کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1537993 | 996600 | 2011 | 8 صفحه PDF | دانلود رایگان |

We consider experimentally and theoretically the optical field dynamics of a five-emitter laser array subject to a ramped injection current. We have achieved experimentally an array that produces a robust oscillatory power output with a nearly constant π phase shift between the oscillations from each waveguide. The output power also decreases linearly as a function of waveguide number. Those behaviors persisted for pump currents varying between 380 and 500 mA with only a slight change in phase. Of note is the fact that the fundamental frequency of oscillation increases with injection current, and higher harmonics are produced above a threshold current of approximately 380 mA. Experimental observations and theoretical predictions are in agreement. A low dimensional model was also developed and the impact of the nonuniform injection current studied. A nonuniform injection current is capable of shifting the bifurcations of the waveguide array providing a valuable method of array tuning without additional gain or structural alterations to the array.
Research Highlights
► Five-emitter array fabricated with a sloped injection current.
► Array produces oscillatory power output between 380 and 500 mA.
► Frequency of power oscillation is directly related to injection current.
► Good agreement between experiment and the theoretical model.
► Injection current slope alters the gain at where the array loses stability.
Journal: Optics Communications - Volume 284, Issue 4, 15 February 2011, Pages 971–978