ULTRASHORT PULSE MULTISPECTRAL NON-LINEAR OPTICAL MICROSCOPY

Modeling of Nonlinear Ultrashort Optical Pulse Propagation

I present a numerical package, written in MATLAB, which provides a simplified scripting interface for simulating a host of ultrashort pulse propagation phenomena. With the proliferation of ultrashort laser technologies, the demand for efficient and accurate simulations has grown significantly. Here I introduce a linear-operator-based formalism for nonlinear pulse propagation beyond the slowly-v...

Ultrashort Optical Pulse Measurements by Inteferometric Spectrogram

We experimentally demonstrate that an interferometric spectrogram of the signal pulse can be processed differently to obtain the spectral amplitude and(or) phase profile(s). Consistency between the results obtained by frequencyresolved optical gating (FROG) and modified interferometric field autocorrelation (MIFA) methods is confirmed. We also show that the robustness of MIFA technique against ...

Ultrashort optical-vortex pulse generation in few-cycle regime.

We generated a 2.3-cycle, 5.9-fs, 56-μJ ultrashort optical-vortex pulse (ranging from ~650 to ~950 nm) in few-cycle regime, by optical parametric amplification. It was performed even by using passive elements (a pair of prisms and chirped mirrors) for chirp compensation. Spectrally-resolved interferograms and intensity profiles showed that the obtained pulses have no spatial or topological-char...

Quantifying the limits of unidirectional ultrashort optical pulse propagation

In this paper we explore the limits of the unidirectional pulse propagation equation (UPPE) in general nonlinear media. Our main aim is to investigate under which physical conditions two-way propagation becomes significant, and leads to a breakdown of the unidirectional approximation. Using a spectral constraint appearing in the derivation of UPPE we derive a first correction which renormalizes...

Non-linear Optical Microscopy and Spectroscopy for Biomedical Studies