Detuning characteristics of a subharmonically hybrid mode-locked monolithic semiconductor laser

The detuning characteristics of subharmonic hybrid mode-locking (SH-ML) of a monolithic semiconductor laser at 33 GHz are investigated. We used a 1.55 /spl mu/m semiconductor laser consisting of a saturable absorber (SA), a gain, a phase control, and a DBR section. A locking bandwidth of 56 MHz is obtained under the third order SH-ML, which is more than twice larger than that under the fundamental hybrid mode-locking (FH-ML).