A long-standing open problem in quantum information theory is to find the classical capacity of an optical communication link, modeled as a Gaussian bosonic channel. It has been conjectured that this capacity is achieved by a random coding of coherent states using an isotropic Gaussian distribution in phase space. We show that proving a Gaussian minimum entropy conjecture for a quantum-limited ...

Arbitrary waveform generation has been widely used in optical communication, radar system and many other applications. We propose and experimentally demonstrate a silicon-on-insulator (SOI) on chip optical arbitrary waveform generator, which is based on Taylor synthesis method. In our scheme, a Gaussian pulse is launched to some cascaded microrings to obtain first-, second- and third-order diff...

The increasing popularity of optical communication has also brought a demand for a broader bandwidth. The trend, naturally, was to implement methods from traditional electronic communication. One of the most effective traditional methods is Code Division Multiple Access. In this research, we suggest the use of this approach for spatial coding applied to images. The approach is to multiplex seve...

The paper proposes a building equipment communications network based on a federation of existing standards and communications protocols. The proposed network concept provides a viable model for control manufacturers to provide advanced digital control of most building equipment. Keywordsbuilding equipment; lighting controls; networking; BACnet; IEEE P1451; IBECS; DALI; building controls; commun...

The group velocity dispersion (GVD) imposes severe limit on information carrying capacity of optical communication systems. By choosing appropriate pulse shape highly stable light pulses known as solitons are generated when effect of GVD is balanced by self-phase modulation (SPM). The application of solitons in communication systems opens the way to ultrahigh-speed information superhighways. Tr...

The rapid evolution of long-haul optical communications systems, witnessed in the last five years, is due to the gradual adoption of spectrally efficient, multilevel modulation formats, in conjunction with polarization division multiplexing (PDM) and coherent intradyne detection assisted by digital signal processing (DSP). The objective of this tutorial chapter is to briefly review the operatin...

This paper reviews recent work in the area of silicon photonic devices and circuits for monolithic and heterogeneous integration of circuits and systems on a chip. In this context, it presents fabrication results for producing low-loss silicon waveguides without etching. Resonators and add-drop distributed filters utilizing sidewall modulation fabricated in a single lithography and etching step...

Abstract—The use of optical technologies in the telecommunications has been increasing due to its ability to transmit large amounts of data over long distances. However, as in all systems of data transmission, optical communication channels suffer from undesirable and non-deterministic effects, being essential to know the same. Thus, this research allows the assessment of these effects, as well...

Performance characteristics are obtained for various optimum and suboptimum photocounting array receiver structures obtained in the preceding paper (Part 1). Probability of error curves are presented for the case of lognormal fading and for a variety of receiver configurations including the BPCM single-detector and array-detector processors and the BPOLM and BPIM single-detector processor. In a...

The refractive index (RI) is probably the single most important parameter in optical systems. Chromatic dispersion, on other hand, indicates how RI depends wavelength and central in, e.g., communication dispersion also plays an role when teaching optics due to captivating natural phenomenon of rainbow white light decomposition with a prism. In this work, we propose explore method characterize t...