Résumé
Four echelle-type spectrometers with heterogeneously integrated GaInAsSb photodetectors on a silicon-on-insulator chip is realized. The operating wavelengths stretch from 1500 to 2300 nm. A maximum channel crosstalk of -10 dB, dark current of -2.5 mu A and responsivity of 0.61 A/W at 1530 nm and 0.7 A/W at 2200 nm were obtained.