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Large-area split ring resonator (SRR) array was fabricated by femtosecond laser micro-lens array lithography at a fast speed. Transmission spectra of the SRR arrays at different incident terahertz wave polarization states were characterized by terahertz time domain spectroscopy. A polarization-dependent transmission property of the SRR array was observed. Polarization-dependent loss (PDL) spectrum was characterized to investigate the polarization properties of the terahertz metamaterials. The PDL characterization can eliminate the substrate effect and provide a flexible platform to study the characteristics of free-standing terahertz metamaterials. [ABSTRACT FROM AUTHOR]

Wideband terahertz (THz) wave generation and detection technologies and 1550-nm ultrafast laser technologies are presented. The usage of a 1550-nm ultrafast fiber laser will make the THz time domain spectroscopy system a more compact one with much lower costs. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 439–443, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22165 [ABSTRACT FROM AUTHOR]

A novel multiwavelength SOA ring laser and a linear cavity multiwavelength laser are proposed and demonstrated experimentally. Stable multiwavelength lasing operation with about 100 GHz channel spacing is achieved with both lasers. Up to ten stable lasing wavelengths with an OSNR greater than 40 dB are obtained with an equalized peak power. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1981–1984, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21821 [ABSTRACT FROM AUTHOR]