| Authors: | A. Abbasi, G. Roelkens, G. Morthier | | Title: | Optimization of an Asymmetric DFB Laser Used as All-Optical Flip-Flop | | Format: | International Journal | | Publication date: | 2/2015 | | Journal/Conference/Book: | IEEE Journal of Quantum Electronics
| | Editor/Publisher: | IEEE, | | Volume(Issue): | 51(2) | | DOI: | 10.1109/jqe.2014.2378376 | | Citations: | 1 (Dimensions.ai - last update: 24/11/2024)
1 (OpenCitations - last update: 27/6/2024)
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Abstract
We have numerically optimized the speed of an all-optical flip-flop based on an AR-coated λ/4 phase shifted DFB laser. Numerical results show that by engineering the grating of the DFB laser and making the coupling coefficient asymmetrical, fall times reduce by a factor of 2 compared to a standard laser design. It is also shown that the confinement factor in the quantum wells and the length of the laser cavity have a significant impact on the flip-flop operation. The switching between two states can be realized using pulses with energies below 125 fJ and with a duration of 10 ps. The switching time can be reduced to 5 ps and the switching rate increased up to 10 GHz. Related Research Topics
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