In this paper, a systematic approach is employed to design photonic crystal with boundary between positive and negative refraction boost the refractive properties of crystal. Mathematical techniques are turn process EFC engineering into nearly mechanical free trial-and-error steps. The designed demultiplexers operational characteristics then further improved by adding second an oblique boundary...

This paper presents the design and implementation of an Optical 4:1 Multiplexer using Sagnac Switches as Terahertz Asymmetric Demultiplexers (TOADs). multiplexers play a crucial role in modern communication systems by combining multiple signals onto single optical channel. The proposed multiplexer architecture leverages benefits Switches, such low insertion loss, high extinction ratio, crosstal...

This paper presents an accurate theoretical model for the study of concatenation of optical multiplexers/demultiplexers (MUXs/DMUXs) in transparent multiwavelength optical networks. The model is based on a semianalytical technique for the evaluation of the error probability of the network topology. The error-probability evaluation takes into account arbitrary pulse shapes, arbitrary optical MUX...

An ultrafast frequency domain optical coherence tomography system was developed at A-scan rates between 2.5 and 10 MHz, a B-scan rate of 4 or 8 kHz, and volume-rates between 12 and 41 volumes/second. In the case of the worst duty ratio of 10%, the averaged A-scan rate was 1 MHz. Two optical demultiplexers at a center wavelength of 1310 nm were used for linear-k spectral dispersion and simultane...

In this paper, two different node architectures for a high-speed packet-switched ring LAN based on the optical time-division multiplexing technique are proposed. Due to the incorporated low-speed packet headers the presented ring can be viewed as an optically (bit rate) transparent network. In both cases, the node can be implemented by using the current opto-electronic technology. Moreover, acc...

An efficient polarization beam splitter (PBS) based on an optofluidic ring resonator (OFRR) is proposed and experimentally demonstrated. The PBS relies on the large effective refractive index difference between transverse-electric (TE) and transverse-magnetic (TM) polarization states, since the silica-microcapillary-based OFRR possesses a slab-like geometry configuration in the cross section th...

Coarse wavelength division multiplexing (CWDM)-targeted novel silicon (Si)-nanowire-type polarization-diversified optical demultiplexers were numerically analyzed and experimentally verified. The demultiplexer comprised a hybrid mode conversion-type polarization splitter rotator (PSR) delayed Mach–Zehnder interferometric demultiplexer. Si-nanowire-based devices fabricated using commercially ava...

Wavelength demultiplexers based on photonic crystal resonators are attractive, since they may be realized in very small sizes. However, existing designs have a limitation on the size, since they all require one resonator for each wavelength and these resonators must be separated. As a possible approach to reduce the size further, we show that a single multimode resonator may be used to separate...

This paper presents a simulation methodology for performance assessment of wavelength division multiplexing (WDM) systems using directly modulated quantum-well lasers and optically preamplified direct detection receivers. The methodology is based on a pure semi-analytical method which combines noiseless WDM transmission simulation with noise analysis in those systems. Using this approach, we di...