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Characterizing 1550 nm optical components down to 8 K.
- Source :
-
Cryogenics . Sep2024, Vol. 142, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Thermal noise sources are relevant for future gravitational wave detectors due to the foreseen increase in sensitivity, especially at frequencies below ▪. As most thermal noise sources scale with the square root of the temperature, cooling critical optical components and their suspension system is essential. This also requires a much wider range of temperature compatibility from all technology deployed in the last suspension stages, including displacement and inertial sensors. We demonstrate and characterize a setup for stable light sources and light intensity sensing for temperatures from 300 to ▪. Commercial collimators and fibers were tested to use light from stabilized laser sources in the cryogenic environment. We also investigated multiple semiconductor compositions of photodiodes and identified a solution with high and stable responsivity at ▪. • Study of the cryogenic compatibility of commercial optical components for 1550 nm. • Identification of collimators with stable light throughput from 8 to 300 K. • Investigation of different InGaAs photodiode semiconductor compositions. • Characterization of responsivity and dark current of photodiodes from 12 to 300 K. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00112275
- Volume :
- 142
- Database :
- Academic Search Index
- Journal :
- Cryogenics
- Publication Type :
- Academic Journal
- Accession number :
- 179274730
- Full Text :
- https://doi.org/10.1016/j.cryogenics.2024.103895