The PGT 20130 is a laser module with a 1510-nm laser source in a butterfly package and is available as a cooled or uncooled unit. The laser is intended as a source for an optical supervisory channel for systems with inline amplifiers as proposed by ITU-T in G.691 and G.692. By providing a laser source for the optical supervisory channel outside the usable gain bandwidth of the EDFA, the 1510-nm laser source provides an optical supervisory channel that is futureproof when the number of channels in WDM systems are increased from eight to 16 channels and more.
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