Methods and systems for extending the range of fiber optic...

G - Physics – 01 – K

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G01K 11/32 (2006.01) G01J 11/00 (2006.01) G02B 6/26 (2006.01)

Patent

CA 2711223

Systems and methods for extending the range of a fiber optic DTS system are provided. In one respect, a method may provide steps for transmitting, in a first time period, an optical signal at a first energy level through an optical fiber, collecting backscatter signals as a result of the first transmission, adjusting the first energy level to a second energy level, transmitting, in an additional time period, the adjusted optical signal through the optical fiber, collecting backscatter signals as a result of the adjusted transmissions, and using a portion of the collected backscatter as a result of the first transmission and a portion of the collected backscatter as a result of the additional transmissions, determining one or more parameter profiles, such as a temperature profile.

L'invention porte sur des systèmes et sur des procédés pour étendre la plage de systèmes de DTS à fibre optique. Selon un aspect de l'invention, un procédé peut comprendre des étapes pour émettre, dans une première période de temps, un signal optique à un premier niveau d'énergie à travers une fibre optique, collecter des signaux de rétrodiffusion résultant de la première émission, ajuster le premier niveau d'énergie à un second niveau d'énergie, émettre, dans une période de temps supplémentaire, le signal optique ajusté à travers la fibre optique, collecter des signaux de rétrodiffusion résultant des émissions ajustées et utiliser une partie de la rétrodiffusion collectée à la suite de la première émission et une partie de la rétrodiffusion collectée à la suite des émissions supplémentaires, pour déterminer un ou plusieurs profils de paramètre, tel qu'un profil de température.

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