JIUN-HAW LEEWang, J.-Y.J.-Y.WangYEAN-WOEI KIANGCHIH-CHUNG YANG2018-09-102018-09-10200107403224http://www.scopus.com/inward/record.url?eid=2-s2.0-0035599757&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/292611Feasibility of pulsed-signal operation of all-optical self-switching and cross switching in an all-semiconductor optical-amplifier nonlinear optical loop device is reported. The device, based on a GaAs/AlGaAs quantum-well epitaxial structure, has dimensions of 0.6 mm × 1.3 mm and a latency of 49.2 ps. It is composed of a loop amplifier, a multimode interference waveguide amplifier (MMIWA), an input leg, and an output leg. The functions of the MMIWA include input/output power splitting and nonlinear coupling. Those of the loop include signal amplification, rearrangement of the field distribution in the MMIWA, and asymmetric gain/phase modulation between the two counterpropagating signals. With these functions combined, quite efficient power-dependent switching was implemented. Numerical-simulation results agreed well in trends with experimental data. From the results of output pulse width and the pump-probe measurements, it is expected that high-speed operation of the device for all-optical modulation and multiplexing/demultiplexing is feasible. © 2001 Optical Society of America.Computer simulation; Light amplifiers; Light modulation; Nonlinear optics; Optical pumping; Optical waveguides; Phase modulation; Quantum interference devices; Semiconducting gallium arsenide; Semiconductor quantum wells; Semiconductor optical amplifiers (SOA); Optical switchesjournal article2-s2.0-0035599757