With two FC/APC connectors in 3mm cable. Made by Lucent(Lycom was merged into Lucent). DK-SM is dispersion-compensating-fiber, MFD is 5.0um, as shown in 6th photo below. The 2nd pdf link below assumes Lucent DK-SM fiber has a normal dispersion of -102 ps/(nm* km) at 1550nm, so 30km DCF would have -3000 ps/nm dispersion, which would compensate >180km conventional SMF dispersion. Due to small core and high refractive index, it shows strong nonlinear effect. Another application is as an active Raman medium or other nonlinear applications. The last pdf link below shows that “As an active Raman medium, a 1.2 km length of low-loss single-mode fibre with moderate GeO, content (18 mole %, LYCOM, DK-SM) is used. The presence of GeO, in the core results in a relatively high value of An of 0.025, making it possible to reduce the core diameter to less than 3 pm so that high pump power densities become feasible.”. The htm link below describes how to fusion-splice with standard SM fiber. Since we do not have fiber rewinding machine, we cannot sell fiber partially. We have tested fiber loss, attenuation, and fiber length at our lab, see our test results at the 5th photo and last photo below.