N. Shaw et al., OPTOELECTRONIC INTEGRATED-CIRCUIT (OEIC) WAVE-GUIDE COUPLER FOR SPOT SIZE EXPANSION AND IMPROVED FIBER COUPLING EFFICIENCY, Electronics Letters, 31(14), 1995, pp. 1143-1145
An MOVPE vertical coupler structure is used to provide efficient coupl
ing between InP/InGaAsP optoelectronic integrated circuit (OEIC) waveg
uides and cleaved monomode fibres. A 2 dB improvement in the coupling
efficiency of TE polarised light of wavelength 1.55 mu m is demonstrat
ed. The structure does not require any additional growth steps, and is
compatible with vertically integrated detector structures.