VIAVI SmartPocket Optical Light Sources (OLS-34, OLS-35, OLS-36, OLS-37 and OLS-38) offer up to four wavelengths laser diode stabilized light source with an excellent price/performance ratio. The OLS-3x are the ideal complementary tools to the OLP-3x to measure the insertion loss and test the continuity in multimode datacom and local area networks as well as in singlemode telecommunication, FTTH/PON and CATV-multimedia networks.