Büchter Kai-Daniel F, Herrmann Harald, Langrock Carsten, Fejer Martin M, Sohler Wolfgang
Angewandte Physik, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany.
Opt Lett. 2009 Feb 15;34(4):470-2. doi: 10.1364/ol.34.000470.
Data-format-independent all-optical transmitter and receiver modules for free-space optical communications in the 3.8 mum region have been developed, essentially consisting of Ti-indiffused, periodically poled LiNbO(3) waveguides. Using these modules, conversion of C-band radiation to/from the mid-infrared (MIR) via difference-frequency generation was demonstrated. More than 10 mW of MIR power could be generated with the transmitter unit; the internal low-power conversion efficiency was 69%/W. A free-space MIR link was set up with a -41 dB fiber-to-fiber loss; only -15 dB are due to the parametric processes.
已开发出用于3.8μm区域自由空间光通信的数据格式无关的全光发射机和接收机模块，其主要由钛扩散的周期性极化铌酸锂（LiNbO₃）波导组成。利用这些模块，通过差频产生实现了C波段辐射与中红外（MIR）之间的转换。发射机单元可产生超过10mW的中红外功率；内部低功率转换效率为69%/W。建立了一个自由空间中红外链路，光纤到光纤的损耗为-41dB；其中只有-15dB是由参量过程造成的。
