Browsing by Author "Huang, Ting-Tsan"

Now showing 1 - 3 of 3

All-Optical Gain-Clamped Erbium-Doped Fiber Amplifier Using a DWDM Demultiplexer
(2009-01-01)
Huang, Ting-Tsan
;
Sheu, Lih-Gen
;
Chi, Sien
;
光電工程學系
;
Department of Photonics
A simple gain-clamped erbium-doped fiber amplifier using a DWDM demultiplexer is proposed. The amplified DWDM signals are separately exported without the lasing power, while the low noise-figure is obtained.
Measurement of multi-wavelength optical amplifier by using the I/O power-curve fitting technique
(2009-06-15)
Huang, Ting-Tsan
;
Sheu, Lih-Gen
;
Chi, Sien
;
光電工程學系
;
Department of Photonics
A low-cost and accurate measurement scheme for characterizing multi-wavelength optical amplifiers is experimentally demonstrated by using an amplified spontaneous emission source and a DWDM multiplexer. By linearly fitting the input and output optical spectral densities, the gain and noise figure of the optical amplifier are determined. The measured results agree well with the data obtained by time-domain-extinction method. (C) 2009 Elsevier B.V. All rights reserved.
Optical power equalization for upstream traffic with injection-locked Fabry-Perot lasers in TDM-PON
(2010-10-15)
Huang, Ting-Tsan
;
Sheu, Lih-Gen
;
Chi, Sien
;
光電工程學系
;
Department of Photonics
An optical power equalization of upstream traffic in time-division-multiplexed passive optical network (TDM-PON) based on injection-locked Fabry-Perot lasers has been experimentally investigated. The upstream transmitters with stable spectrum are achieved by using an external injection light source in the optical line terminal (OLT). The different upstream powers can be equalized by injection locking a Fabry-Perot laser diode (FP-LD) biased below threshold current in OLT. The dynamic upstream power range from -8.5 to -19.5 db m is reduced to a 1.6 dB maximal power variation, when the uplink signal is directly modulated at 1.25 Gb/s. (C) 2010 Elsevier B.V. All rights reserved.