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Micro-Optic Wavelength Division Multiplexer (MWDM) is based on thin-film filter technology and patented athermal platform systems for optical devices. This device has a very flat and wide passband, low insertion loss, and high isolation which makes it ideal for combining pump (1480nm) and signal (1550nm) light in Optical Fiber Amplification Systems. The MWDM is used in high-power applications in DWDM systems. MWDM devices are Bellcore GR-1221 qualification tested and are in compliance with industry green initiatives such as Rohs and WEEE. All products are epoxy-free in the optical path.