| 摘要 |
<p>An optical modulator 1 has an optical input signal waveguide 2, first and second interferometric waveguide arms 6, 8, a modulated output signal waveguide 12, a splitter 4 for dividing the input optical signal between the first and second arms 6, 8, and a combiner 10 for re-combining the signals transmitted along each of the first and second arms 6, 8 into the output signal waveguide 12. The modulator 1 further has first and second electrodes 14, 16 each of a segmented structure having a plurality of elements 18, 20 each extending from a respective one of the first and second electrodes 14, 16. The elements 18, 20 of each of the first and second electrodes 14, 16 each have a first part 30, 32 positioned such as to have an electro optic effect on a signal transmitted through the corresponding one of the first and second arms 6, 8 and at least a proportion of the elements 18, 20 of the first electrode 14 each have a second part 34 positioned such as to have limited or no electro optic effect on a signal transmitted through the first arm 6.</p> |
