Light Conversion T/PA Single-Shot Autocorrelator for Pulse-Front Tilt and Pulse Duration Measurements



Light Conversion's TiPA is an invaluable tool for alignment of ultrashort pulse laser systems based on the chirped pulse amplification technique. Its unique design allows monitoring and measuring of the pulse duration as well as the pulse front tilt in both vertical and horizontal planes. TiPA is a straightforward and accurate direct pulse‑front tilt measurement tool. Operation of TiPA is based on non‑collinear second harmonic (SH) generation, where the spatial distribution of the SH beam contains information on the temporal shape of the fundamental pulse.

This technique combines low background and single‑shot measurement capability. The basic idea is that two replicas of a fundamental ultrashort pulse pass non‑collinearly through a nonlinear crystal, in which SH generation takes place. SH beam’s width and tilt in a plane perpendicular to propagation provide information about the pulse duration and pulse front tilt. The SH beam is sampled by the included CCD camera.
TiPA comes with a user friendly software package, which provides on-line monitoring of incoming pulse properties.

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Light Conversion CARPET View Spectroscopy Data Analysis Software


Light Conversion's CarpetView is a software package dedicated for inspection, visua­lization and analysis of ultrafast spectroscopy data. It is compatible with various ultrafast spectrometers. It comes in two guises: classical view is dedicated to be used with pump‑probe and time‑resolved fluorescence datasets and 3D view is dedicated to be used with 2D electronic spectroscopy (2DES) and Fluorescence lifetime imaging (FLM) datasets.

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Light Conversion HARPIA-TF Femtosecond Fluorescence Upconversion & TCSPC Extension

harpia tf

Light Conversion's HARPIA‑TF is a time-resolved fluorescence measurement extension to the HARPIA‑TA mainframe that combines two time- resolved fluorescence techniques. For the highest time resolution, fluorescence is measured using the time-resolved fluorescence upconversion technique, where the fluorescence light emitted from the sample is sum-frequency mixed in a nonlinear crystal with a femtosecond gating pulse from the laser. The time resolution is then limited by the duration of the gate pulse and is in the range of 250 fs. For fluorescence decay times exceeding 150 ps, the instrument can be used in time-correlated single-photon counting (TCSPC) mode that allows for measuring high-accuracy kinetic traces in the 200 ps – 2 μs temporal domain. HARPIA‑TF extension is designed around the industry leading Becker&Hickl® time-correlated single-photon counting system, with different detector options available.

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Light Conversion HARPIA-TB: Third Beam Delivery Extension

harpia tb

When standard spectroscopic techniques are not enough to unravel the intricate ultrafast dynamics of photoactive systems, multi-pulse time-resolved spectroscopic techniques can be utilized to shed additional insight. Light Conversion's HARPIA‑TB is a third beam delivery unit for the HARPIA‑TA mainframe system that adds an additional dimension to typical time resolved absorption measurements. A temporally delayed auxiliary (third) laser pulse, as depicted below, can be applied to a typical pump-probe configuration in order to perturb the on-going pump-induced photodynamics.

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Light Conversion HARPIA-TA: Ultrafast Transient Absorption Spectrometer

harpia ta

The popular transient absorption spectrometer HARPIA from Light Conversion, has been reimagined and redesigned to meet the needs and standards of today's scientific world. The new improved HARPIA offers a sleek and compact design and together with intuitive user experience and easy day-to-day maintenance. Adhering to the standards raised by the OPRHEUS line of devices, the entire spectroscopic system is now contained in a single monolithic aluminum casing that inherently ensures excellent optical stability and minimal optical path for the interacting beams. In contrast to its predecessor, the dimensions of the device are greatly reduced. The area was reduced roughly by 2.6x, whereas volume was reduced by nearly 4x. The new HARPIA can be easily integrated with both PHAROS / ORPHEUS and Ti:Sa / TOPAS laser systems. Just like its precursor, it features market leading characteristics such as 10-5 resolvable signals along with other unique properties such as the ability to work at high repetition rates (up to 1 MHz) when used with PHAROS / ORPHEUS system. High repetition rate allows measuring transient absorption dynamics while exciting the samples with extremely low pulse energies (thereby avoiding exciton annihilation effects in energy transferring systems or nonlinear carrier recombination in semiconductor/nanoparticle samples).

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