Article

A significant reduction of propagation losses in InGaAsP-InP buried-stripe waveguides by hydrogenation

Lab. de Bagneux, CNET, Bagneux, France
IEEE Photonics Technology Letters (impact factor: 2.19). 04/1998; DOI:10.1109/68.661413 pp.370 - 372
Source: IEEE Xplore

ABSTRACT We show here that the high propagation losses often measured at /spl sim/1.56 /spl mu/m in InGaAsP-InP buried-ridge stripe waveguides can be significantly brought down by implementing hydrogenation (exposure to deuterium plasma) as the last step to device termination. For example, losses as high as /spl sim/30 dB/cm measured in conventional as-processed structures have dropped down after hydrogenation to typically 4-5 dB/cm. This improved loss value is totally compatible for the realization of passive sections in photonic circuits. We further present preliminary data describing the good thermal stability of these propagation losses in post-hydrogenated structures.

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Keywords

conventional as-processed structures
 
deuterium plasma
 
good thermal stability
 
improved loss value
 
losses
 
passive sections
 
photonic circuits
 
post-hydrogenated structures
 
propagation losses