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We have developed a single plastic objective lens compatible with BD/DVD/CD systems. This objective lens has a self NA control function and shows favorable reading characteristics.
Operation at 40 Gbit/s with a constant driving voltage (3.5 Vpp) for the entire L-band was demonstrated with a newly developed compact InP-based DQPSK module. A linear DC bias voltage control was employed to compensate for a wavelength dependence of the half-wavelength voltage.
10-Gbit/s optical duobinary transmission over a 200-km single-mode fiber is demonstrated using a lossless InP n-p-i-n Mach-Zehnder modulator monolithically integrated with a semiconductor optical amplifier. The device gain exceeds 8 dB and the static extinction ratio is over 26 dB for a wavelength of 1550 nm. An error free operation was achieved with a power penalty of less than 5 dB at a low driving...
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