ʻO 900-1700nm ka laulā o nā mea InGaAs, a ʻoi aku ka haʻahaʻa o ka leo hoʻonui ma mua o ka mea germanium. Hoʻohana maʻamau ia ma ke ʻano he wahi hoʻonui no nā diodes heterostructure. Ua kūpono ka mea no nā kamaʻilio fiber optical kiʻekiʻe, a ua hōʻea nā huahana pāʻoihana i ka wikiwiki o 10Gbit / s a i ʻole.