s High-performance, multiquantum-well (MQW), distributed-feedback (DFB) laser D2587P-Type is offered on 50 GHz ITU grid wavelengths ranging from 1528.77 nm— 1610.06 nm D2547P-Type is offered on 100 GHz ITU grid wavelengths ranging from 1528.77 nm— 1610.06 nm Polarization-maintaining fiber pigtail F.