached above? Thank you so much.

[zsliuParticipant]

finally, I got the more reasonable modulation response. however the curve starts rising around 2.4GHz as shown in fig. some parameters may not be proper.

Attachments:

1. 

   response-scaled.jpg
   

[zsliuParticipant]

Damian, thank you so much for helping me lots on the rsoa module. The modulation bandwidth is still so high, more than 6 GHz when I used the linear gain approximations. I tried to change some parameters. however I havent figured out. any suggestion?

[zsliuParticipant]

Hi,Damian

I tried the linear gain approximations, which is generally used for bulk RSOAs. However, the results are not correct. I even cannot get sin waves . I haven’t figured out where the problem is. could you please help me?

Thanks

Attachments:

1. RSOA_BW_test_v3.osd

[zsliuParticipant]

sorry the second file is too large. I just extracted the corresponding page

Attachments:

1. 2.pdf

[zsliuParticipant]

please find the files

Attachments:

1. 1.pdf

[zsliuParticipant]

yes. please find the two attached documents. the curve in first file page14. the parameters are in the second file at page92.

[zsliuParticipant]

Thank you so much for your reply. The modulation bandwidth is generally less than 2GHz in a real RSOA component. the shape is going high from 100 MHz, may be increased by more than 5dB, then going to drop, even if I changed some parameters.

[zsliuParticipant]

Hi, Damian,

as you suggested, i can detect the peak around frequency. now the problem is the modulation bandwidth unlike real RSOA which show us low pass property. any suggestion on that? thanks

Zhansheng

Attachments:

1. RSOA_BW_test_v2.osd

[zsliuParticipant]

Thanks. please file the attached for M-file.

Attachments:

1. Sinewave.m

[zsliuParticipant]

I have figured out. the code should be as following.
As=1; % amplitude of sine wave
fc=Parameter1*1e9; % sine wave with 15 GHz
fs=Parameter2; % sample rate
tw=Parameter0; % time window

t=[0:1/fs:tw-1/fs];
Time = t;
cs = length(t);
sw = As*sin(2*pi*fc*t);
OutputPort1.TypeSignal = ‘Electrical’;
OutputPort1.Noise = [];
OutputPort1.IndividualSample = [];
OutputPort1.Sampled.Signal = sw;
OutputPort1.Sampled.Time = t;

[zsliuParticipant]

just to upload osd file. it maybe has problem to pass global parameters sample rate and time window to matlab. but even I used fs=640e9; tw=12.8e-9; the output is still null.

Attachments:

1. sine-wave-generator2.osd

[zsliuParticipant]

Hi Damian,

is it possible to set the frequency of Quadrature Modulator to 0 Hz in order to get a baseband signal? and how to set the quadrature demodulatr cutoff frequency?

[zsliuParticipant]

Dear Damian,

Thank you for your reply. I thought I would have to use cosimulation with matlab to generate ofdm.

thanks again