The accurate focusing of ultrashort laser pulses is important in multiphoton microscopy, in order to achieve high resolution imaging in biological specimens. Recent advances have shown the improvements to imaging through the inclusion of an adaptive optic element in the microscope. Using a device such as a liquid crystal spatial light modulator or a deformable mirror to modify the wavefront of ...

Introduction: Ultrashort optical pulses are nowadays a basic requirement for numerous applications such as optical communications, nonlinear spectroscopy or terahertz field [1]. As measurement and control of these pulses cannot be achieved by electronic means, alloptical methods have been developed. For example, temporal intensity profiles can be reconstructed from cross correlation records bas...

The use of ultrashort pulses for fundamental studies and applications has been increasing rapidly in the past decades. Along with the development of ultrashort lasers, exploring new pulse diagnositic approaches with higher signal-to-noise ratio have attracted great scientific and technological interests. In this work, we demonstrate a simple technique of ultrashort pulses characterization with ...

In this paper, propagation of ultrashort pulses through a long 3.5 meter water channel was studied. Of particular interest was the attenuation of the beam at various lengths along the variable path length and to find an explanation of why the attenuation deviates from typical Beer Lambert law around 3 meters for ultrashort laser pulse transmission. Laser pulses of 10 fs at 75 MHz, 100 fs at 80 ...

Slow and fast light enables key functionality in various rf applications and all-optical networks. Semiconductor-based schemes offer electrical control of velocity at very high bandwidths in an extremely compact device. Furthermore, they operate at room temperature and can be easily integrated into various optical systems. Ultrafast nonlinear processes in semiconductor optical amplifiers (SOAs)...

Employing optical phase-contrast microscopy we study the morphology of ultrashort pulsed laser-induced modifications in bulk fused silica and in other optical transparent materials for different conditions of irradiation. The influence of the input pulse energy, focusing depth, and number of pulses per site is investigated in order to establish optimal irradiation conditions for direct writing ...