Femtosecond laser microfabrication

When femtosecond laser pulses are focused tightly into a transparent material, the intensity in the focal volume can become high enough to cause nonlinear absorption of laser energy. The absorption, in turn, can lead to permanent structural or chemical changes. Such changes can be used for micromachining bulk transparent materials. Applications include data storage and the writing of waveguides and waveguide splitters in bulk glass, fabrication of micromechanical devices in polymers, and subcellular photodisruption inside single cells. In this talk we will review recent results obtained in... Read more about Laser induced microexplosions and applications in laser micromachining

When femtosecond laser pulses are focused tightly into a transparent material, permanent structural or chemical changes occur. These changes can be used for micromachining bulk transparent materials. A number of applications in the fabrication of micro-optical devices and in biology and medicine will be discussed.

When femtosecond laser pulses are focused tightly into a transparent material, the intensity in the focal volume can become high enough to cause nonlinear absorption of laser energy. The absorption, in turn, can lead to permanent structural or chemical changes. Such changes can be used for micromachining bulk transparent materials. Applications include data storage and the writing of waveguides and waveguide splitters in bulk glass, fabrication of micromechanical devices in polymers, and of all-optical sensors.

When femtosecond laser pulses are focused tightly into a transparent material, the intensity in the focal volume can become high enough to cause nonlinear absorption of laser energy. The absorption, in turn, can lead to permanent structural or chemical changes. Such changes can be used for micromachining bulk transparent materials. Applications include data storage and the writing of waveguides and waveguide splitters in bulk glass, fabrication of micromechanical devices in polymers, and subcellular photodisruption inside single cells.

When femtosecond laser pulses are focused tightly into a transparent material, the intensity in the focal volume can become high enough to cause nonlinear absorption of laser energy. The absorption, in turn, can lead to permanent structural or chemical changes. Such changes can be used for micromachining bulk transparent materials. Applications include data storage and the writing of waveguides and waveguide splitters in bulk glass, fabrication of micromechanical devices in polymers, and subcellular photodisruption inside single cells.

By tightly focusing femtosecond laser pulses, we micromachine optical glass using pulse energies of just a few nanojoules. We have used this technique to manufacture optical waveguides inside bulk glass.

The use of femtosecond laser pulses for high-precision micromachining of the surface and bulk of transparent materials has received much attention in recent years. Several groups have demonstrated the direct writing of waveguides and other photonic devices inside bulk glass using femtosecond lasers. Many of the capabilities demonstrated in these experiments offer solutions to problems the telecommunications industry is currently facing. A major obstacle, however, for industrial adoption of the techniques that have been developed is the cost and complexity of the amplified femtosecond laser... Read more about Micromachining transparent materials using a femtosecond laser oscillator

Structural changes in borosilicate and fused silica glasses modified by a femtosecond laser at different laser repetition rates were investigated. The sample was submitted to femtosecond laser pulses at a rate ranging from 1 kHz to 25 MHz in the regime where the sample could experience from a rapid cooling to a cumulative heating respectively. Changes in the glass networks of the modified region were recorded via Raman microscopy using an Ar laser at 514 nm as an excitation. Due to fluorescence background in fused silica, relative peak intensities at 605 cm-1 800 cm-1 were observed for... Read more about Raman studies of micro-machine glasses with variable repetition rates

In this work, we investigated femtosecond laser micromachining in both poly(methyl methacrylate) (PMMA) and PMMA doped with the azoaromatic compounds Disperse Red 1 (DR1) and Disperse Red 13 (DR13). These compounds are particularly interesting due to their linear and nonlinear optical properties.