A method for reducing the channel spacing in a coherent optical heterodyne system
- 1 July 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 2 (7) , 513-515
- https://doi.org/10.1109/68.56642
Abstract
A method of channel allocation for the reduction of the channel spacings in a heterodyne optical transmission system is proposed and analyzed for the specific case of frequency shift keying (FSK). This technique makes it possible to reduce the average optical interchannel spacing by an amount approximately equal to the intermediate frequency. This can increase the number of channels that can be accommodated within the generally limited continuous tuning range of commercial lasers employed as local oscillators by as much as 100% without the need for auxiliary equipment.Keywords
This publication has 6 references indexed in Scilit:
- Optical heterodyne receiver providing random channel selectionElectronics Letters, 1989
- Densely spaced fdm optical coherent system with near quantum-limited sensitivity and computer-controlled random access channel selectionElectronics Letters, 1989
- Field demonstration of a 565-Mbit/s DPSK coherent optical system over 176 km of installed fiberPublished by Optica Publishing Group ,1989
- Channel allocation and crosstalk penalty in coherent optical frequency division multiplexing systemsElectronics Letters, 1988
- Sensitivity penalty in multichannel coherent optical communicationsJournal of Lightwave Technology, 1988
- Single frequency and tunable laser diodesJournal of Lightwave Technology, 1988