10-BIT CMOS OPTICAL LINK SYSTEM FOR SILICON VERTEX DETECTOR OF BELLE

An optical link system (OLS) is to be used in the data acquisition (DA Q) system for the Silicon Vertex Detector of the KEK B-factory experim ent (BELLE collaboration). In this study we report the 10-bit, or chan nel (ch), OLS in which CMOS ICs are used as the transceiver circuitry for both transmitting and receiving, infrared LEDs are used as photo t ransmitting devices, and Si PIN photodiodes (PDs) are used as photo-re ceiving devices. We have obtained a 32 Mbps/ch data rate, at around 5 dB of dynamic range, with less than 8 nsec of jitters and an error rat e of less than 10(-9). The scheme we proposed in this study has been c onfirmed assuming it will be used in the readout system.