A B C D E F G H I J K L M N O P Q R S T U V W X Y ZDecibel ScalesDefectsDifferential Group Delay (DGD)Distributed Temperature SensingDoping DensityDouble-Clad fiberDownhole Fiber Optic CableDownhole Fiber Sensor Downhole Fiber SensorAn optical based sensor that is designed to be used to measure an attribute in an O&G well.