Recent development on uni-traveling-carrier photodiodes and their applications

For ultrafast photodetectors, a high saturation power level is important, because the combination of a high-saturation-power photodiode and an optical fiber amplifier can eliminate the post-amplification electronics, extend the bandwidth, and thus simplify the receiver configuration. A wide linearity range is also important, especially for analog applications. The uni-traveling-carrier photodiode (UTC-PD), which has a unique mode of operation, is a promising solution for such requirements. In this paper, we describe recent progress in UTC-PD technologies