Fujikura FSM40PM

The Fujikura FSM-40PM is a precision fusion splicer engineered for polarization-maintaining (PM) fiber splicing in demanding optical applications. Built around proprietary sweep arc technology, it delivers minimal splice loss through wide-area heating—especially critical when joining dissimilar fibers with large mode field diameter (MFD) mismatch. The movable V-groove and Z-mechanism enable short cleave length operation across multiple coating diameters while maintaining high tensile strength, making it ideal for compact field deployments and laboratory environments.

## Technical Specifications

**Applicable Fiber Types**
• Single mode (SM), multimode (MM), dispersion-shifted (DS), non-zero dispersion-shifted (NZ-DSF), cut-off shifted (CS), erbium-doped (ED)
• Polarization-maintaining: PANDA, 3M Tiger™, Bowtie

**Cleave Length**
• Bare fiber clamping: 8–10 mm
• Coating clamping: 3–5 mm
• Fiber diameter range: 100–1000 μm (standard: 250 μm, 400 μm)

**Splice Loss (Typical)**
• SM (bare): 0.02 dB | SM (coating): 0.03 dB
• MM (either clamp): 0.01 dB
• DS fiber: 0.04–0.05 dB
• PANDA fiber: 0.06–0.07 dB
• Bowtie/3M Tiger™: 0.06 dB

**Splice Time**
• SM/MM: ~25 seconds
• DS/NZ-DS: ~40 seconds
• PANDA (bare): ~50 seconds
• 3M Tiger™ (bare): ~100 seconds

**Optical Performance**
• Return loss: > 60 dB
• Cross talk (PANDA, 0.6° angle): -40 dB
• Cross talk (3M Tiger™, 1.4° angle): -32 dB

**Mechanical**
• Tensile strength (coating clamp): ~2.5 GPa at 30 N
• In-line proof tester load: ~2 N
• Working stage height: 88 mm

**Software & Integration**
• 40 splice program modes with reference data
• RS232C interface for splice result download and parameter modification
• Power meter feedback capability
• Cross talk estimation via profile observation

**Protection Sleeves**
• 60 mm, 40 mm, and micro sleeves supported

## Key Features

• Sweep arc technology minimizes splice loss across dissimilar fiber pairs and PM combinations
• Movable V-groove and Z-mechanism facilitate short cleave splicing with high tensile strength
• Fiber holder system reduces operator-dependent variation
• Low-profile desktop form factor (88 mm stage height)
• Cross talk estimation function for PM fiber diagnostics

## Typical Applications

Optical amplifier assemblies, telecom backbone splicing, laboratory fusion work, EDFA module integration, and specialty fiber coupling where PM alignment and minimal loss are non-negotiable.