Abstract

In the present work we investigate the possibility of using optoelectronic feedback to selecting periodic dynamics in external cavity laser diodes subject to conventional optical feedback. Earlier work has explored the control of chaos in external cavity laser diodes using the occasional proportional feedback technique in an attempt to stabilize the dynamics [1]. Another more recent approach has considered the use of direct modulation to induce periodic oscillations from chaotic oscillations [2]. That work emphasized the need for selection of an appropiate modulation depth to achieve the required selection of periodic motion. The present approach, in contrast, seeks to utilize optoelectronic feedback to effect the control. In this case it is found that the critical need is to engineer an optoelectronic loop delay according with the desired periodic motion. In that respect, the present delayed feedback scheme is similar to that proposed by Pyragas [3].

© 1996 IEEE