Distributed Temperature Sensor Achieved Sensing Limit of 48 K
ID Quantique (IDQ) are excited to announce the results of a recent collaboration. The title of the resulting paper is, “Cryogenic temperature 3D mapping via a distributed temperature sensor with centimeter resolution.” This paper demonstrates a spatial mapping of temperatures below the liquid nitrogen boiling point. IDQ’s Raman-based distributed temperature sensor achieved a lower temperature sensing limit of (48 ± 2) K. This result occurred due to the high efficiency and low dark count rates of IDQ’s SNSPDs.
The Abstract of this paper states:
We conduct 3D mapping of cryogenic temperatures via a Raman-based distributed temperature sensor, employing standard telecom single-mode fibers and polarization-independent superconducting nanowire single photon detectors (SNSPDs). By coiling a test fiber around various stages of a liquid helium cooled cryostat, our device demonstrates a lower temperature sensing limit of (48 ± 2) K, below the nitrogen boiling point. This achievement is made possible by the low dark count rates of SNSPDs, as validated by theoretical simulations. Furthermore, we utilize our device to map cryogenic temperatures on the 350 cm2 surface of a specially designed hollow cylindrical aluminum sample, accommodating approximately 2 m of standard single-mode optical fiber. During nitrogen cooling, we monitor the temporal evolution of the spatially dependent temperature gradient on the metallic sample with a temporal sampling down to one minute. Fiber-based distributed temperature sensing with centimetric spatial resolution can be effectively applied for 3D mapping at cryogenic temperatures of superconducting, quantum computing and aerospace instrumentation.
Equipment from ID Quantique (IDQ) used in the experimental setup for this paper:
- ID900 – Time to Digital Controller (TDC)
(Note: ID1000 Series now supersedes the ID900.) - ID281 – Superconducting Nanowire Single-Photon Detectors (SNSPD)
About ID Quantique
ID Quantique‘s (IDQ) Quantum Sensing business unit provides photon counting solutions for the visible and near infrared regions of the optical spectrum, pulsed laser sources, counting & timing electronics and photonic sensing solutions for both industrial and research applications in various domains, such as quantum physics, communication, biological and material sciences, defense and security, oil and gas, etc.
To request more information or a quotation for any ID Quantique products, contact IL Photonics.