Abstract
Unbalanced multimode interference (MMI) couplers are optical integrated components widely used in photonic integrated circuits. Couplers with two fixed coupling ratios: 85/15 and 15/85 are studied in this paper. Low-loss MMI couplers are designed and fabricated. Excitation of the first-order mode in access waveguides of MMI couplers can influence the excess losses and the coupling ratio of these components. The effect of the first-order mode excitation was simulated and confirmed by the experimental results, which are presented in this paper.
Original language | English |
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Pages (from-to) | 1882-1884 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 16 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2004 |