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Tunable Laser Source from Photon etc
Photon etc.'s Tunable Laser Source (TLS) combines a supercontinuum source (broadband light) and a widely Laser Line Tunable Filter (LLTF). The TLS features a unique optical filtering technology that provides exceptional out-of-band rejection capabilities. This technology is crucial for the development of tunable excitation sources utilized in cutting-edge spectroscopic techniques where spectral purity is imperative. Moreover, this versatile tool is ideal for characterizing the spectral response of optics and optoelectronic devices.
Key Features
The key features of the Tunable Laser Source are:
LLTF Contrast
The LLTF Contrast acts as a filter for the tunable laser source.
LLTF Contrast - Photon etc
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].
|
Technical Specfications |
TLS VIS |
TLS-SWIR |
| Standard Tuning Range* | 400 to 1000 nm | 1000-2300 |
| Bandwidth (FWHM) | 1.5-2.7nm | 2.0-5.0 nm |
| Wavelength Absolute Accuracy | FWHM/8 | |
| Beam Diameter | 2 to 3 mm | |
| Coherence Length | 50 µm @ 400 nm; 300 µm @ 1000 nm (for FWHM < 2 nm) | |
| Polarization | Unpolarized | |
| Grating Damage Threshold | > 100 kW/cm2 average power> 5 GW/cm2 peak power @ 1064 nm, 8 ns | |
| Aperture Diameter | = 5 mm | |
| Operating Temperature | 10 to 40°C | |
| Software | PHySpec™ included | |
| Computer Connection | USB 2.0 (compatible 1.1) | |
| Power Supply | 100 - 240 V, 50 - 60 Hz | |
|
* custom tuning ranges available upon request. |
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