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Fiber 歡迎蒞臨

Welcome to
National Tsing Hua University
Optical Fiber Communication Laboratory!

OFCL was established in 2003. We are interested in integration between optics and communication such as high capacity optical fiber communication systems, optical switching networks and optical modulation formats. Both simulations and experiments are being developed and studied. If you have a passion for exploring the bright and dazzling world, join us!
All Optical Switching System
To reduce the scale of complexity and to increase the variability, a simpler wavelength routing OPS architecture composed of tunable wavelength converters, wideband optical filters, and an arrayed waveguide grating has been proposed and experimentally demonstrated. As a result, simpler traffic control and multi-function of packet switching, multiplexing, de-multiplexing, and add/drop were achieved with prescribed wavelength arrangement.
OFDM (Orthogonal frequency-division multiplexing) 

OFDM (orthogonal frequency division multiplexing) is a technology that is widely applied in may communication systems, such as: xDSL, DVB-H, WiMax, ..., etc. By dividing a high speed channel into many low speed subchannels, OFDM can greatly reduce signal’s vulnerability from fiber dispersion, PMD and nonlinearities. In addition, with the advance of modern electronic technologies, by using OFDM technology, it’s much easier to generate high efficient QAM signals without using complicated optical modulators/demodulators.

Since the first paper demonstrated the feasibility of using OFDM in multi-mode fiber communication system in the end of 2005, numerous optical OFDM communication systems had been brought out.


Smart Sensing Network
We propose a mesh sensing system to support more comprehensive sensing area and self-healing functionality by assigning and arranging the Bragg wavelengths of FBGs and composing three 2x2 switches to realize the links and nodes of the mesh topology, respectively. In addition, for the analysis of complicated sensing signals, we also propose a simple and cost-effective solution to classify and analyze the signals from the sensing system using the passive characteristics of arrayed waveguide, cyclic filtering and free spectral range. Moreover, since the proposed architecture is always regular and duplicate in frame, the mesh sensing system can be modified and extended to fit sensing areas of any shape.