By M.O. van Deventer
Bidirectional transmission over optical fibre networks may perhaps yield a wide fee aid due to the aid of the community infrastructure by way of an element and the aptitude price relief by way of an built-in transceiver layout. it could possibly additionally supply an economical option to improve distribution networks via including bidirectional channels.
This booklet is the 1st to supply a complete assessment of bidirectional transmission in optical networks. It handles
Audience:This e-book is aimed toward designers, developers and operators of optical networks, e.g. the brands of optical transmission platforms, public-network operators, builders of local-area networks, cable-television operators, etcetera. The meant point of readership is graduate point in physics or electric engineering.
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Extra resources for Fundamentals of Bidirectional Transmission over a Single Optical Fibre
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This spectroscope can be stabilised to an absolute reference (not in the demonstrator). The localoscillator lasers at the subscriber are locked to the incoming light from the 43 2. Network aspects Coherent Detection. 1537 nm 16 x 16 Optical Star Direct Detection. ;:u QJ transmit ter D. -- centraL office t~ b) DA Fig. 21 t~ DA t~ DA " E B Fe subscriber E B Fe a) Network topology of COSNET. a .. 571. courtesy ECOC). (stabilised) transmitters. The transmitter and local-oscillator lasers of the upstream links (from subscriber to local exchange) are frequency locked to the downstream lasers.
Reference frequency comb. fixed Fabry-Perot fIlter). 0: methods that check the frequency-error periodically (scanning Fabry-Perot interferometer. scanning heterodyne spectroscope). g. optical CATV). g. g. local-area networks). In that case some parts of the stabilisation system have to be duplicated at the different locations, and all systems must be locked to a common reference (either a local atomic reference or a reference frequency that is distributed over the network). This will require much extra hardware, especially when there are many locations, each having only one or a few transmitters.