Bidirectional HDTV/Gigabit Ethernet/CATV over hybrid dense-wavelength-division-multiplexing passive optical network
(DWDM-PON) based on injection-locked vertical cavity surface emitting lasers (VCSELs) and distributed feedback (DFB)
laser diodes as transmitters were proposed and demonstrated. Services with 129 HDTV channels, 1.25 Gb/s Gigabit Ethernet
connection, and 77 CATV channels were successfully demonstrated over 40 km single-mode fiber (SMF) links. Good
performance of bit error rate (BER)/carrier-to-noise ratio (CNR)/composite second order (CSO)/composite triple beat (CTB)
were achieved in our proposed bidirectional DWDM-PON.
A radio-on-dense-wavelength-division-multiplexing (DWDM) transport system for personal handy system (PHS)/vehicle
information and communication system (VICS)/electronic toll collection (ETC)/satellite broadcasting (SB) applications was
proposed and demonstrated. Improved performance of bit error rate (BER) over a-100 km of large effective area fiber (LEAF)
was obtained. Signal qualities meet the PHS demand with a data signal of 1.9GHz/10Mbps, VICS demand with a data signal
of 2.5GHz/12Mbps, ETC demand with a data signal of 5.8GHz/20Mbps, and SB demand with a data signal of
12GHz/25Mbps.
A radio-on-DWDM transport system based on injection-locked Fabry-Perot laser diodes (FP LDs) and large effective area
fiber (LEAF) transmission was proposed and demonstrated. Improved performance of bit error rate (BER) over a-50 km of
LEAF was obtained. Signal qualities meet the personal handy system (PHS) demand with a data signal of 1.9GHz/10Mbps,
vehicle information and communication system (VICS) demand with a data signal of 2.5GHz/12Mbps, electronic toll
collection (ETC) demand with a data signal of 5.8GHz/20Mbps, and satellite broadcasting (SB) demand with a data signal of
12GHz/25Mbps.
A bidirectional dense wavelength-division multiplexing (DWDM) passive optical network (PON) based on injection-locked vertical-cavity surface-emitting lasers and a data comparator is proposed and demonstrated. Improved performance with respect to bit error rate and eye diagram was observed. Bidirectional transmission in DWDM-PON architecture is a very attractive option; the capacity of the optical network can be expanded relatively easily in that way.
A full-duplex radio-on-fiber (ROF) transport system based on wavelength division multiplexing (WDM) and optical add-drop multiplexing techniques, as well as employing a simple fiber Bragg grating (FBG) filter at the receiving site, is proposed and demonstrated. Over a long-haul fiber link, good transmission performance is obtained in our proposed systems. Since our proposed system does not use a sophisticated optical single sideband (SSB) transmitter, it reveals a prominent alternative with advantages in simplicity and cost. Such a proposed full-duplex ROF transport system is suitable for the long-haul microwave optical link.
A hybrid wavelength-division-multiplexing transport system based on 1.3-µm optical transmitters and praseodymium-doped fiber amplifiers is proposed and demonstrated. It uses one wavelength for AM vestigial-sideband CATV, one wavelength for 256-QAM digital passband, and one wavelength for OC-48 digital baseband signals. Good performance with respect to composite second order and composite triple beat has been obtained at an acceptable carrier-to-noise ratio for CATV; and a low bit error rate has been achieved for 256-QAM and OC-48 digital signals over a 70-km single-mode fiber transport.
We propose and demonstrate an L-band two-wavelength wavelength-division-multiplexing (WDM) transport system employing chirped fiber gratings (CFGs) to reduce the cross-phase modulation-induced crosstalk, and using dispersion compensation fiber (DCF) to reduce the fiber dispersion. Good performances of composite second order and composite triple beat were obtained accompanied by acceptable carrier-to-noise ratio in our proposed systems.
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