Eight-element polarisation independent transmission trap detector with high attenuation
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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9
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Metrologia, Volume 62, issue 1
Abstract
A polarisation-insensitive transmission trap detector was constructed from two identical polarisation-dependent transmission trap detectors, each containing four 10 mm × 10 mm silicon photodiodes. The performance of the 8-element polarisation-independent and coaxial input-output transmission trap detector has been characterised at laser wavelengths of 635 nm and 850 nm. The measured transmittances are lower than 10−4 and are in agreement with values calculated from the reflectances of single photodiodes. The measured relative transmittances and responsivities are independent of polarisation within 0.12%. The spectral responsivity is spatially uniform within 0.1% across an area of 4 mm × 4 mm , consistent with the expected variations due to the oxide layer thickness of the photodiodes.Description
Publisher Copyright: © 2025 The Author(s). Published on behalf of BIPM by IOP Publishing Ltd.
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Vaigu, A, Kubarsepp, T & Ikonen, E 2025, 'Eight-element polarisation independent transmission trap detector with high attenuation', Metrologia, vol. 62, no. 1, 015008. https://doi.org/10.1088/1681-7575/ada7fd