Skip to content
6CCVD Research

Wavelength-tunable femtosecond pulsed laser for the characterisation of solid-state sensors

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2025-10-01
JournalJournal of Instrumentation
AuthorsE. Ejopu, O. De Aguiar Francisco, Nawal Alā€Amairi, H.J. Li, M. Gersabeck

Abstract

Section titled ā€œAbstractā€

Abstract The Two-Photon Absorption (TPA) process provides an excellent method for the characterisation of solid-state sensors due to its intrinsic 3D resolution for the excitation of electron-hole pairs. This paper presents the commissioning of a system composed of a Light Conversion PHAROS laser read out with an ORPHEUS optical parametric amplifier with tuneable output wavelength across 310-16000 nm. This is one of the few facilities suitable for particle physics detector applications with a very wide wavelength range and ultra short pulses. The voxel characterisation shows a Rayleigh length of 12.20 Ā± 0.47 Ī¼m and the beam radius at the waist of 1.53 Ā± 0.04 Ī¼m. Initial measurements with silicon and diamond samples are described. The apparatus is characterised with both devices, demonstrating the expected quadratic dependency with the energy per pulse, and different models are presented to explain the signal generated due to reflection. The signal generated in the silicon diode is in good agreement with one dimension voxel model predictions.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2016 - Development of analog solid-state photo-detectors for Positron Emission Tomography [Crossref]
  2. 2023 - Characterisation of silicon detectors using the two photon absorption - transient current technique
  3. 2022 - Charge and temporal characterisation of silicon sensors using a two-photon absorption laser [Crossref]
  4. 2021 - Development of a two-photon absorption - TCT system and study of radiation damage in silicon detectors
  5. 2022 - Femtosecond laser studies of the Single Event Effects in Low Gain Avalanche Detectors and PINs at ELI Beamlines [Crossref]
  6. 2020 - Development of a Tabletop Setup for the Transient Current Technique Using Two-Photon Absorption in Silicon Particle Detectors [Crossref]
  7. 2022 - Characterisation of irradiated and non-irradiated silicon sensors with a table-top two photon absorption TCT system [Crossref]
  8. 2020 - SciPy 1.0-Fundamental Algorithms for Scientific Computing in Python [Crossref]

Reads Similar to This

Tunable continuous-wave terahertz generator based on difference frequency generation with DAST crystal Design, Fabrication and Evaluation of Diamond Tip Chips for Reverse Tip Sample Scanning Probe Microscope Applications Integrated Nonlinear Optical Resonators Based on AlN-on-insulator Platform