Efficient selection of focusing optics in non linear microscopy design trough THG analysis

Abstract

A theoretical and experimental study of the THG signal from a reference interface in confocal microscope allows precise analysis of beam propagation and optimization of the focusing objectives.

Optical properties of infrared femtosecond laser-modified fused silica and application to waveguide fabrication

“…More details concerning this technique can be found in Ref. 22. Third-harmonic generation has also been used to determine the ͑3͒ coefficient.…”

Optical Data Storage in Photosensitive Glasses and Spin State Transition Compounds

“…In our case, THG is excited with the same laser at low energy 10 nJ/pulse, but practically, a cheaper laser, such as a femtosecond ber laser, could be used. Indeed, with a minimum energy of 0.1 nJ and an irradiance of 10 10 W.cm − 2 (corresponding to an average power of 10 mW with a 100 MHz repetition rate), more than one third-harmonic photon by incoming pulse can be detected (Brocas et al, 2004). The damage threshold is achieved at an irradiance of 9 TW cm − 2 , which is delimited by a vertical dashed line.…”