10-Gbit/s optical transmitter module with multiquantum well DFB LD and doped-channel hetero-MISFET driver IC

Abstract

Long haul optical transmission systems to handle ~10-Gbit/s signals are now being developed.1·2 For such large capacity transmission systems, a high speed laser diode (LD) driver IC is a key component.3 The i-AlGaAs/n-GaAs doped-channel hetero-MIS- FETs (DMTs), taking advantage of high current drivability and high breakdown voltage, are attractive for high output power ICs, such as LD drivers.4 We have constructed miniature optical transmitter modules using the newly developed DMT LD driver ICs and high speed multiquantum well (MQW) DFB LDs. Very high speed operation, up to 10 Gbit/s, has been achieved.