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2. 发明公开

EP2600189A1 Electro-optical single-sideband modulator 审中-公开
标题翻译： Elektro-optischer Einseitenbandmodulator
公开(公告)号：EP2600189A1
公开(公告)日：2013-06-05
申请号：EP12195161.0
申请日：2012-11-30
申请人： Selex Sistemi Integrati S.p.A.
发明人： Dispenza, Massimiliano , Secchi, Alberto , Ricci, Massimo , Casagrande, Stefano , Evangelisti, Andrea , Della Rovere, Fabio
IPC分类号： G02F1/313
CPC分类号： H04B10/501 , G02F1/0356 , G02F1/3134 , G02F2201/05 , H04B10/5165
摘要： An electro-optical single-sideband modulator (1) comprising:
• an electro-optical substrate (2) ;
• a bimodal optical waveguide structure (3) formed in the substrate (2) to support different optical modes having associated optical frequencies (ω S , ω A ) and optical propagation constants (β S , β A ) and comprising an optical input (IN) to receive an input optical carrier signal having an optical frequency (ω S ), and a pair of optical outputs (OUT1, OUT2) to output corresponding SSB modulated optical signals, each having an optical frequency spectrum with a single side lobe; and
• an electrode structure (4) formed on the substrate (2) to receive an input electrical modulating signal having an associated electrical frequency (Ω) and electrical propagation constant (β Ω ), and to responsively apply an electrical field to the bimodal optical waveguide structure;
wherein the bimodal optical waveguide structure (3) and the electrode structure (4) are so formed that the optical propagation constants (β S , β A ) of the optical modes and the electrical propagation constant (β Ω ) of the electrical modulating signal meet a Phase Matching condition, according to which the optical propagation constant (β A ) of a first one of the optical modes is equal to the sum of the optical propagation constant (β S ) of a second one of the optical modes and the electrical propagation constant (β Ω ) of the electrical modulating signal, so resulting in the energy of the first optical mode being transferred at least partially to the second optical mode, and, as a consequence, in the optical frequency (ω A ) of the second optical mode being equal to the optical frequency (ω S ) of the first optical mode up-shifted of the electrical frequency (Ω) of the electrical modulating signal.
摘要翻译：一种电光单边带调制器（1），包括：电光基板（2）; （2）中形成的双峰光波导结构（3），以支持具有相关光学频率（ÉS，ÉA）和光传播常数（²S²A）的不同光模，并包括光输入（ IN）以接收具有光频率（ÉS）的输入光载波信号和一对光输出（OUT1，OUT2），以输出相应的SSB调制光信号，每个具有单个旁瓣的光频谱; 以及形成在所述基板（2）上的电极结构（4），以接收具有相关联的电频率（©）和电传播常数（²）的输入电调制信号，并且响应地将电场应用于所述双峰光波导结构; 其中双模光波导结构（3）和电极结构（4）被形成为使得光学模式的光学传播常数（2S，²A）和电调制信号的电传播常数（²）满足相位匹配条件，根据该相位匹配条件，第一光模的光传播常数（²A）等于第二光模的光传播常数（²S）和电传播电调制信号的常数（²），从而导致第一光学模式的能量至少部分地被传输到第二光学模式，并且因此在第二光学模式的光学频率（ÉA）中模式等于电调制信号的电频（©）上移的第一光学模式的光频率（ÉS）。

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