Bidirectional Hybrid DWDM-PON for HDTV/Gigabit Ethernet/CATV Applications

Abstract

A new scheme for bi‐directional HDTV/Gigabit Ethernet/CATV transmission over a hybrid dense‐wavelength‐division‐multiplexing passive optical network (DWDM‐PON) is proposed and demonstrated. It is based on injection‐locked vertical‐cavity surface‐emitting lasers and distributed‐feedback laser diodes as transmitters. Services with 129 HDTV channels, a 1.25 Gbps Gigabit Ethernet connection, and 77 CATV channels are successfully demonstrated over 40 km single‐mode fiber links. Good performance of bit error rate, carrier‐to‐noise ratio, composite second order, and composite triple beat is achieved in our proposed bidirectional DWDM‐PON.

Channel Enlargement of PON System Using Nonreciprocal Multiplexing Filter Based on CWDM

“…As a large number of ONUs share an optical line terminal (OLT) and an installed fiber, the cost of a PON system can be reduced in inverse proportion to the number of ONUs. To increase the number of ONUs connected to an OLT, TDM-PON systems and hybrid wavelength division multiplexing (WDM)/TDM-PON systems are being developed [2]- [5]. A TDM-PON system [2] and WDM/TDM system [3], of which one OLT is shared by 1,024 and 512 ONUs, respectively, have been demonstrated.…”

“…It can reduce the power budget of the upstream and increase the number of ONUs by 3 to 4 times. Although WDM-PON and WDM/ TDM-PON offer an alternative method to increase the number of ONUs [4], [5] both network types based on a dense WDM-PON require the technology to avoid the need for expensive wavelength-selective optical components in each ONU. Both systems have many transmitters and receivers in the OLT;…”

Novel Planar Metamaterial with a Negative Refractive Index

“…the number of ONUs. To increase the number of ONUs connected to an OLT, TDM-PON systems and hybrid wavelength division multiplexing (WDM)/TDM-PON systems are being developed [2]- [5]. A TDM-PON system [2] and WDM/TDM system [3], of which one OLT is shared by 1,024 and 512 ONUs, respectively, have been demonstrated.…”

Simultaneous transmission of <inline-formula><math display="inline" overflow="scroll"><mrow><mn>2.5</mn><mtext>-</mtext><mi>Gb</mi><mo>∕</mo><mi mathvariant="normal">s</mi></mrow></math></inline-formula> baseband and <inline-formula><math display="inline" overflow="scroll"><mrow><mn>5.8</mn><mtext>-</mtext><mi>GHz</mi></mrow></math></inline-for

“…One is the wavelength division multiplexing method, 3,4 which can multiplex multiple optical carrier signals to carry different signal bands. Another is the mixed-signal multiplexing method, 5,6 which can multiplex multiple RF signals and baseband data streams electrically.…”