Designed to support next-generation optical communications networks using 400 Gbit/s or 1 Tbit/s coherent detection-based optical transmission, u2t Photonics (Berlin, Germany) has developed what it says is the world’s fastest balanced photodetector, with a bandwidth of 70 GHz.
The optical front end of the BPDV3120R photodetector consists of a monolithically integrated balanced photodetector chip using waveguide-based indium phosphide (InP) technology to enable extremely high bandwidth. They are integrated onto a single InP chip and optimized to produce guaranteed linear frequency response, even at very high power levels. The coaxial single-ended output can detect up to 64 Gbaud polarization diversity x-QAM signals with repeatable common mode rejection ratio, linearity, and optical input power specifications for error-free operation in long-haul transmission systems at data rates of 400 Gbit/s and beyond. It can also be used in telecommunications test and measurement equipment. Contact Jens Fiedler at [email protected].