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Monolithically integrated wavelength converter based on semiconductor optical amplifier with distributed feedback laser diode is fabricated. Gain recovery time of 7 ps is achieved for the semiconductor optical amplifier in experiment with simulated optimization.
A theoretically predicted concept for a monolithically integrated optical waveguide isolator is experimentally demonstrated for the first time. Preliminary non-reciprocity measurements indicate isolation ratios in the range of the design values, proving the device's potential.
We demonstrate a polarization-insensitive single-pumped optical-parametric-amplifier by depolarizing the pump using a polarization controller followed by a piece of polarization-maintaining fiber with /spl sim/ 100-ps DGD. The polarization-dependent-gain is reduced from 8 dB to <1 dB.
We derived an analytical expression for the statistics of the polarization-dependent gain in a counter-pumped Raman amplifier and verified it with experimental and numerically simulated data. The results showed that the gain variation in a counter-pumped amplifier was only a factor of 3 smaller than that in a co-pumped scheme.
UTC photodiode module with responsivity of 0.72 A/W (TE/TM = 0.4 dB) and bandwidth > 50 GHz is demonstrated. 517 mV output voltage (+12 dBm optical power) and 1.38 ps jitter are achieved at 40 Gb/s.
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