Erdem A. Ultanir

Coherent interactions of dissipative spatial solitons

We report observation of the interaction between two coherent dissipative spatial solitons in a periodically patterned semiconductor optical amplifier with power levels of tens of milliwatts. The interactions are nonlocal and phase dependent and exhibit surprising features, such as soliton birth. The experimental results are in good agreement with the numerical simulations.

Dissipative photonic lattice solitons

We show that discrete dissipative optical lattice solitons are possible in waveguide array configurations that involve periodically patterned semiconductor optical amplifiers and saturable absorbers. The characteristics of these low-power soliton states are investigated, and their propagation constant eigenvalues are mapped on Floquet-Bloch band diagrams. The prospect of observing such low-power dissipative lattice solitons is discussed in detail.

Stability properties of multiwavelength, incoherent, dissipative spatial solitons.

We have investigated the interaction between two dissipative spatial solitons of different frequencies in periodically patterned semiconductor optical amplifiers. The experimental results are in good agreement with the theory. Simulations suggest that multiwavelength interactions do not produce stable bound solitons unless the systems modeling equations are completely symmetric.

Dissipative Spatial Soliton Phenomena in Active Semiconductor Optical Amplifiers

We review our observations of multiple solitonic phenomena in electrically pumped semiconductor optical amplifiers (SOAs) including the generation of scalar solitons, their interactions, the possibility of incoherent vector solitons and modulational instability.

Dissipative solitons in SOAs

We have investigated the dissipative spatial solitons in optical amplifiers. These solitons have unique properties (such as autosignal recovery) throughout their formation and interactions. They require 10 s of mWs and <ns inputs to form solitons.

Stable spatial autosolitons in semiconductor amplifiers

We report the first experimental observation of spatial dissipative solitons (autosoliton) in a patterned electrode semiconductor amplifier (SOA). Our results fit with the numerical simulations which support the bifurcating behavior of solitons with current pumping.

Stable spatial solitons in semiconductor optical amplifiers

The existence of stable dissipative spatial solitons at low intensities in patterned electrode semiconductor optical amplifiers (SOAs) is predicted theoretically. In contrast to conventional SOAs, this system may support stable solitons because the inherent saturating losses provide subcritical bifurcations for both the plane-wave and the soliton solution.