Wavelength Division Multiplexing
E719381
Wavelength Division Multiplexing is a fiber-optic transmission technique that increases bandwidth by sending multiple data channels simultaneously over different light wavelengths on the same optical fiber.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Coarse Wavelength Division Multiplexing | 1 |
| Wavelength Division Multiplexing canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8204436 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Wavelength Division Multiplexing Context triple: [SONET, relatedConcept, Wavelength Division Multiplexing]
-
A.
WDM
WDM is the National Rail station code for Windermere railway station in Cumbria, England.
-
B.
Frequency Division Multiple Access
Frequency Division Multiple Access (FDMA) is a channel access method in which the available bandwidth is divided into distinct frequency bands so multiple users can transmit simultaneously on different frequencies.
-
C.
erbium-doped fiber amplifier
An erbium-doped fiber amplifier is an optical device that boosts the strength of light signals in fiber-optic communication systems by using erbium ions in the fiber core to provide efficient, low-noise signal amplification.
-
D.
Frequency Division Duplex
Frequency Division Duplex is a communication method in which uplink and downlink transmissions occur simultaneously on separate frequency bands, commonly used in cellular and wireless networks.
-
E.
ITU-T G.983 series
The ITU-T G.983 series is a set of international standards that define the first-generation broadband passive optical network (BPON) systems for delivering high-speed telecommunications services over fiber.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Wavelength Division Multiplexing Target entity description: Wavelength Division Multiplexing is a fiber-optic transmission technique that increases bandwidth by sending multiple data channels simultaneously over different light wavelengths on the same optical fiber.
-
A.
WDM
WDM is the National Rail station code for Windermere railway station in Cumbria, England.
-
B.
Frequency Division Multiple Access
Frequency Division Multiple Access (FDMA) is a channel access method in which the available bandwidth is divided into distinct frequency bands so multiple users can transmit simultaneously on different frequencies.
-
C.
erbium-doped fiber amplifier
An erbium-doped fiber amplifier is an optical device that boosts the strength of light signals in fiber-optic communication systems by using erbium ions in the fiber core to provide efficient, low-noise signal amplification.
-
D.
Frequency Division Duplex
Frequency Division Duplex is a communication method in which uplink and downlink transmissions occur simultaneously on separate frequency bands, commonly used in cellular and wireless networks.
-
E.
ITU-T G.983 series
The ITU-T G.983 series is a set of international standards that define the first-generation broadband passive optical network (BPON) systems for delivering high-speed telecommunications services over fiber.
- F. None of above. chosen
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
Fiber-optic transmission technique
ⓘ
Multiplexing technique ⓘ Optical communication technology ⓘ |
| advantage |
Efficient use of installed fiber infrastructure
ⓘ
Higher aggregate data rate on a single fiber ⓘ Scalability by adding wavelengths ⓘ |
| alsoKnownAs | WDM ⓘ |
| appliesTo |
Access networks
ⓘ
Data center interconnects ⓘ Long-haul optical networks ⓘ Metro optical networks ⓘ Telecommunications networks ⓘ
linked to:
Main Telecommunication Network
|
| basedOn |
Optical frequency division
ⓘ
Wavelength separation ⓘ |
| comparedWith |
Frequency Division Multiplexing
ⓘ
Time Division Multiplexing ⓘ
linked to:
Time Division Multiple Access
|
| compatibleWith |
Multimode fiber
ⓘ
Single-mode fiber ⓘ |
| enables | Simultaneous transmission of multiple data channels ⓘ |
| hasVariant |
CWDM
ⓘ
Coarse Wavelength Division Multiplexing ⓘ
linked to:
Wavelength Division Multiplexing
DWDM ⓘ Dense Wavelength Division Multiplexing ⓘ Ultra-dense Wavelength Division Multiplexing ⓘ WDM-PON ⓘ
linked to:
NG-PON2
|
| increases | Bandwidth ⓘ |
| multiplexes |
Multiple optical carrier signals
ⓘ
Multiple wavelengths of light ⓘ |
| operatesIn |
C-band
ⓘ
L-band ⓘ S-band ⓘ |
| requires |
Channel spacing planning
ⓘ
Optical power management ⓘ Precise wavelength control ⓘ |
| subjectOf |
ITU-T G.694.1 recommendation
ⓘ
ITU-T G.694.2 recommendation ⓘ |
| usedFor |
5G transport networks
ⓘ
Enterprise optical networks ⓘ High-capacity backbone links ⓘ Undersea fiber-optic cables ⓘ |
| usesComponent |
Arrayed waveguide grating
ⓘ
Erbium-doped fiber amplifier ⓘ
linked to:
erbium-doped fiber amplifier
Muxponder ⓘ Optical add-drop multiplexer ⓘ Optical amplifiers ⓘ Optical demultiplexer ⓘ Optical filters ⓘ Optical multiplexer ⓘ ROADM ⓘ Reconfigurable optical add-drop multiplexer ⓘ Transponders ⓘ |
| usesMedium |
Fiber-optic cable
ⓘ
Optical fiber ⓘ |
| usesProperty | Different wavelengths carry independent channels ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Wavelength Division Multiplexing Description of subject: Wavelength Division Multiplexing is a fiber-optic transmission technique that increases bandwidth by sending multiple data channels simultaneously over different light wavelengths on the same optical fiber.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Wavelength Division Multiplexing