Birefringent multi-peak optical reference element and birefringent sensor system
AssigneeWeatherford Technology Holdings, LLC
InventorDomino TAVERNER
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Abstract
Certain aspects of the present disclosure generally relate to an optical reference element having a wavelength spectrum comprising a plurality of wavelength functions having wavelength peaks spaced over a range of wavelengths, wherein adjacent wavelength functions are due to two orthogonal birefringence axes in the optical reference element. Aspects of the present disclosure may eliminate the drift issues associated with residual polarization and polarization dependent loss (PDL) with respect to grating-based sensor and reference element measurements.
Claims16
A reference optical sensor comprising a core with a modulated refractive index, wherein:
- in response to light introduced into the reference optical sensor, the modulated refractive index is configured to produce a wavelength spectrum comprising multiple pairs of wavelength functions having wavelength peaks spaced over a range of wavelengths;
- and
- adjacent wavelength functions in each pair are due to two orthogonal birefringence axes in the reference optical sensor.
Dependencies are inferred from the claim text.