Comcore unveils WDMs

April 8, 2004 Shanghai, China -- Fused fiber products supplier Comcore Optical Technologies Inc. has announced general availability of its newly developed 980-/1550-nm WDMs. Mainly used in erbium-doped fiber amplifiers (EDFAs), the 980-/1550-nm WDM can combine the optical signal at 1550 nm and pump power at 980 nm into one common output, which is then spliced to the erbium-doped fiber for power amplification.

April 8, 2004 Shanghai, China -- Fused fiber products supplier Comcore Optical Technologies Inc. has announced general availability of its newly developed 980-/1550-nm WDMs. Mainly used in erbium-doped fiber amplifiers (EDFAs), the 980-/1550-nm WDM can combine the optical signal at 1550 nm and pump power at 980 nm into one common output, which is then spliced to the erbium-doped fiber for power amplification.

Conventionally, the 980-/1550-nm WDMs can only be made with the same type of fiber, such as Corning HI1060 Flex, OFS 980 Coupler, or an equivalent fiber. Due to the mismatch in Mode Field Diameter (MFD) between the 980-nm fiber and SMF-28 fiber, a specially programmed fusion splicer has to be used when a WDM is spliced to the signal fiber (typically Corning SMF-28 Fiber). Large splicing loss is usually expected.

Designed to simplify the splicing process and reduce the splicing loss between signal fibers to the WDM, the newly developed WDM is fabricated with two dissimilar fibers: standard Corning SMF-28 fiber for signal (1550-nm) input port and Corning HI1060 Flex or OFS 980 Coupler fiber for pump (980-nm) input and common output port.

Consequently, the new WDM offers many advantages over the conventional design, including 1) reducing typical 0.15-dB of above-mentioned splicing loss, which is very critical to EDFA performance; 2) improving the overall EDFA performance especially in optical noise figure; and 3) lowering the assembly cost through assembly time reduction and easing the requirements for manufacturing equipment (since it does not require a specially programmed fusion splicer to splice standard SMF-28 fiber).

Like Comcore's other fused fiber products, the new WDM is manufactured using Comcore's proprietary superfusion fusion and packaging processes, which guarantee the component's high reliability and full compliance with Telcordia GR-1221 standard, say company representatives.

More in DWDM & ROADM