Kovendhan Vijayan Email & Phone Number

United States

New Providence, New Jersey, United States

Sweden

Gothenburg, Sweden

• Cross-phase modulation mitigation using phase-sensitive amplifiers was verified with simulations and experiments. Phase-sensitive amplifiers mitigate the distortions caused by self-phase modulation better than cross-phase modulation • Long-haul wavelength-division multiplexing system with phase-sensitive amplifiers as inline amplifiers was studied. The transmission reach increase when using phase-sensitive amplifiers compared to phase-sensitive amplifiers decreased with an increasing number of channels. • The modulation format (4-, 16-, 64-, 256-QAM) dependence on transmission reach increase when using phase-sensitive amplifiers compared to phase-insensitive amplifiers was studied. Enhancement in transmission reach was obtained with higher-order modulation formats due to the better nonlinearity mitigation in phase-sensitive amplifiers

Karlsruhe Area, Germany

• The arbitrary waveform generator output RF signal power was optimized for best performance in a back-to-back scenario when using different modulation formats (4- and 16- QAM).• A wavelength division multiplexed (WDM) transmission experiment which employs intradynedetection of a polarization division multiplexed quadrature phase-shift keying modulation at a symbol rate of 40 GBaud was carried out with a total of 52 WDM channels, an aggregate line rate of 8.32 Tbit/s was transmitted over a 75 km long standard single-mode fiber link with a net spectral efficiency of 3.5 bit/s/Hz. • A second WDM back-to-back experiment using 16-quadrature amplitude modulation and self homodyne detection with a polarization division multiplexed local oscillator was also demonstrated giving a data rate of 6.4 Tbit/s with 40 channels modulated at a symbol rate of 40 GBaud.

Karlsruhe Area, Germany

• The gain bandwidths of the erbium-doped fiber amplifiers (EDFAs) were measured at the different pump and signal input wavelengths and powers. • MATLAB® and LabVIEW® were used to capture and analyse the data.

Karlsruhe Area, Germany

• Designed tapers for efficiently coupling light from silicon nitride ring resonators to the optical fiber• Simulations were performed using BeamPROP® to study the different tapers

Institute Fresnel - Aix Marseille University

• Gained a thorough knowledge in thin films• Designed and implemented the Michelson interferometer with suitable optics• Designed a LabVIEW® Interface to calculate the phase delay in the thin films.

Chennai Area, India

• Studied the working of mode-locked fiber laser (MLL)• Simulated the MLL along with the regenerative feedback chain to increase the stability using Simulink®• Designed and implemented a regenerative chain to stabilize the MLL at 100MHz• Designed and implemented a repetition rate-independent regenerative chain to stabilize the MLL

Chennai Area, India

• Created a LabVIEW® Interface to control a 3-stage motion controller used for fabrication.• Fabricated fiber Bragg gratings (FBGs) using the phase mask method• Improved the reflectivity of the FBGs by increasing the length of the gratings. • Characterized the fabricated FBG by measuring the transmission and reflection spectrums.

Doctor Of Philosophy - Phd, Optical Communication

Master'S Degree, Photonics

Activities and Societies: • Event Manager - Optics Student in Karlsruhe (OSKar) • Co-ordinator - IONS Karlsruhe 2015

Master'S Degree, Photonics

Bachelor'S Degree, Electrical, Electronic And Communications Engineering Technology/Technician, 8.80/10 First Class With Distinction

Activities and Societies: • Founding President, St. Joseph’s College of Engineering - OSA Student Chapter • President, St. Joseph’s.