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Measurements of coupling and reflection characteristics of butt-joints in passive waveguide integrated laser diodes

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4 Author(s)
Jung-Ho Song ; Opt. Devices Dept., Electron. & Telecommun. Res. Inst., Daejon, South Korea ; Jung-Woo Park ; Eun-Deok Sim ; Yongsoon Baek

Amplified spontaneous emission (ASE) spectra of passive waveguide integrated lasers have been studied to estimate the coupling efficiency and the reflectivity at the butt-joints between active and passive waveguides. A new method has been proposed for the analysis of ASE to extract the coupling efficiency and reflectivity at the butt-joints. This method was applied experimentally to estimate the coupling and reflection of the passive waveguide integrated lasers with different amounts of vertical misalignments of active and passive waveguides.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 9 )