We numerically and experimentally analyze the output characteristics and pulse dynamics of carbon nanotube mode-locked fiber lasers near zero cavity dispersion (from 0.02 to ~-0.02 ps(2)). We focus on such near zero dispersion cavities to reveal the dispersion related transition between different mode-locking regimes (such as soliton-like, stretched-pulse and self-similar regimes). Using our pr...

The generation of stable trains ultrashort (femtosecond to picosecond), terahertz-frequency radiation pulses with large instantaneous intensities is an underlying requirement for the investigation light–matter interactions metrology and ultrahigh-speed communications. In solid-state electrically pumped lasers, primary route generate short through passive mode-locking; however, this has not yet ...

Ultrafast laser spectroscopy is a valuable and increasingly accessible technique for studies of rapid chemical reactions. Critical to ultrafast the concept mode locking, that enables fixed phase relationship between modes, resulting in pulses with very short duration (in fs or ps range). Despite increasing importance lasers chemistry, introduction key concepts behind their operation into underg...

In this paper we present the characterisation of the phase noise and temporal shape of a quantum dash laser. The laser generates an optical comb with a line spacing of 24.5GHz, over a 10nm wide spectrum. The device can operate passively mode locked or actively locked to a synthesiser. The phase noise of the device has been measured and compared in both regimes. By actively mode locking the devi...

A novel harmonic mode-locked fiber laser based on nonlinear multimode interference (NL-MMI) in a microfiber-assisted ultrafast optical switch is proposed this Letter. The can be obtained by tapering the splicing point of graded-index (GIMF) and single-mode fiber, which not only helps to shorten self-imaging period GIMF relax strict requirement NL-MMI length but also improves order. In experimen...

Optically harmonic mode-locking of a semiconductor optical amplifier fiber laser (SOAFL) induced by backward injecting a dark-optical comb is demonstrated for the first time. The dark-optical comb with 60-ps pulsewidth is generated from a Mach-Zehnder modulator, which is driven by an electrical comb at a DC offset of 0.3Vn. Theoretical simulation indicates that the backward injection of dark-op...