APPLICATION EVALUATION
Start with the complete manufacturing requirement.
- PM fiber geometry and coating dimensions
- Primary and outer layer balance
- Drawing and curing setup
- Optical and mechanical performance across the intended environment
PM fiber
Polarization-Maintaining Fiber Coating System
2616 · 3120
A dual-layer coating system for polarization-maintaining fiber, combining a low-Tg primary coating with a high-modulus protective outer coating.
Evaluation focus
- Stress buffering
- Mechanical stability across temperature
- Protection of PM fiber geometry
PM primary coating
2616
- Viscosity @25°C
- 3,000–4,000 mPa·s
- Tg by DMA
- ≤ −60°C
- Tensile modulus @23°C
- 1.1 MPa
- Elongation @23°C
- ≥35%
- Cured refractive index
- 1.478 @23°C
- Density @23°C
- 1.068 g/mL
PM outer coating
3120
- Viscosity @25°C
- 2,800–3,800 mPa·s
- Tg by DMA
- ≥110°C
- Tensile modulus @23°C
- ≥950 MPa
- Tensile strength @23°C
- ≥65 MPa
- Elongation @23°C
- ≥20%
- Cured refractive index
- 1.522 @23°C
RELATED TECHNICAL GUIDES
Plan the application before comparing materials.
TECHNICAL FAQ
Questions for application planning
Why does the system use two coating layers?
The 2616 primary coating provides a low-modulus inner layer, while 3120 provides a high-modulus protective outer layer.
How should refractive-index values be compared?
Compare values measured at consistent wavelength, temperature and material-state conditions.
What should be provided for a PM coating discussion?
Provide the PM fiber structure, coating dimensions, drawing and curing setup, intended environment and qualification tests.
