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Ultrahigh-speed 1.55 mu m lambda /4-shifted DFB PIQ-BH lasers with bandwidth of 17 GHz

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3 Author(s)
Uomi, K. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Nakano, H. ; Chinone, N.

Ultrahigh-speed 1.55 mu m lambda /4-shifted DFB PIQ-BH lasers with best-ever 17 GHz bandwidth as a DFB laser have been developed. This large bandwidth is attained by reducing the parasitic capacitance with a low doped p-InP buried layer and a PIQ (Hitachi Chemicals polyimide) layer, and by enhancing the relaxation oscillation frequency by optimisation of the waveguide structures.

Published in:

Electronics Letters  (Volume:25 ,  Issue: 10 )