Efficient Membrane Grating Couplers on InP
15 June 2010
We demonstrated an efficient coupler on InP using an etched grating on a suspended InGaAsP membrane. We measured a peak coupling efficiency of 40% (-4 dB) between a cleaved standard single-mode fiber and a conventional non-suspended InGaAsP waveguide with a 3-dB bandwidth of ~45 nm.