| 摘要 |
<p>A photonic device (10) includes a waveguide portion (110) for guiding a photonic signal (60) and a means for controlling optical properties of the waveguide portion. The waveguide portion (110) is spliced between an input optical fibre (20) and an output optical fibre (30). The means for controlling optical properties may comprise an outer layer (120) of an electrooptic material having a variable refractive index which is switchable between a first refractive index and a second refractive index which characterises a first and a second state, respectively of the device (10). The outer layer (120) is sandwiched between an outer electrode (140) and an inner electrode (150). In use, switching of the refractive index changes the radial intensity distribution of optical modes in the waveguide portion (110).</p> |
