Hybrid Modulation Formats Enabling Elastic Fixed-Grid Optical Networks

Comparison of Optical Modulation Formats

Investigation of 40 Gbps DWDM Optical System by using Hybrid Optical Amplifier with Different Modulation Formats

This paper demonstrates the comparison of 40 Gbps DWDM system using hybrid optical amplifier configurations (EDFA-EDFA and EDFA-SOA ) are implemented with RZ and NRZ encoding techniques at various distance along with DCF having dispersion 80 ps/nm/Km . DWDM systems with 4 channels each having a bit rate of 10 Gbps and 0.8 nm equal channel spacing. The performance of EDFA-EDFA and EDFA-SOA hybri...

Conversions among binary optical modulation formats.

We study the intrinsic relations and conversions among different binary modulation formats such as non-return-to-zero (NRZ), return-to-zero (RZ), carrier-suppressed return-to-zero (CSRZ), differential-phase-shift-keying (DPSK), duobinary, and alternate-mark-inversion (AMI). In particular, we experimentally demonstrate the new conversion from CSRZ to duobinary using a Mach-Zehnder delay interfer...

Performance Improvement from Optical Modulation Formats in Practical Systems

Performance of Modulation Formats on Dwdm Optical Systems

The need for higher transmission rate in Dense Wavelength Division optical systems necessitates the selection of a suitable modulation format for the efficiency of the optical system and has been a key issue in recent research (Vassilieva et al 2001). Generally modulation formats are classified into On Off Keying (OOK) and Phase Shift Keying (PSK) techniques (Idler et al 2003). Over the last fe...