| Title |
Design of Monolithically Integrated Vertical Cavity Laser with Depleted Optical Thyristor for Optically Programmable Gate Array |
| Authors |
최운경(Choi, Woon-Kyung) ; 김도균(Kim, Do-Gyun) ; 최영완(Choi, Young-Wan) |
| Keywords |
Vertical Cavity Laser ; Depleted Optical Thyristor ; Optical Switch |
| Abstract |
We have theoretically analyzed the monolithic integration of vertical cavity lasers with depleted optical thyristor (VCL-DOT) structure and experimentally demonstrated optical logic gates such as AND-gate, OR-gate, and INVERTER implemented by VCL-DOT for an optical programmable gate array. The optical AND and OR gates have been realized by changing a input bias of the single VCL-DOTs and all kinds of optical logic functions are also implemented by adjusting an intensity of the reference input beams into the differential VCL-DOTs. To achieve the high sensitivity, high slope efficiency and low threshold current, a small active region of lasing part and a wide detecting area are simultaneously designed by using a selective oxidation process. The fabricated devices clearly show nonlinear s-shaped current-voltage characteristics and lasing characteristics of a low threshold current with 0.65 mA and output spectrum at 854 nm. |