Abstract: A directly modulated $1.3 \mu \mathrm{m}$ InGaAlAs/InP DFB laser having MQW based passive DBR section has been fabricated. The modulation bandwidth of the device is 29 GHz. 50 Gb/s NRZ and ...

The S=1 spin ladder with the easy-axis single-ion anisotropy is investigated using the numerical diagonalization and the finite-size scaling analysis. It is found that the field-induced nematic ...