Patent
Wavelength-division-multiplexed passive optical network
TLDR
In this paper, a wavelength division multiplexing passive optical network including optical lines for link is described, where changes in the wavelength of each of the upstream optical signals are monitored and if there is an abnormality in each optical line by using relevant monitoring signals.Abstract:
A wavelength division multiplexing passive optical network including optical lines for link is disclosed. The passive optical network includes a plurality of optical network units each of which generates an upstream optical signal; a central office for generating downstream optical signals to be provided to each of the optical network units, and differentially converting each of the upstream optical signals into a monitoring signal and a received signal. Changes in the wavelength of each of the upstream optical signals are monitored and if there is an abnormality in each optical line by using relevant monitoring signals. The network also includes a remote node for multiplexing and outputting the upstream optical signals to the central office, and demultiplexing and outputting the downstream optical signals to corresponding optical network units.read more
Citations
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Intelligent optical systems and methods for optical-layer management
TL;DR: In this paper, an integrated optical transceiver includes an optical receiver that produces a first electrical signal at a reception electrical interface in response to a first optical signal, an optical transmitter that emits a second optical signal to a second electrical signal received at a transmission electrical interface.
Patent
Methods and devices for wavelength alignment in wdm-pon
TL;DR: In this article, an optical network unit for a passive optical network (10) is configured to initiate an upstream wavelength (wus) for an upstream signal (US) from the optical unit to an optical line terminal (10); iteratively, until an iteration criterion is met, i) transmit the upstream signal(US) to the optical line node (10), ii) receive from the OLSI power level data (p) as measured by the OP, and iii) set the upstream wus for the OP to a new wavelength-value; and adjust the OP
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TL;DR: In this paper, an integrated optical transceiver includes an optical subassembly that produces a first electrical signal in response to a first optical signal comprising reception signal data and to emit a second optical signal consisting transmission signal data in response of a second electrical signal.
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Wavelength division multiplexing-passive optical network using external seed light source
TL;DR: In this article, a reflective semiconductor optical amplifier (RSOA) is used as each optical transmitter of an optical line termination (OLT) and an optical network unit (ONU) and additional spectrum-sliced light is injected into RSOAs of each of the OLT and the ONU, by which the number of included ONUs increases and conventional TDMA ONUs can be used.
References
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Patent
Bidirectional WDM optical communication systems with bidirectional optical amplifiers
TL;DR: In this article, the authors proposed a bidirectional WDM optical communication system, which includes two sets of optical transmitters for respectively creating a set of west-east optical channels and counter-propagating east-west optical channels.
Patent
Remodulating channel selectors for WDM optical communication systems
TL;DR: In this article, a remodulating channel selector for a wavelength division multiplexed optical communication system is presented. But the selection of the optical channel is not a trivial task, since the wavelength of the output optical signal can be the same as or different from the optical channels which comprise the input signal.
Patent
Wavelength division multiplexing-passive optical network system
Soo-Jin Park,Kil Ho Song +1 more
TL;DR: In this paper, a light source provider configured to wavelength-division multiplexing-passive optical network (WDM-PON) is presented, which includes a laser light source of a wavelength allotted to each subscriber and optical-power-divide the multiplexed light source, a plurality of optical line terminals each configured to transmit a light-source for upward signal with the power-divided light source and convert an upward optical signal into an electric signal, and a multiplexer/demultiplexer configured to separate the signal source for the upward signal
Patent
Integration of laser sources and detectors for a passive optical network
Wayne V. Sorin,Ben J. Vakoc +1 more
TL;DR: In this paper, various methods and apparatuses are described in which an array of optical gain mediums capable of lasing are contained in a single integral unit, such as a first multiplexer/demultiplexer.
Patent
Bidirectional lightwave transmission system
Peter P. Bohn,Thomas H. Wood +1 more
TL;DR: In this article, a bidirectional, noninterfering transmission of broadband services on a single fiber is accomplished by simultaneously combining wavelength-division, time-division and subcarrier multiplexing on the downstream and upstream transmissions.