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We integrate an improved colorless thermooptic-lens-based tunable dispersion compensator (tuning range of plusmn160 ps/nm) with a tunable amplified spontaneous emission filter on a single silica waveguide chip. We demonstrate fast automatic adjustment of the compensator
It is difficult to employ conventional Butterworth filters in 40 Gbit/sec applications with 100 GHz-spacing due to their strong group delay dispersions. This paper shows design, fabrication and measurements of a thin film Bessel filter applicable for 40 Gbit/sec VSB signals, and compares the results to a typical Butterworth filter. This Bessel filter has very low dispersion because of its flattened...
We use switchable fiber-gratings in higher-order-mode fibers to demonstrate a wavelength-continuous adjustable dispersion-compensator (tuning range ~ 435 ps/nm) that is broadband (30 nm) and low loss (average ~ 3.7 dB). 40 Gb/s transmission tests reveal penalty-free operation
We report on a network experiment using 320times320 lambda-port "Broadcast & Select" optical cross-connects (OXC). 80times10.7 Gb/s NRZ transmission over 4160 km of all-Raman amplified dispersion-managed fiber (52times80 km spans) and 13 concatenated OXCs is demonstrated. The impact of a large number of crosstalk terms is studied
Design and performance of a novel, fast, endless, and continuously tunable nematic liquid crystal polarization controller is reported. A negligible power penalty was observed when the polarization controller was used for PMD compensation at 40 Gb/s
A new modular SOA-based integrated interferometer is presented: 40 Gb/s standard mode wavelength conversion is performed on the C-band with the 2-SOA's device, while 8 dB input power dynamic range is shown with the 4-SOA's version
We demonstrate 6.4 Tb/s WDM transmission based on the phase-shaped binary transmission scheme and strong optical filtering over 2,100 km, yielding a record 13.3 Pbit/smiddotkm capacity times distance for terrestrial systems. A particularly good tolerance to non-linearities at 40 Gb/s has been measured
An interferometric wavelength converter with power monitor has been monolithically integrated with a digitally tunable 4-channel laser for the first time. Converted signals showed excellent static extinction ratios of over 20 dB
We demonstrate experimentally a technique to cancel the spectrum broadening in a fiber optical parametric wavelength converter (WC) by using two pumps phase-modulated 180deg out of phase, one of them being obtained by four-wave mixing in an auxiliary fiber. The resulting WC spectrum is comparable to that of the input signal
A simple self-routing edge-to-edge optical packet switched network based on all-optical recognition of a 20 Gchip/s cascaded header using fibre Bragg gratings is presented. Self-routing of optical packets through two network switching nodes is demonstrated
We experimentally validated a new transparent monitoring method based on asynchronous under-sampling enabling eye-diagram reconstruction and BER estimation. It gives very accurate BER estimation in presence of chromatic dispersion and non-linear effects without requiring knowledge of the bit rate
HNL-DSF with dispersion slope of 0.013 ps/nm2/km and gamma of 25 W-1km-1 was fabricated. This dispersion slope is reduced to less than half value of ordinary HNL-DSFs. This fabricated HNL-DSF can relax the pumping wavelength accuracy and extend the conversion range. The advantage of lower dispersion slope HNL-DSF was described in this paper
A new low-cost design for L-band EDFA is presented. The cladding-pumped amplifier exhibits 30 dB gain over 1570-1607 nm gain band with noise figure below 6 dB and power excursions below 0.1 dB for 10 dB variations of input power
We report the fabrication of a hollow core photonic band-gap fibre with a loss less than 30 dB/km over a 125 nm transmission window. The 100-meter length of fibre has a minimum loss of 13 dB/km at 1500 nm. This result represents an improvement of nearly two orders of magnitude in the reported attenuation of air-core fibres
We describe a photonic crystal fibre with an optical loss of 0.58 dB/km. We find a strong correlation between the measured loss minimum and the overall structural scale in otherwise identical fibres
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