Browsing by Author "Wong, C. Y."

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Frequency Quadrupling of Phase Modulated Signals
(2010-01-01)
Xu, L.
;
Li, C.
;
Chow, C. W.
;
Chen, X.
;
Wong, C. Y.
we demonstrate optical up-conversion with frequency quadrupling using an optical phase modulator and a flat-top silicon microresonator filter by beating two second order sidebands at photodetector. 14GHz signal was achieved using 3.5GHz RF components.
Stable and wavelength-tunable silicon-micro-ring-resonator based erbium-doped fiber laser
(2013-02-11)
Yang, L. G.
;
Yeh, C. H.
;
Wong, C. Y.
;
Chow, C. W.
;
Tseng, F. G.
In this work, we propose and demonstrate a stable and wavelength-tunable erbium-doped fiber (EDF) ring laser. Here, a silicon-on-insulator (SOI)-based silicon-micro-ring-resonator (SMRR) is used as the wavelength selective element inside the fiber ring cavity. A uniform period grating coupler (GC) is used to couple between the SMRR and single mode fiber (SMF) and serves also as a polarization dependent element in the cavity. The output lasing wavelength of the proposed fiber laser can be tuned at a tuning step of 2 nm (defined by the free spectral range (FSR) of the SMRR) in a bandwidth of 35.2 nm (1532.00 to 1567.20 nm), which is defined by the gain of the EDF. The optical-signal-to-noise-ratio (OSNR) of each lasing wavelength is larger than 42.0 dB. In addition, the output stabilities of power and wavelength are also discussed. (C) 2013 Optical Society of America