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  _____    _    _     _  _    _    _    __   __  
 / ____|| | || | ||  | \| || | || | ||  \ \\/ // 
/ //---`' | || | ||  |  ' || | || | ||   \   //  
\ \\___   | \\_/ ||  | .  || | \\_/ ||   / . \\  
 \_____||  \____//   |_|\_||  \____//   /_//\_\\ 
  `----`    `---`    `-` -`    `---`    `-`  --`

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Text this: Temperature sensor by using selectively filled photonic crystal fiber Sagnac interferometer