1. BY
SATYA PRAKASH ROUT

2.  Abstract
 Literature Review
 Introduction To Optical Networks
 Advance Modulation Formats
 Comparison and Effects of Optical Modulation
Formats on Performance of Optical Network
 Conclusion
 Proposed Future Work
 References

3. Next generation optical network of 10 Gb/s and 40 Gb/s are based on
optically routed WDM/DWDM system. Enabling global broadband
services and high intensity bandwidth applications require higher per
fiber transport capacities and lower costs per end to end data with
higher spectral efficiencies. So various optical modulation formats
are used to achieve high spectral efficiency and designing high speed
WDM optical network. This results to various linear and non linear
impairments that restrict the speed of optically routed transport
network.

4.  The high speed optical networks can be achieved
by using proper advance modulation formats to
reduce linear and non linear impairments.
 Research is fully based on how we can opt
different modulators along with different a
modulation formats to achieve a cost effective
network.
 Comparison of various optical modulation formats
by analyzing the spectral efficiency

5.  Todays world relies on high speed broadband services such as
Multimedia broadcast services, Voice and Data Services, high
speed computer networking etc. in a cost effective manner.
 Optical communication system provides an excellent solution to
achieve high data rate communication system
 Optical Communication system can support Tb/s capabilities with
thousand kilometers which makes an ideal base for high capacity
wireline networking

7.  Intensity modulation formats
1. Non-Return To Zero On-Off Keying(NRZ-OOK)
2. Return To Zero On-Off Keying(RZ-OOK)
3. Carrier-Suppressed Return To Zero (CSRZ)
4 Duo-Binary Optical Modulation

8.  Phase Modulation Formats
1. DQPSK-NRZ Modulation Format
2. DQPSK-RZ Modulation Format
3. DPSK-RZ Modulation Format
4. DPSK-NRZ Modulation Format

11.  Advanced optical modulation formats help in
designing high capacity optically routed network/
WDM network.
 While designing 10Gbps/40Gbps/100Gbps optical
transport networks, advance modulation plays an
crucial role of mitigating the linear distortions and
non linear distortion
 Spectral efficiency and throughput is well shaped
by implementing advance modulation formats

12.  Implementing and focusing on two advance
modulation formats that combats fiber nonlinear
impairments
1. Correlative Coding
2. Partial response formats

13.  Peter J. Winzer, Rene´-Jean Essiambre, Advanced Optical
Modulation Formats., Choice of the right modulation format is
key to building flexible and cost-effective high-capacity optically
routed wavelength division multiplexed fiber networks., Vol. 94.,
No. 5., May 2006
 ,Eugen Lach, Wilfried Idler, Modulation formats for 100G and
beyond., Optical Fiber Technology 17 (2011)., 377–386
 Peter J. Winzer, Modulation and multiplexing in optical
communication systems., IEEE LEOS NEWSLETTER., February
2009