High Relaxation Oscillation Frequency (beyond 10 GHz) of GaAlAs Multiquantum Well Lasers

Abstract

Direct modulation bandwidth of GaAlAs multiquantum well (MQW) lasers with 5 nm-thick GaAs wells was investigated. It was experimentally found that relaxation oscillation frequency of MQW lasers is beyond 10 GHz, which is twice that of double heterostructure lasers. This result was confirmed by theoretical analysis.