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A Silicon-on-Insulator-Based Thermo-Optic Waveguide Switch with Low Insertion Loss and Fast Response

Chinese Physics Letters 2005年第6期22卷 1449-1451页

作者：李艳萍余金中陈少武 StateKeyLaboratoryonIntegratedOptoelectronics InstituteofSemiconductorsChineseAcademyofSciencesPOBox912Beijing100083

A silicon-on-insulator-based thermo-optic waveguide switch integrated with spot size converters is designed and fabricated by inductively coupled plasma reactive ion etching. The device shows good characteristics, including low, insertion loss of 8 +/- 1 dB for wavelength 1530-1580 nm and fast response times of 4.6 As for rising edge and 1.9 mu s for failing edge. The extinction ratios of the two channels are 19.1 and 18 dB, respectively.

关键词： LOW-POWER CONSUMPTION FABRICATION spot size fabrication extinction coefficients insertion loss rising edge Reaction Time FAST-RESPONSE Waveguide switches

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Impact of Rayleigh backscattering on single/dual feeder fiber WDM-PON architectures based on array waveguide gratings

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Frontiers of Optoelectronics 2013年第1期6卷 102-107页

作者： Muhammad Idrees AFRIDI Jie ZHANG Yousaf KHAN Jiawei HAN Aftab HUSSEIN Shahab AHMAD State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China

The performance of colorless wavelength-division multiplexing passive optical network (WDMPON) systems suffers from transmission impairments due to Rayleigh backscattering (RB). A single feeder fiber colorless WDM-PON architecture was modeled, simulated and analyzed at 25 km distance that sustained the noise induced by RB. We analytically compared the performances between single feeder and dual feeder WDM-PON architectures based on array waveguide gratings (AWGs). For single feeder WDM-PON, the high extinction ratios in both return-to-zeros (RZ)-shaped differential phase shift keying (DPSK) downstream and intensity remodulated upstream data signals helped to increase the tolerance to the noise induced by RB. However, a cost effective colorless system in dual feeder WDM-PON architecture was achieved without any optical amplification and dispersion compensation, low power penalty. These results illustrate that single feeder fiber architecture was cost effective in terms of deployment having a power penalty, while dual feeder fiber had lower power penalty thereby with better performance. Simulation results show that downstream and upstream signals achieved error-free performance at 10-Gbps with negligible penalty and enhanced tolerance to the noise induced by RB over 25 km single mode fiber.

关键词： wavelength division multiplexed-passive optical network (WDM-PON) Rayleigh backscattering (RB) differential phase shift keying (DPSK) arrayed waveguide grating(AWG) Fiber extinction coefficients differential phase shift keying backscattering penalty Propagation losses Stimulated emission ARCHITECTURE Arrayed waveguide gratings Noise data signal Dispersion compensation Rayleigh Rubidium

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