Search Results for 'DPSK'

[Abdallah Ismail]

Dear All,
Actually I built a mode multiplexing system with two mode each one with 8-DPSK.
But the system is working well for the fundamental mode but it provide closed eye diagram for the LP02 carrying mode.
I don’t know the source of the problem but i think that the power of LP02 mode is small.
The main 8-DPSK is downloaded from Optiwave download area.

Can anyone help me to improve LP02 BER?
Can i use EDFA black box for the LP02 amplification before transmission or it works only for LP02? (i tested it,it is not working with me).

Attachments:

1. Optical-Differential-8-Level-Phase-Shift-Keying-OD8PSK-MDM-EDFA.osd

[Damian MarekParticipant]

If you are ignoring self phase modulation, then the primary reason that DPSK provides the best performance is that it provides minimal spectral content. Dispersion degrades signals more the larger their spectral content, because there is a larger separation between the fastest and slowest wavelength. At the following link you can see visually that DPSK has a more compact spectral signal.

Advanced Modulation Formats

[ANKIT]

Dear all,

I compared three different modulation formats named as CSRZ, MDRZ and DPSK using DCF. The design is operating at 40 Gbps data rate for the transmission distance as long as 4000 Km.

The results show that DPSK modulation format gives the best performance among all three.

Can anybody suggest me that how DPSK minimizes the dispersion in a better way among all three? Can anybody give me the comparison of these three modulation format in terms and dispersion.

Regards