High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

Electro-optic polymers for high speed modulators

Different electro-optic polymer systems are analyzed with respect to their electro-optic activity, glass transition temperature (Tg) and photodefinable properties. The polymers tested are polysulfone (PS) and polycarbonate (PC). The electro-optic chromophore, tricyanovinylidenediphenylaminobenzene (TCVDPA),which was reported to have a highest photochemical stability [1] has been employed in the...

Photodefinable electro-optic polymer for high-speed modulators

Direct waveguide definition of a negative photoresist (SU8) containing tricyanovinylidenediphenylaminobenzene (TCVDPA) as electro-optic (EO) chromophore, has been demonstrated for the first time. This was possible by utilising the chromophore low absorption window in the UV region allowing crosslinking of the host polymer by exposing to UV light followed by thermal curing. TCVDPA was modified b...

Continuous Phase Modulation for High Speed Fiber-optic Links

Effects of Nonlinearity and Polarization Mode Dispersion on High Bit- rate Fiber-optic Communication Links

We study the performance of a typical fiber-optic communication link operating at 10 Gbps, comprising of multiple spans of standard single mode fiber (SSMF), in-line amplifiers and dispersion compensating fibers (DCF). The effects of attenuation, chromatic dispersion, nonlinearity and polarization mode dispersion (PMD) are taken into account. By numerically solving the non-linear Schrodinger eq...

Noise in Fiber Optic Communication Links

The physics of noise in optical communication links is of great interest in the design of fiber optic communication systems. In this report the role of noise in optical communications, and how it can limit the performance of optical communications systems, will be examined. The origins of noise in the various optical and analog electronic components will be discussed, and a methodology for a “n...