An Optically Preamplified 1 Gbit/s/Channel Multichannel Grating Demultiplexer Receiver,
STC TECHNOLOGY LTD HARLOW (UNITED KINGDOM)
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The Multichannel Grating Demultiplexer MGD1 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.
- Electrical and Electronic Equipment
- Fiber Optics and Integrated Optics