We propose and fabricate a vertically integrated thermo-optic waveguide switch. It controls the optical path between two vertically stacked waveguides using the thermo-optic effect of optical polymer. The measured cro...We propose and fabricate a vertically integrated thermo-optic waveguide switch. It controls the optical path between two vertically stacked waveguides using the thermo-optic effect of optical polymer. The measured crosstalk is less than -10 dB.展开更多
Due to the excellent electro-optic properties of lead lanthanum zirconium titanate(ePb; LaTeZr; TiTO3, PLZT),compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricat...Due to the excellent electro-optic properties of lead lanthanum zirconium titanate(ePb; LaTeZr; TiTO3, PLZT),compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. By introducing a thin isolating layer between the waveguides and the electrodes, the absorption loss of the fabricated 1 × 2 PLZT switch caused by the electrodes is reduced 8.9 d B with a relatively low driving voltage. The 1 × 2 PLZT switch shows an insertion loss of 18.3 d B and crosstalk of-20.5 d B at an applied voltage of 9.5 V. The fabricated 1 × 4 switch array shows an insertion loss of 20.7 d B and a crosstalk of-20.5 d B at an applied voltage of 13 V. The response time of the switches is less than 27 ns, and the device’s size is only 15 mm × 6 mm. The switches can be used in optical communication systems.展开更多
A new integrated scheme based on resource-reservation and adaptive network flow routing to alleviate contention in optical burst switching networks is proposed. The objective of the proposed scheme is to reduce the ov...A new integrated scheme based on resource-reservation and adaptive network flow routing to alleviate contention in optical burst switching networks is proposed. The objective of the proposed scheme is to reduce the overall burst loss in the network and at the same time to avoid the packet out-of-sequence arrival problem. Simulations are carried out to assess the feasibility of the proposed scheme. Its performance is compared with that of contention resolution schemes based on conventional routing. Through extensive simulations, it is shown that the proposed scheme not only provides significantly better burst loss performance than the basic equal proportion and hop-length based traffic routing algorithms, but also is void of any packet re-orderings.展开更多
文摘We propose and fabricate a vertically integrated thermo-optic waveguide switch. It controls the optical path between two vertically stacked waveguides using the thermo-optic effect of optical polymer. The measured crosstalk is less than -10 dB.
基金This work was supported by the National“973"Project of China(Grant No,G2000-03-66)the National“863”Project(Grant No.2002AA3 12060)of the Ministry of Science and Technology of Chinathe National Natural Science Foundation of China(Grant Nos.69896260 and 60336010).
基金supported by the State Key Program of the National Natural Science Foundation of China under Grant No.61535012
文摘Due to the excellent electro-optic properties of lead lanthanum zirconium titanate(ePb; LaTeZr; TiTO3, PLZT),compact 1 × 2 and 1 × 4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. By introducing a thin isolating layer between the waveguides and the electrodes, the absorption loss of the fabricated 1 × 2 PLZT switch caused by the electrodes is reduced 8.9 d B with a relatively low driving voltage. The 1 × 2 PLZT switch shows an insertion loss of 18.3 d B and crosstalk of-20.5 d B at an applied voltage of 9.5 V. The fabricated 1 × 4 switch array shows an insertion loss of 20.7 d B and a crosstalk of-20.5 d B at an applied voltage of 13 V. The response time of the switches is less than 27 ns, and the device’s size is only 15 mm × 6 mm. The switches can be used in optical communication systems.
文摘A new integrated scheme based on resource-reservation and adaptive network flow routing to alleviate contention in optical burst switching networks is proposed. The objective of the proposed scheme is to reduce the overall burst loss in the network and at the same time to avoid the packet out-of-sequence arrival problem. Simulations are carried out to assess the feasibility of the proposed scheme. Its performance is compared with that of contention resolution schemes based on conventional routing. Through extensive simulations, it is shown that the proposed scheme not only provides significantly better burst loss performance than the basic equal proportion and hop-length based traffic routing algorithms, but also is void of any packet re-orderings.
