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Crosstalk evaluations of optical add/drop multiplexer in WDM-ring networks

: Caspar, C.; Gladisch, A.; Foisel, H.-M.; Strebel, B.

Faulkner, D.W.:
European Conference on Networks and Optical Communications, NOC 1997. Proceedings. Vol.2: Core and ATM networks : Antwerpen, June 17 - 20, 1997
Amsterdam: IOS Press, 1997
ISBN: 90-5199-340-4
ISBN: 4-274-90165-3
ISBN: 3-905084-21-X
ISBN: 90-5199-342-0
European Conference on Networks and Optical Communications (NOC) <1997, Antwerpen>
Conference Paper
Fraunhofer HHI ()
demultiplexing equipment; diffraction gratings; multiplexing equipment; network topology; optical crosstalk; optical transmitters; wavelength division multiplexing; crosstalk evaluations; optical add/drop multiplexer; wdm; ring networks; recirculating loop experiment; nrz formatted signals; arrayed-waveguide grating; demultiplexer; fibre bragg grating; transmitter; gain variations; gain detuning; 10 Gbit/s; 17 to 37 degc

The influences of power and wavelength (frequency) uncertainties as well as crosstalk were investigated by means of a recirculating loop experiment with 10 Gbit/s NRZ formatted signals. Two general kinds of optical add/drop multiplexer (OADM) were evaluated experimentally by introducing into the loop an arrayed-waveguide grating (de)multiplexer (AWGM) or fibre Bragg grating OADM. The measurement of cascading effects due to OADM based on the arrayed-waveguide grating show an acceptable frequency uncertainty of +or-3.5 GHz for both transmitter and AWGM, respectively. The measurement of the relation between OADM crosstalk and gain variations show a tolerable gain detuning of approximately +or-3 dB and at least the measurement of relation between crosstalk and detuning of an OADM based on the fibre Bragg grating give a range of stable operation within +or-20 GHz or 17 degrees C to 37 degrees C, respectively.