Browsing by Author "Lin, Chinlon"

Now showing 1 - 4 of 4

Rayleigh Noise Mitigation Using Single-Sideband Modulation Generated by a Dual-Parallel MZM for Carrier Distributed PON
(2010-06-01)
Wang, C. H.
;
Chow, C. W.
;
Yeh, C. H.
;
Wu, C. L.
;
Chi, S.
Hybrid passive optical networks (PONs) with a centralized light source (CLS) could be a promising solution for the next-generation PON. However, the network with a loop-back architecture will give rise to interferometric noise caused by Rayleigh backscattering (RB). Here, we propose and demonstrate a colorless optical networking unit (ONU) using a dual-parallel Mach-Zehnder modulator (DP-MZM) to mitigate RB noise in a hybrid wavelength-division-multiplexing-time-division-multiplexing PON with CLS. Both dominant contributions of RB, carrier RB and signal RB, are experimentally characterized, for the first time, when using a DP-MZM as a reflective ONU. In addition, the split-ratio of a long-reach PON using the DP-MZM-based ONU is also investigated and analyzed, showing RB noise can be efficiently reduced.
Spectral Response of Long Period Fiber Grating based on Tapered Fiber with Side-Contacted Metal Grating
(2008)
Hsu, Kuei-Chu
;
Chen, Nan-Kuang
;
Lee, Cheng-Ling
;
Jhuang, Pei-Jhen
;
Chih, Yu-Syun
A simple long-period fiber grating structure using a tapered fiber side-contacted with a metal grating is proposed and demonstrated. The temperature/index tuning sensitivity can be enhanced and the un-usual spectral response of decreasing phase-matching wavelength with respect to increasing temperature has been observed.
Spectral Response of Long-Period Fiber Grating Based on Tapered Fiber With Side-Contacted Metal Grating
(2010-04-01)
Hsu, Kuei-Chu
;
Chen, Nan-Kuang
;
Lee, Cheng-Ling
;
Chih, Yu-Syun
;
Jhuang, Pei-Jhen
A new long-period fiber grating structure based on a tapered fiber side contacted with a metal grating is proposed and demonstrated in this paper. The temperature/ index tuning sensitivity can be enhanced, and the unusual spectral response of decreasing phase-matching wavelength with respect to increasing grating period and temperature is observed.
Studies of OFDM Signal for Broadband Optical Access Networks
(2010-08-01)
Chow, C. W.
;
Yeh, C. H.
;
Wang, C. H.
;
Wu, C. L.
;
Chi, S.
Using orthogonal-frequency-division-multiplexing (OFDM) format for passive optical network (PON) is a subject of great interest for recent research works. OFDM signal has high spectral efficiency, high tolerance to the fiber chromatic dispersion and the high flexibility on both multiple services provisioning and dynamic bandwidth allocation. In this paper we study the use of OFDM signals for optical access networks, including carrier distributed PON, heterogeneous optical wired/wireless network and a 100 Gb/s OFDM-PON. We first quantify the performance of the OFDM signal when subjected to the noise produced by two different Rayleigh backscattering (RB) components that are present in the carrier-distributed PON. Then, based on these results, we also study the possibility of using OFDM for signal remodulation in a long-reach (LR)-PON. We propose carrier-distributed OFDM PONs using a dual-feeder fiber architecture and wavelength-shifting to mitigate the RB noise. Afterwards, we propose heterogeneous optical wired/wireless access networks, combining 10 Gb/s PON and 10 Gb/s OFDM radio-over-fiber (ROF) network. Finally, we propose a 100 Gb/s OFDM-PON using subcarrier multiplexing (SCM).