Background
Our group focuses on the development of fiber-based laser sources. We investigate a novel pulsed regime, complex intra-cavity soliton dynamics, and nonlinear pulse compression. We progressively expand the operational wavelength range of ultra-short pulses. Our research horizon routes towards boosting high power performance in an ultra-compact device based on a tapered fiber amplifier technology.
Ultra-short pulsed fiber lasers
Our core expertise is a short-pulsed fiber-based seed laser operating at the traditional (rare-earth dopants) and non-traditional (non-rare-earth dopants) wavelength ranges. Our research portfolio composes conservative solitons, dissipative solitons (all-normal dispersion lasers), similariton pulses, bound solitons, and a bunch of solitons regimes. We work both on industrial-grade and laboratory systems.
High-power fiber amplifier
We are continuously working on the development of high-power compact laser systems based on an innovative technological platform – an active tapered fiber amplifier in close collaboration with Ampliconyx Oy. An active tapered fiber is characterized by a constant increase of core/cladding diameter resulting in an increase of mode-field diameter along the amplification route. This geometrical architecture of the active fiber enables the elevation of thresholds for nonlinear effects such as self-phase modulation, stimulated Raman and Brillouin scattering. As a result, the amplifier is capable of direct amplification of short pulses avoiding multiple pre-amplifiers cascade and pulse stretching.
Theoretical modeling
A fiber-based laser is a complex environment with multiple variables. Short pulse formation and propagation are always accompanied by non-linear phenomena. Our group is mastered with self-developed modeling tools to perform comprehensive theoretical analysis.