Demonstration of a ROADM Using Cyclic AWGs

Tsai, Cheng-Mu; Taga, H.; Yang, Cheng-Hao; Lo, Yu-Lung; Liang, Tsair–Chun

doi:10.1109/jlt.2011.2164055

Cited by 12 publications

(2 citation statements)

References 14 publications

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“…It plays the role of protecting, testing, monitoring, and management of the network. The thermal optical (TO) switch, as the important part of the optical switch, acts a pivotal part in showing great promise in low-speed fiber-optic communication systems [1,2,3]. At present, the wavelengths of the reported thermal optical switches are mostly at 1550 nm and 650 nm, and the thermal optical switch working at 650 nm is mainly used in short-range communication system [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Polymer M-Z Thermal Optical Switch at 532-nm Based on Wet Etching and UV-Writing Waveguide

Cao

Lin

et al. 2019

Polymers

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Polymer thermal optical switches have low power consumption and 532 nm is the communication window of polymer fiber. Polymer thermal optical switches at 532 nm are rarely reported, because of switching extinction ratio properties that are restricted by modes of the waveguide. Single mode waveguide at 532 nm is hard to fabricate due to the dissolution of core and cladding materials. A polymer M-Z thermal optical switch at 532 nm was first demonstrated based on the wet etching method. The proposed thermal optical switch was consisted of silica substrate, photosensitive polymer core, and cladding material. The device was fabricated and tested with the power consumption of 6.55mW, extinction of 4.8 dB, and switching time of 0.23 ms (rise)/0.28 ms (down). An optimized switch structure combining with the UV-writing technique and graphene thermal conduction layer was proposed based on the experiments above. A side electrode was designed to reduce the power consumption and the switching time. The optimized device was calculated to have a power consumption of 1.5 mW. The switching time of the UV-writing device was simulated to be 18.2 μs (rise) and 85 μs (down). The device is promising in the wearable device and laser radar area.

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Section: Introductionmentioning

confidence: 99%

Polymer M-Z Thermal Optical Switch at 532-nm Based on Wet Etching and UV-Writing Waveguide

Cao

Lin

et al. 2019

Polymers

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“…Arrayed waveguide grating (AWG) also called waveguide grating routers (WGR) or phased arrays (PHASAR), has long been used as (de)multiplexer in fibreoptic communications. In recent years, AWG has been a critical component in integrated photonic systems [17,105,127], with applications ranging from (de)multiplexers, add-drop filters [128] to N × M wavelength routing. It has also been adopted as on-chip spectrometers [18,19,21,31,117,119,121].…”

Section: On-chip Dispersive Spectrometersmentioning

confidence: 99%

On-chip spectrometer : design, fabrication and experiment

Zheng¹

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This doctorate thesis focuses on the design, fabrication and experimental characterization of novel on-chip spectrometers. Specifically, two different types of on-chip spectrometer have been designed, fabricated and experimentally demonstrated. Fabrication processes based on nano-silicon-photonic (NSP) fabrication technology are developed. The first part of the thesis reports an on-chip spectrometer called predispersed spectrometer with both high resolution and large bandwidth using thermally tunable microring resonator (MRR) array with an arrayed waveguide grating (AWG) before the MRR array. The AWG functions as a fixed filter to predisperse the input spectrum while the following tunable MRRs retrieve the corresponding dispersed spectra with high resolution. By adoption of AWG before the tunable MRR array, the working spectral band can be broadened while maintaining final resolution of the spectrometer due to that the resonance wavelength of MRR can be finely tuned. Besides, the tunable MRR array has much higher fabrication tolerance and is more compact compared to the approaches using the stationary microring resonators array. The pre-dispersed spectrometer achieves high resolution (0.1 nm) and large bandwidth (27 nm) within only 9 channels in a compact size of 3 × 3 mm 2. The model of MRR thermal tuning exploiting thermo-optic (TO) effect is built and theoretically analysed. Heater optimization and thermal isolation trenches are implemented to improve the heating efficiency. The second part of the thesis focuses on the development of a microring resonator-assisted Fourier-transform (RAFT) spectrometer. In this design, Fouriertransform (FT) spectrometer is realized with a thermally tunable photonic Mach-Summary xi Zehnder interferometer (MZI). A microring resonator with high quality factor is cascaded before the Mach-Zehnder interferometer to pre-filter the input spectrum while the MZI is exploited to reconstruct the pre-filtered spectra. The proposed RAFT spectrometer has both high resolution (0.47 nm) and very large bandwidth (90 nm) due to the large transparency widow of Mach-Zehnder interferometer and high quality factor (Q) of microring resonator. It has a small footprint of 2.2 mm 2. The model of MZI thermal tuning exploiting TO effect is built and theoretically analysed. Low-loss Si rib waveguide is designed, fabricated and experimentally tested to reduce insertion loss and improve resolution. A low loss rate of 0.1 dB/m is experimentally tested. Thermal isolation trenches are implemented and experimentally tested to reduce thermal consumption and thermal crosstalk. The third part of the thesis focuses on the development of core fabrication technology of nano-silicon-photonic fabrication technology, including silicon strip waveguide, inverse taper fibre-chip coupler, rib waveguides, directional couplers, and titanium nitride (TiN) heaters and thermal isolation trenches. Si3N4 strip waveguide, microring resonator, and directional coupler are also designed and fabricated. The fabrication processes are deve...

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Novel cobweb-topology WDM access network architecture featuring ultra-high reliability and easy scalability

Gong

Gan

et al. 2013

Opt Quant Electron

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Demonstration of a ROADM Using Cyclic AWGs

Cited by 12 publications

References 14 publications

Polymer M-Z Thermal Optical Switch at 532-nm Based on Wet Etching and UV-Writing Waveguide

Polymer M-Z Thermal Optical Switch at 532-nm Based on Wet Etching and UV-Writing Waveguide

On-chip spectrometer : design, fabrication and experiment

Novel cobweb-topology WDM access network architecture featuring ultra-high reliability and easy scalability

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