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TOC Alert for Publication# 3 2014December 18<![CDATA[Thermally Induced Beam Distortions in Sesquioxide Laser Ceramics of m3 Crystal Class—Part II]]>512184065<![CDATA[Stability Limit of a Semiconductor Laser With Optical Feedback]]>$k$ ), the external cavity length ($L$ ), and the injection current ($J$ ). In contrast to existing work in literature, the presented removed all the approximations and assumptions, hence resulting in relatively complete description of the stability limit. This paper presented leads to a number of important and interesting discoveries: 1) the possible stable area is broader than what is described by the existing work; 2) for long external cavities, the stability limit can be described by a linear relationship between $k$ and $L$ ; and 3) on the stability limit, the critical feedback strength ($k_{c} $ ) and critical external cavity length ($L_{c} $ ) are discovered, respectively, being proportional and inversely proportional to $J$ and $k$ .]]>512191186<![CDATA[Optimization of an Asymmetric DFB Laser Used as All-Optical Flip-Flop]]>$lambda $ /4 phase-shifted distributed feedback (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 with 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.]]>512161465