Thermally Expanded Core Termination


  • Wide spectral operation range
  • Low insertion loss
  • Mode field diameter can be adjusted to Customer's order
  • Available as patchcords with connectors or pigtails
  • Available with any type of fiber optic connectors


  • Coupling light between two fibers with different NAs
  • Coupling light into fiber from free space
  • High power connectors
  • Fiber Laser
  • Fiber Optic Sensors

Technical parameters

Wavelength range [nm] 115501550155015501550
Mode field diameter [μm] 2,31520253035
IL [dB]

1. other wavelengths available upon request

2. measured @1550nm

3. other MFD’s available upon request

4. excess loss due to TEC side; additional insertion loss for connector side 0.2dB

5. calculated for specific MFD