Amphibians and reptiles of the Calakmul Biosphere Reserve, México, with new records

We provide a list of amphibians and reptiles of the Calakmul Biosphere Reserve in the southern half of the Mexican Yucatan, in the state of Campeche. The study area was sampled through opportunistic, transect and pitfall trap surveys conducted for three successive years. These surveys resulted in a total of 2,359 amphibian and reptile encounters, belonging to 20 amphibian and 69 reptile species from 24 total families. We present herein the records for one snake, one chelonian and two salamander species not previously recorded in the area

Time-division-multiplexed few-mode passive optical network

We demonstrate the first few-mode-fiber based passive optical network, effectively utilizing mode multiplexing to eliminate combining loss for upstream traffic. Error-free performance has been achieved for 20-km low-crosstalk 3-mode transmission in a commercial GPON system carrying live Ethernet traffic. The alternative approach of low modal group delay is also analyzed with simulation results over 10 modes

Supermodes In Strongly-Coupled Multi-Core Fibers

Single-mode and higher-order supermodes in the strongly-coupled multi-core fibers have been investigated. These fibers offer high mode density, ease of (de)multiplexed, and tunability in mode coupling as well as differential modal group delay. © 2013 OSA

Supermodes In Strongly-Coupled Multi-Core Fibers

Single-mode and higher-order supermodes in the strongly-coupled multi-core fibers have been investigated. These fibers offer high mode density, ease of (de)multiplexed, and tunability in mode coupling as well as differential modal group delay. © 2013 OSA

Hole-Assisted Few-Mode Multi-Core Fiber For High-Density Space-Division Multiplexing

A seven-core few-mode multi-core fiber in which each core supports three spatial modes has been designed and fabricated for the first time. The hole-assisted structure allows low crosstalk transmission of 21 spatial modes per polarization per wavelength. © 2012 IEEE

Low-Crosstalk Few-Mode Multi-Core Fiber For High-Mode-Density Space-Division Multiplexing

A seven-core few-mode multi-core fiber in which each core supports three spatial modes has been designed and fabricated. Low inter-core crosstalk is achieved with a high mode density. This fiber allows multiplexed transmission of 21 spatial modes per polarization. © 2012 OSA

Hole-Assisted Few-Mode Multicore Fiber For High-Density Space-Division Multiplexing

A seven-core few-mode multicore fiber in which each core supports both the LP 01 mode and the two degenerate LP 11 modes has been designed and fabricated for the first time, to the best of our knowledge. The hole-assisted structure enables low inter-core crosstalk and high mode density at the same time. LP 01 inter-core crosstalk has been measured to be lower than-60~dB km. LP 11 inter-core crosstalk has been measured to be around-40~ dB km using a different setup. The LP 11 free-space excitation-induced crosstalk is simulated and analyzed. This fiber allows multiplexed transmission of 21 spatial modes per polarization per wavelength. Data transmission in LP-01 LP 11 mode over 1 km of this fiber has been demonstrated with negligible penalty. © 2012 IEEE

Low-Crosstalk Few-Mode Multi-Core Fiber For High-Mode-Density Space-Division Multiplexing

A seven-core few-mode multi-core fiber in which each core supports three spatial modes has been designed and fabricated. Low inter-core crosstalk is achieved with a high mode density. This fiber allows multiplexed transmission of 21 spatial modes per polarization. © 2012 Optical Society of America

Experimental Demonstration Of 5-Mode Pon Achieving A Net Gain Of 4 Db In Upstream Transmission Loss Budget

We demonstrate the first integrated 5-mode passive optical network, utilizing spatial modes to eliminate upstream combining loss. BERs of less than 10-9 were obtained for all 5 modes enabling Ethernet transmission using commercial GPON equipment without packet loss

Tdma Few-Mode Passive Optical Network

We demonstrate the first few-mode PON network that can eliminate upstream combining loss. The PON architecture only requires direct detection because TDMA alleviates the need for mode demultiplexing even in the presence of mode crosstalk