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A double-conversion optical frequency shifter that uses two four-channel-pumping multiple-quasi-phase-matched LiNbO3 wavelength converters is described. Ten different outputs were obtained by varying the combination of pump wavelengths of the two wavelength converters. [ABSTRACT FROM AUTHOR]

A quasi-phase-matched LiNbO[SUB3] wavelength converter using a ZnO-doped substrate is reported. The normalised conversion efficiency of 450%/W is obtained. Owing to the converter's high damage resistance, difference frequency generation conversion efficiency of-1 dB is achieved at 80deg;C. [ABSTRACT FROM AUTHOR]

Discusses the preparation of a quasi-phase matched LiNbO[sub 3] ridge waveguide using the direct bonding technique. Second-harmonic generation and wavelength conversion based on difference frequency generation; High resistance to photorefractive damage; Second-harmonic generation and difference frequency generation spectrum.

A wavelength conversion module for 3.4 µm difference frequency generation employing the V-groove connection technique has been fabricated. Using a 1.064 µm pump and a 1.55 µm band signal, an external conversion efficiency of 9.7%/W was obtained. The fabricated module exhibits a high output power of up to 3 mW. [ABSTRACT FROM AUTHOR]

A novel optical loop configuration based on quasi-phase-matched LiNbO3 waveguides for wavelength conversion and multi-carrier generation on an optical frequency grid is proposed. It has fast wavelength switching time and supports the conversion of multi- channel signals. The basic principle is successfully demonstrated with total bandwidth of 20 nm in longer and shorter wavelength sides. [ABSTRACT FROM AUTHOR]

A periodically poled LiNbO[SUB3] (PPLN) waveguide that simultaneously) converts the wavelengths of 25 GHz-spaced, 1.03 Tbit/s (103 × 10 Gbit/s) DWDM signals, from C-band to L-band, with the small guard band of 8 nm (4 nm × 2) is shown. The converted signals have Q-factors of at least 15.6 dB. [ABSTRACT FROM AUTHOR]