Open AccessSensors for Terahertz Spectroscopy and Quantum Cascade Lasers
Author(s) -
Dröscher Susanne,
Gonnert Manfred
Publication year - 2015
Publication title -
optik & photonik
Language(s) - English
Resource type - Journals
eISSN - 2191-1975
pISSN - 1863-1460
DOI - 10.1002/opph.201500001
Subject(s) - laser , terahertz radiation , cascade , far infrared laser , quantum cascade laser , photomixing , optoelectronics , optics , spectroscopy , physics , wavelength , tunable laser , materials science , chemistry , terahertz metamaterials , quantum mechanics , chromatography
High‐precision laser power measurement plays a crucial role in many laser applications, be it in the lab or in industrial settings. Only if the power of a laser can be measured precisely, the laser can be used correctly. The precise measurement of infrared lasers, for example quantum cascade lasers, and terahertz radiation used to be challenging because of a lack of adequate measurement tools. A novel measurement solution developed by Thorlabs GmbH now closes this gap. In collaboration with greenTEG AG, an ETH Zurich spin‐off, Thorlabs developed a measurement head, which detects the power in the low μW‐range independently of the wavelength of the laser. A low rise time of less than a second guarantees fast measurement results.