- This topic has 16 replies, 7 voices, and was last updated 8 years, 10 months ago by Sanjeev kumar.
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November 15, 2014 at 2:09 pm #15615MonikaParticipant
I am trying to design PDM-QPSK in optisystem v11.
Can any one help me to design that system?
Please show me the circuit for that.. -
November 15, 2014 at 2:59 pm #15623siva rama krishnaParticipant
you can refer this paper
“Influence of Pulse Shape in 112-Gb/s WDM PDM-QPSK Transmission” -
November 15, 2014 at 5:57 pm #15626RavilParticipant
Here you can find its features and comparison with other modulation formats:
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November 15, 2014 at 5:58 pm #15627RavilParticipant
attached file here…
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November 16, 2014 at 12:13 am #15653MonikaParticipant
I am working in optisystem v11. And pulse carver, DFB and EC-LT are not given in that version. In this case what I should do?
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November 16, 2014 at 2:53 am #15656Abdallah IsmailParticipant
I downloaded the design from Optiwave site.
Please check osd and m files.
also i have many designs in optiwave examples but i don’t now it’ll be opened by 11 version because it made for version 13.
You can check optisystem>files>Examples>Advanced Modulation systems>psk Systems>QPSK -
November 16, 2014 at 4:00 am #15662siva rama krishnaParticipant
Details of pulse carving can found on this link
<a href=”https://optiwave.com/forums/topic/generation-of-rz-dqpsk-modulation-for-different-duty-cycles/” target=”_blank”></a> -
November 16, 2014 at 9:27 am #15669MonikaParticipant
@Abdallah- can u please send me the image or screenshot of this osd or m file?
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November 16, 2014 at 1:00 pm #15670MonikaParticipant
Plz give me an idea to design 90° optical hybrid.
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November 16, 2014 at 3:22 pm #15678RavilParticipant
Are you able to use MLL with short pulses or your bit rate is too high for that?
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November 16, 2014 at 3:27 pm #15679RavilParticipant
Here is the scheme I used for DQPSK. You can see 90 deg. phase produced by local generator (at the transmitter) and couplers are used at the receiver. I don’t have scheme in v11, sorry.
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November 17, 2014 at 7:26 am #15691MonikaParticipant
@ Ravil- thanks alot..but i want to use 90° optical hybrid at the rx. Or u have made pdm-qpsk system then plz upload pic for that.
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December 3, 2014 at 1:40 pm #16368Damian MarekParticipant
Here is a brief explanation of the component in detail attached.
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November 23, 2014 at 9:48 pm #15923Heitor GalvaoParticipant
See this tutorial: https://optiwave.com/applications/100-gbps-dp-qpsk-system-with-digital-signal-processing/
my compliments -
February 10, 2015 at 12:51 am #17543MonikaParticipant
@Heitor- Thanks alot!!
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February 10, 2015 at 12:53 am #17544MonikaParticipant
for M.Tech Thesis what work can be done based on this paper..please suggest me.
i have attached my paper here. -
December 27, 2015 at 10:36 am #28930Sanjeev kumarParticipant
Ravil sir what bit rate, sequence length u have adjusted for dqpsk system to work satisfactorily to give result in terms of ber and q factor.
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