Abstract. In this paper, performance of incoherent and asynchronous optical CDMA (OCDMA) systems employing “optical encoding” is investigated and the results are compared with the results obtained when the encoding is performed in electrical domain. These investigations are performed for receiver structures that employ a single hard limiter (SHL), a double optical hard limiter (DHL) and also fo...

The overall thermal performance of a Parabolic Trough Collector (PTC) depends on its optical performance, particularly the uniformity of the irradiance distribution and the resultant optical efficiency of the collector. Local Concentration Ratio (LCR), optical efficiency and average light concentration are three fundamental parameters of the optical performance of a PTC. These parameters are af...

A transparentOptical-subTHz-Optical link providing record-high single line rates of 240 Gbit/s and 192 on a optical carrier over distances from 5 to 115 m is demonstrated. Besides direct mapping the 230 GHz subTHz-carrier frequency by means uni-traveling (UTC) photodiode, we demonstrate conversion data subTHz domain back plasmonic modulator. It shown that subTHz-to-optical upconversion c...

We study the problem of designing optical receivers to discriminate between multiple coherent states using coherent processing receivers—i.e., one that uses arbitrary coherent feedback control and quantum-noise-limited direct detection—which was shown by Dolinar to achieve the minimum error probability in discriminating any two coherent states. We first derive and re-interpret Dolinar’s binary-...

Three major analytical tools in imaging science are summarized and demonstrated relative to optical imaging in vivo. Standard resolution testing is optimal when infinite contrast is used and hardware evaluation is the goal. However, deep tissue imaging of absorption or fluorescent contrast agents in vivo often presents a different problem, which requires contrast-detail analysis. This analysis ...

In this paper, a 4-channel, 100 Gbps inductorless optical receiver analog front-end fabricated in 55 nm bulk-CMOS technology is presented. Active feedback technique widely adopted to improve the performance of without area-occupied inductors. To alleviate voltage headroom stress local loop traditional regulated cascode transimpedance amplifier, common gate amplifier inserted before source stage...

In an access network based on a passive optical network architecture, coherent detection is attractive since it allows for high receiver sensitivity coupled with inherent frequency selectivity. Nevertheless, solutions employed in core networks are prohibitively complex and costly, requiring the optical complexity of the coherent receivers to be reduced to make them feasible for access networks....

This work presents a performance evaluation based on elaborated analytical expressions of error probability for broadband access networkin the case of a combined technique of dense wavelength division multiplexing (DWDM) and one dimensional optical orthogonal codes (1D-OOC). Optical sources with relatively large spectrum has been considered and simulated.Besides the Multiple Access Interference...

This paper presents two highly integrated receiver circuits fabricated in InP heterojunction bipolar transistor (HBT) technology operating at up to 2.5 and 7.5 Gb/s, respectively. The first IC is a generic digital receiver circuit with CMOS-compatible outputs. It integrates monolithically an automatic-gain-control amplifier, a digital clock and data recovery circuit, and a 1 : 8 demultiplexer, ...