Passive Components

Mode Field Adapter (PM or Non-PM)

Mode Field Adapters (MFA) can be used for high power fiber lasers and fiber amplifiers. These devices can be used to connect two fibers with different core diameters and numerical apertures (NA). Lightel's MFAs utilize mode field optimization technology to obtain high transfer efficiency and low beam degradation.


  • High Power
  • High Transfer Efficiency
  • Custom Configurations Available
  • Stable and Reliable


  • High Power Fiber Lasers
  • Fiber Amplifiers
Parameter Specification
Port Configuration 1x1
Operating Wavelength 1030~1080nm or 1450~1600nm
SMA Fiber 6/125 10/125 10/125 6/125 20/250 62.5/125
LMA Fiber 10/125 20/125 25/250 20/400 30/250 105/125
Signal IL for Forward use 0.3 dB 0.4 dB 0.5 dB 0.5 dB 0.2 dB -
Signal IL for Reverse use 0.3 dB 0.5 dB 0.7 dB 0.7 dB 0.2 dB 2 dB
Total Power Handling 10W 50W 10W
Polarization Extinction Ratio ≥18dB for PM Fiber
Return Loss >45 dB
Pigtail Standard 1m or custom
Operating Temperature 0~75°C
Storage Temperature -40~85°C
Note 1: Values are referenced without connectors.
Note 2: Other package dimensions and optical performances available by request.