PM Coupler

Mode field is different in fibers with different core diameter and NA. Splicing loss is large between two fibers with different mode field. In order to reduce splicing loss, mode field must be similar. Mode Field Adaptors is designed to makes two fiber’s mode field match well. These devices can also be used to absorb residual pump light in the reverse direction, preventing damage to the seed or isolator. Custom Mode Field Adaptors can be designed to meet a wide range of fiber types. 

 (6+1)X1 Pump and Signal Combiner (2+1)x1 Pump and Signal Combiner  Mode Field Adapter 
(6+1)X1 Pump and Signal Combiner (2+1)x1 Pump and Signal Combiner Mode Field Adapter
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