T. Ohara

Over-1000-channel ultradense WDM transmission with supercontinuum multicarrier source

In this paper, ultradense wavelength-division multiplexing (WDM) transmission technologies are discussed, and a field demonstration of over-1000-channel ultradense WDM transmission is reported. The generation of an ultradense WDM signal using a supercontinuum multicarrier source that generates more than 1000 carriers and uniform precise channel spacing of 6.25 GHz is presented. The influence of four-wave-mixing generated in the transmission fiber and the requirements placed on the WDM multiplexer and demultiplexer is described. An over-1000-channel ultradense WDM transmission experiment is reported. A 1046 /spl times/ 2.67-Gbit/s 6.25-GHz-spaced ultradense WDM signal is successfully transmitted over 126 km of field-installed fibers in the test bed of JGN II.

160-Gb/s optical-time-division multiplexing with PPLN hybrid integrated planar lightwave circuit

160-Gb/s (20 Gb/s /spl times/ 8) optical time-division-multiplexing is demonstrated using a multiplexer based on periodically poled lithium niobate hybrid integrated planar lightwave circuits. With this multiplexer, eight 20-Gb/s signals are independently modulated and time division multiplexed all-optically. To confirm the quality of the multiplexed signal, it was demultiplexed and bit error rates were measured. The measured power penalties are less than 2.2 dB.

160-Gb/s OTDM transmission using integrated all-optical MUX/DEMUX with all-channel modulation and demultiplexing

This letter provides the first report of 160-Gb/s optical time-division-multiplexed transmission with all-channel independent modulation and all-channel simultaneous demultiplexing. By using a multiplexer and a demultiplexer based on periodically poled lithium niobate and semiconductor optical amplifier hybrid integrated planar lightwave circuits, 160-km transmission is successfully demonstrated.

40-Gb/s x 4-channel all-optical multichannel limiter utilizing spectrally filtered optical solitons

We propose a novel all-optical multichannel limiter that uses spectrally filtered optical solitons. The periodic nonlinear optical fiber described herein can suppress the interchannel interaction caused by four-wave mixing. By applying this all-optical multichannel limiter to a 40-Gb/s /spl times/ 4-channel wavelength-division-multiplexing signal, minimum received optical powers at the bit-error rate of 10/sup -9/ were improved by more than 2 dB in all channels.

160-gb/s all-optical limiter based on spectrally filtered optical solitons

We demonstrate all-optical limiting of a 160-Gb/s optical time-division-multiplexed signal by using spectrally filtered optical solitons. Signal input power tolerance for improving Q factors is 3.6 dB. Q factors after 230-km transmission were improved by 1.8 dB.

Ultra-wideband tellurite/silica fiber Raman amplifier and supercontinuum lightwave source for 124-nm seamless bandwidth DWDM transmission

We present over 120-nm-bandwidth optical elements; hybrid tellurite/silica fiber Raman post/inline amplifiers, a supercontinuum source, and an interleave filter. Using these elements, 124-nm-seamless bandwidth DWDM transmission (313 /spl times/ 10 Gbit/s, 160 km) is successfully conducted.

Demonstration of automatic multi-reliability service class LSP provisioning via coordination of GMPLS/OIF-OUNI

Automatic multi-reliability service class LSP provisioning via coordination of GMPLS/OIF-OUNI protocols is successfully demonstrated for the first time. This paper experimentally evaluates the provisioning and switching performance in a photonic IP network.

106 /spl times/ 10 Gbit/s, 25 GHz-spaced, 640 km DWDM transmission employing a single supercontinuum multi-carrier source

Summary form only given. Future photonic networks will need to generate over one hundred optical carriers (modes) at ITU grids with well-controlled spacing. Supercontinuum (SC) generation is an effective way of obtaining such well-managed optical carriers by broadening the input optical pulse spectrum while maintaining coherency. Some of the advantages of using SC are a fixed channel spacing with an accuracy of a microwave oscillator and super-broadened spectra, and the capability of generating more than 100 channels. So far, WDM transmission experiments using SC-based pulse sources have been demonstrated. However, transmission experiments utilizing SC sources as multi-carrier sources have not been reported yet. In order to apply the SC sources to future photonic networks, the SC sources must be able to generate high power, high SNR optical carriers. Recently, we have generated 1000-channel optical carriers from a single SC source, and improved the output power and the SNR of the optical carriers. This paper describes the first transmission experiment utilizing the advanced SC multi-carrier source (SC-MCS) which generates over 1000 optical carriers with high power and high SNR.