INVESTIGATION OF ADJACENT CHANNEL CROSSTALK IN MULTICHANNEL MONOLITHICALLY INTEGRATED 1.55-MU-M PHOTORECEIVER ARRAYS

We have investigated adjacent channel crosstalk in 3-, 8-, and 16-chan nel InP-based monolithically integrated p-i-n/HBT photoreceiver arrays , with a channel bandwidth of 11 GHz, By using a novel monolithically integrated radiation shield, we have been able to reduce the crosstalk to -35 dB at 10 GHz, These parameters represent the best performance in multichannel integrated photoreceiver arrays, The two main componen ts of crosstalk are found to be radiation crosstalk and electrical cro sstalk and these are separately dependent on interchannel spacing and single-or dual-source biasing schemes. A electromagnetic full-wave sol ution shows that the measured crosstalk in arrays without the radiatio n shield could be dominated by radiation crosstalk, which can be model ed as a capacitive coupling between adjacent channels, Similarly, elec trical crosstalk can be modeled by equivalent parasitic resistive and inductive elements, Values of these circuit elements have been determi ned by analyzing experimental data.