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Photonics Spectra
Mar 2001

oBragg Fiber Bragg gratings with channel spacing down to 25 GHz are available from Southampton Photonics. The BragNet gratings incorporate a technology that enables an increase in the number of wavelengths of light that can be sent down a single fiber optic cable, thereby expanding network capacity. They also are available in 50-, 100- and 200-GHz channel spacing and with 0.1, 0.2 and 0.4-nm bandwidths. They feature
<-30-dB adjacent channel isolation, <-35-dB nonadjacent channel isolation, >25-dB blocking over channels, reflectivity of >30 dB, wavelength accuracy of ±500 MHz and thermal stability of 50 MHz/°C. These gratings automate the design process, enabling rapid, high-volume production.

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