In the volume production of any device, the in-lot and lot-to-lot consistency of major components is of paramount importance.

The fundamental manufacturing process of IsoGain has been designed to generate an inherently consistent core composition - ensuring that your EDFAs deliver the same, flat spectral response and that one design of GFF 'fits all'

These graphs1 show absorption and emission spectra measured at eight points along a full production batch of IsoGain™. As you can see, the curves are congruent - in fact, the maximum variation is less than 0.05 dB.

To simplify your EDFA production still further, Fibercore Limited can deliver your fiber within a lot-to-lot pump absorption variation of +/- 0.25 dB - minimising changes in optimum gain section length.

Note:
1. Absorption and emission spectra have been normalised to 5.5 dB/m and 5.0 dB/m, respectively to emphasise the congruence of the spectral shape.
2. The maximum variation in pump absorption allowed within the standard specification of IsoGain™ is +/- 0.5 dB - tighter specifications are achieved by selection.