Abstract: Example embodiments may relate to an apparatus, method and/or computer program for managing timing advance loops. The method may comprise receiving, at a user equipment from a plurality of network nodes, respective downlink reference signals, wherein an antenna system of the user equipment receives the downlink reference signals using a wide beam configuration. The method may also comprise performing measurements on the received downlink reference signals to determine a parameter and for determining that the parameter does not meet a predetermined criteria. Based on the parameter not meeting the predetermined criteria, the method may comprise configuring the antenna system such that at least one of the downlink reference signals is received using a narrow beam configuration. The method may involve re-performing the measurements on downlink reference signals from the plurality of network nodes.

Abstract: The invention relates to a tapered optical fiber and a method and drawing tower for producing such an optical fiber. The tapered optical fiber comprising a core region that is capable of guiding light along a longitudinal axis of said optical fiber and a cladding region surrounding said core region. The optical fiber comprises a tapered section arranged between a first longitudinal position and a second longitudinal position, said tapered section comprising a first taper section having a first length, L1, over which the optical fiber is tapered down to a taper waist, and a second taper section having a second length, L2, over which said optical fiber is tapered up.

Abstract: The invention relates to a tapered optical fiber and a method and drawing tower for producing such an optical fiber. The tapered optical fiber comprising a core region that is capable of guiding light along a longitudinal axis of said optical fiber and a cladding region surrounding said core region. The optical fiber comprises a tapered section arranged between a first longitudinal position and a second longitudinal position, said tapered section comprising a first taper section having a first length, L1, over which the optical fiber is tapered down to a taper waist, and a second taper section having a second length, L2, over which said optical fiber is tapered up.