Ad
related to: coarse wavelength multiplex spectrum
Search results
Results From The WOW.Com Content Network
Coarse wavelength-division multiplexing (CWDM), in contrast to DWDM, uses increased channel spacing to allow less sophisticated and thus cheaper transceiver designs. To provide 16 channels on a single fiber, CWDM uses the entire frequency band spanning the second and third transmission windows (1310/1550 nm respectively) including the critical ...
Managed dark fibre is a form of wavelength-division multiplexed access to otherwise dark fibre where a pilot signal is beamed into the fibre by the fibre provider for management purposes using a transponder tuned to an assigned wavelength. Virtual dark fibre using wavelength multiplexing allows a service provider to offer individual wavelengths ...
CWDM – coarse wavelength-division multiplexing; D. DBR – distributed Bragg reflector; DCM – dispersion-compensation module [citation needed] or double-chirped ...
This differs from WDM system transponders, including both coarse and dense wavelength-division multiplexing systems (CWDM and DWDM) that currently support OC-192 SONET signals, which can normally support thin-SONET–framed 10 Gigabit Ethernet.
It uses four separate laser sources operating at 3.125 Gbit/s and Coarse wavelength-division multiplexing with four unique wavelengths around 1310 nm. Its 8b/10b PCS is defined in IEEE 802.3 Clause 48 and its Physical Medium Dependent (PMD) sublayer in Clause 53.
Arrayed waveguide gratings (AWG) are commonly used as optical (de)multiplexers in wavelength division multiplexed (WDM) systems. These devices are capable of multiplexing many wavelengths into a single optical fiber, thereby increasing the transmission capacity of optical networks considerably.
In this context, multiplexing is provided by the physical layer. A channel access method may also be a part of the multiple access protocol and control mechanism, also known as medium access control (MAC). Medium access control deals with issues such as addressing, assigning multiplex channels to different users and avoiding collisions.
Code-division multiplexing (CDM), code-division multiple access (CDMA) or spread spectrum is a class of techniques where several channels simultaneously share the same frequency spectrum, and this spectral bandwidth is much higher than the bit rate or symbol rate. One form is frequency hopping, another is direct sequence spread spectrum.