Abstract: The invention relates to a method and device for fiber optic temperature measurement. The invention also relates to a multimode quartz glass fiber with nanocomposite (NK) containing a polymer and quantum dots (QDs) and its manufacture. These are based on temperature-dependent emission of quantum dots on the surface of optical fibers.

Abstract: A sensing device (10) for a high voltage disconnecting switch (20). The sensing device (10) comprises: a first optical fiber (110) configured to receive light from an optical source (100) and configured to guide the light; an optical collimator (120) coupled to the first optical fiber (110) to receive the light guided in the first optical fiber (110) and configured to collimate the light into a collimated light beam; a bendable optical component (130) coupled to the optical collimator (120) to receive the collimated light beam and configured to guide the collimated light beam, wherein the bendable optical component (130) is configured and arranged to bend depending on a switching state of the high voltage disconnecting switch (20), thereby influencing the collimated light beam; and a deriving unit (160) configured to derive information about the switching state of the high voltage disconnecting switch (20) based on the collimated light beam.

Abstract: A sensing device for a high voltage disconnecting switch comprises a light emitting element, which is configured to align its temperature with a temperature of the high voltage disconnecting switch, and an optical fiber, which is configured to receive a light emission from the light emitting element and configured to guide the light emission. Further, a deriving unit is configured to receive the light emission from the optical fiber and derive information about the temperature of the high voltage disconnecting switch based on a duration of the received light emission.

Abstract: The present disclosure relates to a system for determining a position of a movable arm of a high voltage disconnecting switch. The system comprises a high voltage disconnecting switch with a movable arm for opening and closing the high voltage disconnecting switch and a time of flight sensor configured to determine a distance value indicating a distance between the time of flight sensor and the movable arm. The system further comprises a control device configured to determine, based on the distance value, whether the high voltage disconnecting switch is in an open state or in a closed state. Further, a method for determining a position of a movable arm of a high voltage disconnecting switch is provided.

Abstract: A fiber insulator (100) with a fiber optical cable (200) is provided. The fiber insulator (100) comprises a fiber optical cable (200); a ceramic jacket (120), wherein the ceramic jacket (120) is hollow, wherein the ceramic jacket (120) has an inner whole diameter (D) configured to guide the fiber optical cable (200); an insulating filling material (130), which at least partially fills out the ceramic jacket (120) and is arranged between the fiber optical cable (200) and the ceramic jacket (120), wherein the insulating filling material (130) has thermal properties similar to the thermal properties of the fiber optical cable (200) and the ceramic jacket (120), and wherein at least one end of the fiber insulator (100) is closed by at least one end cap (151, 152).