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Nature of fiber-coupled detector responsivity measurements at 0.1% using a primary standard.
- Source :
-
Optics express [Opt Express] 2020 May 11; Vol. 28 (10), pp. 15331-15346. - Publication Year :
- 2020
-
Abstract
- We demonstrate the capability to measure the absolute power responsivity of optical fiber-coupled detectors at an expanded uncertainty of 0.1%, by direct comparison with a cryogenic primary standard. To facilitate synchronous power measurements, commercial all-fiber beam-splitters direct laser diode light simultaneously to the device under test and the primary standard. We investigate the use of single-mode, polarisation maintaining, and photonic crystal fibers to access the cryogenic standard, and report a reduction in the temperature dependent effective refractive index of these fibers of 0.1%, 0.15% and 0.3% respectively in going from room temperature to 5 K. We also evaluate the polarisation dependent loss of the beam-splitters, the stability of the beam-splitter ratio between the cryogenic detector and the device under test and the temporal and modal stability of the Fabry-Pérot laser diode sources. It is shown that the stability of the optical fiber beam-splitters limits the overall performance of the measurement system to an expanded uncertainty of 0.1%.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 28
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 32403563
- Full Text :
- https://doi.org/10.1364/OE.393064