China 
Africa 
Explore chapters and articles related to this topic
Splicing of Fibers
Published in Hiroshi Murata, Handbook of Optical Fibers and Cables, 2020
Figure 46 shows the fully automatic fusion splicing machine for an eight-fiber ribbon. Features: The eight fibers in ribbon are spliced automatically. Splicing time for 8 fibers is about 3 min (about 1/3 the time when compared with an ordinary mass fusion splicing machine).Machine Main body Width 260 mm × Depth 230 mm × Height 250 mm Weight 18 kgController 198 294 156 4.2Splicing loss SM: average 0.04 dB; maximum 0.25 dB
Raman-Based Distributed Temperature Sensors (DTSs)
Published in Arthur H. Hartog, An Introduction to Distributed Optical Fibre Sensors, 2017
In addition, operational considerations frequently dictate the use of connectors that after a few mating/ de-mating cycles may have degraded in their loss or become more reflective through incorrect maintenance during operation; even when installation conditions allow fusion splicing (by far the best option if available), poor working conditions (cramped, dusty or fibre leads that are too short for many attempts at a good splice), rushed timescales or indeed mismatches in fibre dimensions may cause losses well above those that are theoretically achievable. The incremental losses from imperfect connections and fibre quality below the very best that is available often degrades the performance that is achieved in practice with DTS systems.
Optical Fibers and Accessories
Published in Daniel Malacara-Hernández, Brian J. Thompson, Advanced Optical Instruments and Techniques, 2017
Fusion splicing provides the lowest connection loss, keeping losses as low as 0.05 dB. Also, fusion splices have lower consumable costs per connection than mechanical splices. However, the capital investment in equipment to make fusion splices is significantly higher than that for mechanical splices. Fusion splices must be performed in a controlled environment, and should not be done in open spaces because of dust and other contamination. In addition, fusion splices cannot be made in an atmosphere that contains explosive gasses because of the electric arc generated during this process.
High sensitivity liquid surface deformation sensor based on cascaded Bowknot Type Tapers
Published in Journal of Modern Optics, 2019
Shaojie Shuai, Yike Xiao, Huitong Deng, Zhiqiang Sun, Jiaqi Gong, Zexu Liu, Jiahao Fang, Jing Yu, Tingting Lang, Chunliu Zhao, Changyu Shen
Figure 1 shows the experimental setup and the structure of the sensing head, respectively. A broadband source (BBS) with the wavelength range of 1420∼1620 nm was utilized as the input light. The output spectrum of the proposed structure was detected by an optical spectrum analyzer (OSA: AQ6370, YOKOGAWA, Japan) with a wavelength resolution of 0.05 nm. The camera and computer recorded the images of the liquid surface deformation. Figure 1(b) shows the partial enlarged drawing of the MZI. For the symmetric structure of the BTT, as the light propagating through this taper, due to the little sphere on the centre of the BTT, the light from the left side of the taper will be coupled into the little sphere, and then be coupled into the fibre core of the right side of the taper. It is benefit to control the intensity distribution of fibre core and cladding of the fibre. Figure 1(c) is the picture of the BTT showing on the screen of the fusion splicer. The length of the fibre between the two BTTs is 1.0 cm. The core and cladding diameters of the SMF is 9 and 125 µm, respectively. The BTT was fabricated under modified parameters with a commercial electric-arc fusion splicer by using an insufficient-tapered fusion splicing method (18).
Dual determination of strain and temperature using cascaded fiber Fabry–Perot interferometers with wavelength and phase demodulation
Published in Instrumentation Science & Technology, 2023
Yang Yu, Yuan-xin Li, Feng Xia, Bo Liu
Figure 1b shows an image of the sensing structure. The short HCF and the SMF are 76 μm and 173 μm in length. The inner diameter of the HCF is 50 μm and the outer diameter of the HCF is 125 μm. The fusion splicing program with an arc power of 70 unit and arc duration of 390 ms was adopted to complete the non-collapse splicing between SMF and HCF. The fabrication repeatability is guaranteed by the use of a precise fiber length cutting and fiber fusion splicing system, which consists of an optical fiber cutter, an optical fiber fusion splicer, two elevator-platforms, a three-dimensional micro-displacement platform, and a pulley and a weight.