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We report here a new dynamic device that can compensate a spectral variation in the erbium doped fibre amplifier (EDFA) gain. This device offers low cost, low insertion loss and it is easy to implement
An EDFA covering the full C-band has been operated with a record output power of +33 dBm, owing to a new 50-mum pump design incorporating 100-mum diodes
We demonstrate high-performance operation of a novel, monolithically integrated reconfigurable optical add-drop multiplexer (ROADM). The 16-channel device provides flexible functionality enabling a variety of network applications. High-isolation performance and cascadability of eight ROADM nodes is shown
Bit-by-bit label-recognition for 40-Gbit/s 16-bit burst-mode optical packets is achieved by means of a self-serial-to-parallel conversion system and a CMOS circuit. 1times4 self-routing controlled by 2-ch signals from the label-recognition system is demonstrated
1.5 mum waveband optically pumped tunable VCSELs with 38 nm tunability at tuning voltage values below 4 V were fabricated. 5 m aperture devices show 1 mW single mode output power with 40 dB side mode suppression ratio
Total coupling losses as low as 4.37 dB (fibre to waveguide to semiconductor amplifier and back, excluding amplifier gain) were achieved using entirely passive alignment in a hybrid-integrated optical regenerator. Penalty-free 2R regeneration at 40 Gbit/s was demonstrated
Eighty 42.7-Gb/s, 100-GHz-spaced WDM channels were transmitted over 52 times 100 km of UltraWavetrade fiber. We employed dispersion-managed fiber spans, return-to-zero differential-phase-shift-keyed modulation, balanced detection, and all-Raman amplification to achieve this capacity times distance record of 16.6 petabit-km/s for 40-Gb/s transmission
All-Raman transmission of 128times42.7 Gb/s at 50 GHz channel spacing over 1280 km of standard single-mode fiber is demonstrated. This record capacity for this high spectral efficiency is achieved by strong filtering of carrier-suppressed return-to-zero signals
Very high power and efficient 980 nm pump laser diodes have been developed in a ridge waveguide process. Based on these laser diodes, modules with a power output of 1 W in the fiber at 1.4 A drive current and a power conversion efficiency of 40% are demonstrated
We report the first InP based 1550-nm quantum dash semiconductor optical amplifier. A 12 dB gain, a gain bandwidth wider than 150 nm and a symmetric four wave mixing response indicating a low alpha-parameter are demonstrated
A 16-channel wavelength selective cross-connect is demonstrated using planar waveguides and MEMS piston-mirrors. Compared to thermooptic switching, inter-switch crosstalk and power consumption are eliminated
We demonstrate error free transmission of 40times40 Gbit/s over 5200 km UltraWavereg fiber with 100 km span length and 100 GHz channel spacing using turn-key ETDM transmitter and receiver, CS-RZ modulation, enhanced FEC and all-Raman amplification
40 GHz-spaced 25 times 42.7 Gbit/s transmission was successfully conducted over 320 km by using EDFA repeaters, asymmetrically filtered CS-RZ signal, an OTDM receiver and a novel spectral crosstalk suppressor based on the optical gating of dispersively stretched signal
Buried tunnel junction vertical-cavity surface-emitting lasers for 1.55 mum wavelength are demonstrated with excellent stationary and dynamic lasing characteristics. Transmission experiments with single-mode VCSELs show error-free data transmission at modulation frequencies up to 10 Gbit/s
Using a broadband distributed Raman amplifier with pump-and-signal wavelength-interleaving allocation, we demonstrated 120-km transmission with a 201.8-nm signal bandwidth, for the first time, which can have 1001 channels on the grid with 25-GHz spacing
Automatic, simultaneous compensation of both PMD and chromatic dispersion in a 44times43 Gbit/s transmission experiment over 6times100 km high-PMD SMF is demonstrated for the first time. Longer-term experiments as well as WDM channel evaluations show effective compensation performance
A novel "alternating data clock" (ADC-3R) all-optical 3R regenerator providing wavelength flexible output is presented. Compact semiconductor devices are applied and excellent re-timing and re-shaping of ADC-3R is demonstrated at 40 Gbit/s for the first time
We demonstrate error-free, asynchronous packet transmission and fast simultaneous switching on four 40 Gb/s ports in a 32-port optical switch fabric. The sensitivity under switching is better than -3 dBm for all four burst-mode receivers
Next generation NZ-DSF with dispersion slope completely 0.00 ps/nm 2/km and lambdao shorter than 1350 nm has designed and fabricated. The transmission bandwidth is improved over 300 nm and dispersion difference is 1.02 ps/nm/km in whole S, C, L-band
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