| 摘要 |
A traveling wave, linearized, modulator device includes: an optical waveguide disposed on a substrate and consisting of an input-output portion, a terminal portion and a plurality of arms disposed between and connected to the other portions. A first arm has an optical characteristic that varies responsive to supplying of an electric field thereto. A reflector (e.g., mirror) located at the distal end of the terminal portion of the optical waveguide causes light entering the input-output portion and propagating through the waveguide to be reflected back through the waveguide so as to exit through the input-output portion. A traveling wave electrode structure disposed on the substrate terminates in an open circuit substantially at the distal end of the terminal portion of the waveguide. The electrode structure includes an electrode disposed on the first arm so as to supply an electric field to that arm responsive to an electrical voltage being supplied to the electrode. A radio frequency signal and a direct current bias are supplied to the first electrode such that the radio frequency signal is biased at a non-quadrature, preferably 104.5 degree, bias point providing minimum third-order distortion, thereby providing substantially linearized modulator operation.
|
