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Carina is a versatile fibre optic sensing system and comprises an advanced optoelectronics interrogator and sensing cables, which are equipped with the new family of engineered Constellation fibres; to gain two orders of magnitude more sensitivity (100x or 20dB improvement) over that achieved with standard fibres.
A transformative performance improvement has been achieved by advancing the state of the iDAS optoelectronics interrogator architecture, together with the introduction of new and proprietary Constellation fibre. This fibre is engineered to provide bright scatter centres along its length to capture and reflect more light back to the interrogator. This is achieved without introducing significant loss to the forward propagating laser pulses.
With Carina Sensing System, it is possible to achieve the massive coverage of distributed sensors without having to compromise on sensitivity.
This step change in performance is most acute in applications with low acoustic signal levels such as is common with leak detection, production monitoring and borehole seismic and microseismic applications where acoustic information can be present at, or below, the inherent system noise floor of the current technology and therefore difficult to detect.
In addition to standard singlemode and multimode optical fibres, a family of Constellation fibres can be incorporated into a number of different cable types for downhole and surface deployment. Silixa also offers an intervention solution using this technology where the fibres are integrated into a hybrid electric-line cable.