Dual InGaAs Photodiodes Having High Phase Linearity for Precise Timing Applications

We report highly linear InGaAs p-i-n dual photodiodes having a power-to-phase conversion factor of < 3.2 rad/W up to 1.5-V peak radio-frequency amplitude. These matched photodiodes, each having a 3-dB bandwidth of 22 GHz, demonstrate nearly identical performance leading to a differential power-to-phase conversion factor of < 1.5 rad/W.