Up-conversion of optical signals with multi-longitudinal-mode pump lasers

Mode - locked fiber ring lasers with semiconductor optical

This thesis is on the development of high-speed pulsed lasers at wavelengths around 1.55 m for applications in the fiber optic communications field. The realization of future optical transmission systems and signal processing circuits will require such optical pulse sources, capable of producing picosecond pulses with a low timing jitter at repetition rates of tens or even hundreds of Gigahertz...

Pump pulse effects in synchronously pumped mode-locked dye lasers

Mode interaction in multi-mode optical fibers with Kerr effect

The coupled nonlinear Schrödinger equations (CNLS) which describe two linearly polarized modes interaction (with taken into account the polarization modes interaction) in the Kerr medium is derived. We take first two modes for cylindrical fiber which are also known as HE11 and TE01 modes which have different propagation constant. This approach bases on projection to orthogonal function basis (B...

Longitudinal Mode Competition in Chirped Grating Distributed Feedback Lasers

Gain competition often inhibits the simultaneous lasing of multiple longitudinal modes in homogeneously broadened laser systems. A stability analysis is developed to demonstrate that the two lowest order degenerate longitudinal modes in an indexcoupled distributed feedback (DFB) laser will lase simultaneously when the index grating is chirped asymmetrically along the axis of the device. This ch...

Measurement of optical mode loss in visible emitting lasers