Low-loss 1/spl times/N multimode interference couplers with homogeneous output power distributions realised in silica on Si material

摘要

1/spl times/N multimode interference (MMI) couplers have been realised in silica on Si material. Fibre-to-fibre losses are 0.7, 0.9 and 1.3 dB with a maximal unbalance of 0.1, 0.2 and 0.5 dB for 1/spl times/2, 1/spl times/4 and 1/spl times/8 MMI couplers, respectively.