A new puke position modulation code division multiple access (PPM-CDMA) system is proposed for an indoor optical wireless channeL As a signature sequence for CDMA an optical orthogonal code (OOC) is used To reduce multiple access interference, two interference cancellation schemes are employed: decorrelating detection and successive interference cancellation (SIC). The bit error rate of the pro...

We developed an optical transceiver diode (TRAD) module for bi-directional time-compression-multiplexing (TCM) transmission systems. A wavelength-insensitive structure as a receiver and a low-capacitance configuration in the module provide a high sensitivity. Stable switching of 156 Mbit/s NRZ burst signals between the transmitter and receiver modes is achieved. In addition, it is shown that op...

Integrated photonics has emerged as an I/O technology set to disrupt the communication fabric of many-core computer systems. The optical technology uses wavelength-division-multiplexing and a high degree of integration in order to surpass electrical I/O in both throughput and energy by more than an order of magnitude. However, integrated photonic systems need to be properly designed in order to...

Passive optical matched-filtered detection (MFD) has been employed in many proposed optical pulse code division multiple access (CDMA) system implementations, driving the development of unipolar pseudo-orthogonal codes (incoherent). In this paper, coherent optical pulse CDMA systems based on coherent correlation detection (CCD) through homodyne correlation detection (HCD) and self-HCD directly ...

We have designed a 460 GHz FFO-driven integrated SIS receiver in which the signal is fed via a quasi-optical hybrid antenna feeding system. Since in such quasi-optical SIS receivers the contribution of the quasi-optics to the overall receiver noise is considerable, it is important to be able to analyze the antenna efficiency in order to optimize its coupling and improve the noise temperature of...