| 摘要 |
<p>A travelling wave optical modulator comprises a Z-cut lithium niobate substrate (4) on which is formed a proton exchanged optical waveguide (10) and a travelling wave electrode (18, 20). The optical waveguide (10) is removed from the electrode (18, 20) intermittently to bring an optical signal in the optical waveguide (10) back into phase with an electric field passing along the electrode (18, 20). The optical signal is delayed relative to the electric field thereby allowing modulation of the optical signal by a non-periodic electric field. The optical waveguide (10) is defined within the boundaries of the top surface of the substrate.</p> |
