Tunable Laser Source from Photon etc

LLTF Contrast

The LLTF Contrast acts as a filter for the tunable laser source.

LLTF Contrast - Photon etcPlay

Applications

Characterization of dielectric thin film filters (OD of up to 12) [1]

A transmittance measurement setup using Photon etc. Laser Line Tunable Filter (LLTF) is employed to obtain spectrally resolved characterization of dielectric thin film filters with optical densities from 0 to 12 in a spectral range covering 400 nm to 1000 nm.

Time-resolved photoluminescence (TRPL) on photovoltaic materials [2]

Metastable defects in CIGS solar cells can be characterized with time-resolved photoluminescence (TRPL). TRPL is a technique where the sample is excited with a pulsed light and the luminescence signal decay is analyzed as a function of time. The excitation source is produced by combining a supercontinuum source with an LLTF (ps resolution achieved).“The developed contactless characterization method was compared with classical current–voltage measurements. TRPL leads to a more complete understanding of the physics of metastable defects in terms of quantifying the shift in minority charge carriers dynamics that it induces.”

Spectral Response of Photodetectors

The outstanding out-of-band rejection and the wide spectral range covered by the LLTF (400-1000 nm VIS, 1000-2300 nm SWIR, 400-2500 nm EXT IV) allow the precise calibration of a vast array of photodetectors including CCD, EMCCD, sCMOS, InGaAs, MCT and more. In addition to focal plane arrays, the LLTF can be used to calibrate single-pixel detectors such as photodiodes (APD, SPD, etc.), photomultiplier tubes (PMTs), or any other photosensitive device within this spectral range.

[1] Lequime, M., Liukaityte, S., Zerrad, M., & Amra, C. (2015). Ultra-wide-range measurements of thin-film filter optical density over the visible and near-infrared spectrum. In Optics Express (Vol. 23, Issue 20, p. 26863). The Optical Society. https://doi.org/10.1364/oe.23.026863[2] El-Hajje, G., Ory, D., Paire, M., Guillemoles, J.-F., & Lombez, L. (2016). Contactless characterization of metastable defects in Cu(In,Ga)Se 2 solar cells using time-resolved photoluminescence. In Solar Energy Materials and Solar Cells (Vol. 145, pp. 462–467). Elsevier BV. https://doi.org/10.1016/j.solmat.2015.11.016

Contact Photon etc. for more information on these applications:[email protected].