The Fujikura FSM-50S is a core alignment fusion splicer engineered for precision splicing of single-mode, multi-mode, dispersion-shifted, and non-zero dispersion-shifted optical fibers. Operating across cladding diameters from 80 to 150 µm and coating diameters from 100 to 1000 µm, the unit delivers average splice losses of 0.02 dB for SM fiber and 0.01 dB for MM fiber, with return loss exceeding 60 dB. Splice completion occurs in approximately 9 seconds for SM fiber, with protection sleeve heating in typically 35 seconds.
## Technical Specifications
**Applicable Fiber Types**
• Single-mode (SM) — ITU-T G.652
• Multi-mode (MM) — ITU-T G.651
• Dispersion Shifted (DS) — ITU-T G.653
• Non-Zero Dispersion Shifted (NZDS) — ITU-T G.655
**Fiber Parameters**
• Cladding Diameter: 80 to 150 µm
• Coating Diameter: 100 to 1000 µm
• Cleaved Length: 8 to 16 mm (coating ≤250 µm); 16 mm (coating 250–1000 µm); optional set-plate for 8 to 16 mm across full coating range
**Splice Performance**
• Average Splice Loss: 0.02 dB (SM), 0.01 dB (MM), 0.04 dB (DS), 0.04 dB (NZDS)
• Return Loss: >60 dB
• Splice Time: ~9 seconds (SM fiber)
• Attenuation Splice Function: 0.1 to 15 dB in 0.1 dB steps
**Display & Optics**
• Dual CCD cameras with 5.6-inch TFT color LCD monitor
• Magnification: 295× (single view), 147× (dual view)
• Simultaneous X/Y fiber display capability
**Operational Modes & Memory**
• 40 user programmable modes; up to 60 reference modes
• Automatic fiber type identification
• Splice data storage: last 2000 results
**Heater & Protection**
• Protection sleeve heating: ~35 seconds (FP-03 sleeve)
• Compatible with standard and micro splice protectors (60 mm, 40 mm, micro series)
**Environmental**
• Operating Temperature: −10°C to +50°C
• Storage Temperature: −40°C to +80°C
• Automatic altitude compensation up to 3500 m
