Results of optical frequency transfer over a carrier-grade dense-wavelength-division-multiplexing (DWDM) optical fiber network are presented. The relation between soil temperature changes on a buried optical fiber and frequency changes of an optical carrier through the fiber is modeled. Soil temperatures, measured at various depths by the Royal Netherlands Meteorology Institute (KNMI) are compa...

It is usually believed that the blocking probability of a switching network will increase with the increase of the failure rate of building components (e.g., links, switching elements, etc.) in the switch. In this report, we propose a mathematical model for evaluating the maximum blocking probability of optical banyan networks on vertical stacking when the link failures are considered. Based on...

The simulation and investigation of a 32 × 10 Gb/s WDM all-optical bidirectional hybrid communication system for outdoor applications is presented in this article via multidisciplinary softwares. In order to track the condition, strain sensor based on fiber Bragg grating (FBG) integrated in-line with optic link (FO-link). Then, free space optical (FSO-link) 4-channel simulated act backup or res...

We report on numerical and experimental characterization of the performance of a fiber link optimized for the delivery of sub-100-fs laser pulses at 1550 nm over several meters of fiber. We investigate the power handling capacity of the link, and demonstrate all-fiber delivery of 1-nJ pulses over a distance of 5.3 m. The fiber link consists of dispersion-compensating fiber (DCF) and standard si...

Recent developments in Optical IP networks have heightened the need for reduction on power consumption via so called green photonics and concepts known as green networking. Adhering to these principles we proposed a novel energy savings approach which can be applied to optical IP networks and is based on so called “hibernation mode with segmentation link” technique. The hibernation mode techniq...

Dielectric mirror leakage at large angles of incidence limits the effectiveness of solid state optical refrigerators due to reheating caused by photon absorption in an attached load. In this paper, we present several thermally conductive link solutions to greatly reduce the net photon absorption. The Los Alamos Solid State Optical Refrigerator(LASSOR) has demonstrated cooling of a Yb+ doped ZBL...

Network survivability, reflecting the ability of a network to maintain an acceptable level of service during and after failures, is an important requirement for WDM optical networks due to the ultrahigh capacity. The most common network failure is the link failure which could cause enormous data loss and lots of service disruption to Internet users. Although single-link failures are the most co...

SUMMARY Optical wireless communications is a research topic of extreme interest since it offers high data rate (Gbps data rate), security, and RF interference immunity. However, optical wireless communications places severe restrictions on the communications paths; they must be direct beam connections. To increase the number of users and link robustness, optical wireless communications must be ...

Modulating retro-reflectors (MRR) couple passive optical retro-reflectors with electro-optic modulators to allow free-space optical communication with a laser and pointing/acquisition/tracking system required on only one end of the link. In operation a conventional free space optical communications terminal, the interrogator, is used on one end of the link to illuminate the MRR on the other end...

We experimentally demonstrate, for the first time, DDoS mitigation of QKD-based networks utilizing a software defined network application. Successful quantum-secured link allocation is achieved after a DDoS attack based on real-time monitoring of quantum parameters. OCIS codes: (060.0060) Fiber optics and optical communications; (060.1155) All-optical networks (060.5565); Quantum cryptography; ...