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Fluid diffusion resistant glass-encased fiber optic sensor

  • US 6,626,043 B1
  • Filed: 01/31/2000
  • Issued: 09/30/2003
  • Est. Priority Date: 01/31/2000
  • Status: Expired due to Term
First Claim
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1. A pressure sensor for detecting an external pressure, comprising:

  • an optical fiber comprising a cladding and a core, wherein the core includes an optical pressure sensor, a unitary quartz shell encasing the optical fiber and for transmitting the external pressure to the optical pressure sensor; and

    a non-polymeric coating formed on at least an external surface of the shell to prevent moisture ingress from affecting the pressure sensor.

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