Chinese Optics Letters, 2014, 12 (11): 111401, Published Online: Oct. 31, 2014  

Low-cost and miniature all-silica Fabry–Perot pressure sensor for intracranial pressure measurement

Author Affiliations
1 Optoelectronics System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2 Key Laboratory of Structure Health Monitoring and Control of Hebei Province, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract
The monitoring of increased intracranial pressure (ICP) is necessary in the diagnosis and treatment of patients with neurological disease because it can provide an insight into the mechanism of the head injury. In this letter, we develop a novel miniature Fabry–Perot (F-P) sensor for ICP measurement. The proposed sensor is fabricated by using a commercially available fusion splicer and a fiber cleaver, by which many difficult art problems involved in fabrication are solved and the online monitoring of the F-P cavity is actualized. The sensor exhibits a linear response to the applied pressure over the range of 0–25 kPa (ample for ICP measurement), with a sensitivity of 10.18 nm/kPa, a resolution of 0.1 kPa, and a reduced thermal sensitivity of 0.068 nm/°C, which shows it can meet the requirements of ICP measurement.

Yuting Li, Wentao Zhang, Zhaogang Wang, Hongbin Xu, Jing Han, Fang Li. Low-cost and miniature all-silica Fabry–Perot pressure sensor for intracranial pressure measurement[J]. Chinese Optics Letters, 2014, 12(11): 111401.

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