Analysis of optical crosstalk within optoelectronic integrated circuits including lasers and photodetectors

Optical crosstalk from a 1.3 mum laser to a 1.55 mum photodiode on a single InP substrate, and its suppression within 1.3 mum/1.5 mum Y-junction trans ceiver OEICs, has been analyzed experimentally. The results indicate that t he optical crosstalk suppression is limited by the accumulated light in the OEIC substrate coming mainly from the spontaneous emission of the integrat ed laser and from stray light at the laser-waveguide butt joint interface. For OEICs, integrating lasers and photodetectors, the achievable optical in tra-chip crosstalk at present will be in the range of 30-40 dB at the requi red small die dimensions.