The Fujikura BISM15-PX-U25D-H is a bend-insensitive polarization-maintaining PANDA fiber spool engineered for demanding optical applications requiring precise polarization control and minimal signal loss. The fiber features a symmetrical cross-section with uniform stress-applying parts that deliver superior polarization maintenance, low polarization crosstalk, and exceptional bend performance down to 7.5 mm radius. This combination enables integration into miniaturized optical systems while maintaining signal integrity across extended transmission distances.
## Technical Specifications
• **Fiber Type:** PANDA (Polarization-maintaining AND Depression Added)
• **Wavelength Band:** 1550 nm band
• **Mode Field Diameter (MFD):** 9.0 ± 0.4 μm @ 1550 nm
• **Cladding Diameter:** 125 ± 1 μm
• **Coating Diameter:** 245 ± 15 μm
• **Concentricity Error:** ≤ 0.5 μm
• **Attenuation:** ≤ 3.0 dB/km @ 1550 nm
• **Cutoff Wavelength:** ≤ 1440 nm
• **Polarization Crosstalk:** ≤ -30 dB/100 m @ 1550 nm
• **Beat Length:** ≤ 3.0 mm @ 1550 nm
• **Minimum Bending Radius (2% proof test):** 7.5 mm
• **Bending Attenuation (Φ15 mm × 10 turns):** ≤ 0.2 dB @ 1550 nm
• **Bending Polarization Crosstalk (Φ15 mm × 10 turns):** ≤ -30 dB @ 1550 nm
• **Proof Test Level:** ≥ 2%
• **Coating Material:** UV curable resin, UV curable resin/Polyester elastomer
• **RoHS Compliant:** Yes
## Key Features
• Bend-insensitive design (BISM designation) tolerates compact routing without performance degradation
• Maintains polarization state through engineered stress-applying geometry
• Low crosstalk across bending and straight configurations
• Minimal attenuation supports long-distance propagation
• Broadband compatibility with fusion splicing and optical connectors
## Typical Applications
• Laser diode and modulator pigtails
• Polarization-dependent optical devices
• Pump laser stabilizers (0.98 μm or 1.48 μm)
• PMD compensators in high-speed transmission systems
• Fused coupler manufacturing
• Ultra-high-speed optical transmission
• Fiber-based sensing systems
• Miniaturized optical component integration
