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Birefringence axis rotation and nonlinear response of a side-hole fiber pressure sensor

Journal Article · · Applied Optics
DOI:https://doi.org/10.1364/AO.545718· OSTI ID:2568827
 [1];  [2];  [1];  [1];  [3]
  1. Nusenics LLC, Okemos, MI (United States)
  2. Univ. of Nebraska, Lincoln, NE (United States); Meta Reality Labs, Redmond, WA (United States)
  3. Univ. of Nebraska, Lincoln, NE (United States); Applied Materials, Sunnyvale, CA (United States)
+ Show Author Affiliations
The pressure-induced birefringence of side-hole fibers has been widely explored for hydrostatic pressure measurement. Here, this paper studies the effects of the initial birefringence of a side-hole fiber on the pressure response of polarimetric sensors based on side-hole fibers. A mathematical model, where the stress field induced by the pressure is assumed to be uniform in the core region of the fiber, was established to calculate the birefringence and optical axis rotation as a function of the differences between the two principal stress components of the stress field in the core region. Simulation results show that when there is misalignment between the initial birefringence axes and the principal axes of the stress field, pressure changes cause rotations of the birefringence axis, leading to complicated and nonlinear changes of birefringence as a function of pressure. Experiments were conducted using fiber-Bragg-grating-based resonators on side-hole fibers with different initial birefringence, and the results agree well with the simulation. The results underscore the importance of the control of magnitude and direction of the initial birefringence of the side-hole fiber and provide guidelines for the design and fabrication of side-hole fiber pressure sensors.
Research Organization:
Nusenics LLC, Okemos, MI (United States); Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0024040
OSTI ID:
2568827
Alternate ID(s):
OSTI ID: 2512414
Journal Information:
Applied Optics, Journal Name: Applied Optics Journal Issue: 5 Vol. 64; ISSN 2155-3165; ISSN 1559-128X
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (9)

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Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
Birefringence
Fiber Bragg grating
Fiber-optic sensor
Pressure
Temperature