Accession Number : ADP007024

Title :   An Optically Preamplified 1 Gbit/s/Channel Multichannel Grating Demultiplexer Receiver,

Corporate Author : STC TECHNOLOGY LTD HARLOW (UNITED KINGDOM)

Personal Author(s) : King, J. P. ; Kanabar, Y. ; Baker, N. ; Brannan, J.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : The Multichannel Grating Demultiplexer (MGD)1 receiver is an attractive component for High Density Wavelength Division Multiplexing (HDWDM) systems. It combines a diffraction grating with an array receiver to provide multiple channel access. However, demultiplexer losses and the need for array operation may lead to insufficient receiver sensitivity for some applications. To improve sensitivity a semiconductor laser amplifier (SCLA) has been included before the MGD. The wide gain spectrum allows a single SCLA to preamplify many parallel HDWDM channels', while peak optical input, and consequently intensity modulation (IM) crosstalk, is minimised 3. The MGD also provides a -2.6 nm optical filter for the spontaneous emission, reducing its noise contribution at the receiver.

Descriptors :   *PREAMPLIFIERS, *OPTICAL EQUIPMENT, ACCESS, ARRAYS, CHANNELS, CROSSTALK, DENSITY, DIVISION, EMISSION, FILTERS, GAIN, HIGH DENSITY, INPUT, INTENSITY, LASERS, LOSSES, MULTICHANNEL, NOISE, OPERATION, OPTICAL FILTERS, RECEIVERS, SEMICONDUCTOR LASERS, SENSITIVITY.

Subject Categories : Electrical and Electronic Equipment
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE