Toptica has introduced its third-generation ultrafast fiber laser for spectroscopy and two-photon microscopy, the FemtoFiber ultra 920. The new laser system delivers laser pulses shorter than 100 fs at a central wavelength of 920 nm with more than 1.5 W of average output power.
Nonlinear microscopy has become a key technology in biological imaging enabling three-dimensional, noninvasive studies of biological tissue on the submicron scale. The new FemtoFiber ultra 920 is designed to meet the needs of the community for a reliable, compact and cost-effective solution. The laser features a pulse duration of <100 fs with a center wavelength of 920 nm and 1.5 Watt of average power (18.5 nJ at 80 MHz repetition rate). The unmatched temporal and spatial beam characteristics of the laser are fully tailored for deep-tissue nonlinear microscopy, providing excellent optical contrast and signal-to-noise.
The FemtoFiber ultra 920 provides a small laser head with a footprint of only 23 x 15.5 cm2. The laser head is designed to ensure minimum heat dissipation to its environment and therefore provides highest stability with respect to beam pointing. For more flexibility, the design also allows mounting the laser head into any integrators environment, even under various orientations (vertical/horizontal). The laser system comes with a 19“-type standard rack (3 units height) control and supply unit which is connected via detachable fiber and electronic lines of typ. 2 meters length.
The new laser is a great solution for applications in non-linear microscopy that are based on two-photon excitation of fluorescent proteins or rely on SHG-based contrast mechanisms. With an emission wavelength of 920nm, the laser is perfectly tuned to efficiently excite green and yellow fluorescent proteins (GFP, YFP), which are commonly used e.g. in neurosciences and other biophotonic applications. With that, this fiber laser perfectly closes the wavelength gap between the already existing FemtoFiber ultra systems at 780 and 1050 nm.
Toptica will be showcasing the FemtoFiber ultra 920 laser at its Booth (#3209) during BiOS/Photonics West 2020 from February 01 - 06 in San Francisco.