Topas
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LIGHT CONVERSION FEATURES Travelling wave single crystal, four amplification stage configuration TOPAS features the best performance available on the world market during the last years, being the best selling device since 1995. It has attracted much Energy conversion into the parametric radiation ~30-35% fundamental and technological interest from the very beginning because of the flexibility of its optical scheme, extremely large tuning range, and the possibility of scaling up to a high-power output. TOPAS can be easily adopted to be driven by a variety of laser systems, with pulse widths ranging from 20 fs Angular tuning limited by crystal transparency range only The tuning range of TOPAS is restricted mainly by the pump wavelength and Grating frequency selector IR-absorption edge of the particular nonlinear crystal (BBO or LBO). This range is notably extended by the frequency up- and down-conversion of the TOPAS output. Different frequency mixing schemes allow for continuous tuning across Upgradability for pump energy, the whole accessible wavelength range and for generation of several wavelength and pulse width synchronous pulses at different wavelengths. The operation of TOPAS has been tested when pumped with 200-fs and 1-ps Computer controlled operation second-harmonic pulses of Nd:glass laser, 8-30 ps third-harmonic pulses of Nd:YAG laser, 20-fs to 5-ps fundamental and 0.5-3 ps second-harmonic pulses of Ti:saphire laser. In all the cases energy conversion into the parametric Optional frequency mixers radiation up to 20-40% was achieved. An important feature of TOPAS design is that it can be matched to pump sources with peak power ranging over orders of magnitude. The minimum 150 fs pump pulse energy ensuring > 15% parametric conversion is around 80 mJ. There are no limitations for pulse repetition rate up to several kilohertz.

ACCESSORIES Grating Output Frequency doubling and mixing Deep-UV and mid-IR wavelength extensions TOPAS consists of an independently pumped superfluorescence generator, two Narrow-bandwidth generation preamplifiers, and power amplifier. All these stages are geometrically arranged using a single nonlinear crystal. The seed signal is produced in low-energy Wavelength separators preamplifiers, that are optimized for the best spectral and spatial filtering properties. The power amplifier uses >90% of the pump energy and is adjusted for high conversion efficiency along with the beam quality and...