Browsing by Author "Shih, Fu Yuan"

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Cost-effective wavelength-tunable fiber laser using self-seeding Fabry-Perot laser diode
(2008-01-07)
Yeh, Chien Hung
;
Shih, Fu Yuan
;
Wang, Chia Hsuan
;
Chow, Chi Wai
;
Chi, Sien
We propose and experimentally demonstrate a continuous wave (CW) tunable-wavelength fiber laser using self-seeding Fabry-Perot laser diode (FP-LD) without optical amplifier inside gain cavity. By employing a tunable bandpass filter (TBF) and a fiber reflected mirror (FRM) within a gain cavity, the fiber laser can lase a single-longitudinal wavelength due to the self-seeding operation. The proposed tunable wavelength laser has a good performance of the output power (> -15 dBm) and optical side-mode suppression ratio (> 40 dB) in the wavelength tuning range of 1533.75 to 1560.95 nm. In addition, the output stabilities of the fiber laser are also investigated. (c) 2007 Optical Society of America.
Triple-wavelength erbium fiber ring laser based on compound-ring scheme
(2007-12-24)
Yeh, Chien Hung
;
Shih, Fu Yuan
;
Chen, Chang Tai
;
Chi, Sien
;
光電工程學系
A triple-wavelength erbium-doped compound ring fiber laser using the fiber-based triple-ring filter (TRF) is proposed and experimentally investigated. Using the fiber-based TRF laser scheme, the proposed laser can lase three wavelengths simultaneously. The fiber laser retrieve the optical side-mode suppression ratios (SMSRs) of 40.2, 40.4 and 41.6 dB and the output powers of -9, -8.8 and -7.6 dBm at the wavelengths 1555.89, 1556.77 and 1557.66 nm, respectively. The mode spacing of the triple-wavelength fiber laser is nearly 0.9 nm. Moreover, the output power stability of the ring laser has also been measured and analyzed. (c) 2007 Optical Society of America.
Utilization of self-injection Fabry-Perot laser diode for long-reach WDM-PON
(2010-01-01)
Shih, Fu Yuan
;
Yeh, Chien Hung
;
Chow, Chi Wai
;
Wang, Chia Hsuan
;
Chi, Sien
In this investigation we propose and demonstrate a wavelength widely tunable laser source employing a self-injected Fabry-Perot laser diode (FP-LD) for long-reach wavelength-division-multiplexed passive optical network (WDM-PON). By using a tunable bandpass filter and an optical circulator inside the gain cavity, a stable and single-longitudinal-mode (SLM) laser output is achieved. Besides, the proposed laser sources are directly modulated at 2.5 Gb/s for both downlink and uplink transmissions of 85 km single mode fiber (SMF) in PON without dispersion compensation. (c) 2009 Elsevier Inc. All rights reserved.