High Power Fiber Optical Components
Fiber Mode Field Adapters
Standard splice between two asymmetric fiber geometries can lead to high insertion loss and degradation of the beam quality. A mode field adapter overcomes this using an adiabatic taper between the two fibers to gradually expand or compress the mode field to achieve maximum signal transmission and M2 beam quality. Our Mode Field Adapters efficiently expand the mode field of an SM optical fiber or large-mode-area (LMA) fiber to match the LP01 mode of a larger LMA fiber. The PM Mode Field Adapter similarly expands the mode field of a PM optical fiber to match the LP01 mode of a polarization-maintaining LMA (PLMA) fiber while maintaining a high PER. These devices are bidirectional and can also be used in reverse to compress the mode field when the output end is used as an input. We offer standard configurations for most application scenarios.

Need this configured?
Share your wavelength, fiber type, connector, power handling and control requirements and we will qualify the matching configuration and part number.
Model selection
Nearby series comparison
Compare Fiber Mode Field Adapters with the closest available models in the High Power Fiber Optical Components family. Confirm option-dependent values on the final configuration before ordering.
| Selection parameter | Fiber Mode Field Adapters (current) | Fiber Inline Polarizers/Rotators | High Power Fiber Collimator Long Distance to 100m |
|---|---|---|---|
| Wavelength range | Confirm for this model | Confirm for this model | 1060, 2000, 1310, 1480, 1550, 1625, 780, 850, 980, 850/1310, 1260~1620, 1310/1550, 350, 530 |
| Optical performance | Confirm for this model | Confirm for this model | Confirm for this model |
| Fiber type | Confirm for this model | Confirm for this model | SMF28, PM1550, SM1950, PM1950, Hi1060, PM980, Hi780, PM850, 105/125μm |
| Connector / control | Confirm for this model | Confirm for this model | None, FC/PC, FC/APC, SC/PC, SC/APC, ST/PC, LC/PC, SMA905, LC/UPC, Special |




