Title :
Low Hysteresis Threshold Current (39 mA) Active Multimode-Interferometer (MMI) Bistable Laser Diodes Using Lateral-Modes Bistability
Author :
Jiang, Haisong ; Bastawrous, Hany Ayad ; Hagio, Takuma ; Matsuo, Shinji ; Hamamoto, Kiichi
Author_Institution :
Interdiscipl. Grad. Sch. of Eng. Sci. (I-EggS), Kyushu Univ., Fukuoka, Japan
Abstract :
We demonstrate low hysteresis threshold current (39 mA) bistable laser diodes (BLDs), with maintaining sufficient hysteresis window (7 mA, 18% of the hysteresis threshold), in active multimode-interferometer (MMI) using lateral-modes bistability. The sufficient cross-gain saturation effect, due to the lateral-modes bistability principle, enables wide hysteresis window. By using this principle, we could design the active-MMI BLDs with relatively short saturable-absorber length that has been one of the main causes of high hysteresis threshold current. In the actual design, we reduce the saturable-absorber region length to 25 μm, and thus, we could achieve a low hysteresis current of 39 mA in the active-MMI BLDs with maintaining sufficient hysteresis window for the first time.
Keywords :
laser modes; light interferometry; optical bistability; optical saturable absorption; semiconductor lasers; active multimode-interferometer bistable laser diodes; cross-gain saturation effect; current 39 mA; current 7 mA; hysteresis current; lateral-mode bistability; low hysteresis threshold current; saturable-absorber length; size 25 mum; Diode lasers; Hysteresis; Optical bistability; Optical buffering; Optical interferometry; Optical saturation; Threshold current; Active multimode interferometer (MMI); bistable laser diode (BLD); cross-gain saturation; low threshold current; saturable absorber;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2011.2156386
