The effects of injection locking a laser diode which is also subject to varying levels of optical feedback from an external Ž . reflector are investigated. It is found that the locking range of a laser diode with optical feedback LDWOF is reduced relative to that of a solitary laser diode depending on both the increased photon lifetime and the amount of optical feedback. When the LDWOF is locked in frequency to the external injection source then the coherence collapse, and other low optical… CONTINUE READING
Fig. 2. Experimental apparatus. Vbs: variable beam splitter, bs: beam splitter, Is: optical isolator, FP: Fabry–Perot interferometer, PD: photodiode, WM: wavemeter or monochromator, PM: power meter, TDL: tunable diode laser, R : external reflector, and RF:ext Ž .radio frequency signal generator used only in part B .