Described are a process for producing elastane yarn having a linear density of at least 2500 dtex by the wet spinning process and the thereby producible coarse linear density elastane yarn having a wide cross section and a low residual solvent content. The apparatus may include a prism assembly configured to receive collimated light and splits the light into different directions according to its polarization state. A Si1-xGex layer is also disposed between the electrically insulating layer and the unstrained silicon active layer. Also encompassed by the present invention are kits and devices adapted to carry out the method of the present invention. Such an object may be somewhat analogous to a spring in that a minimum margin between the two other objects may be defined to allow the two other objects to approach one another until the minimum margin is reached, and a flexible margin may allow movement of the two other objects within the flexible margin relative to each other, optionally up to a maximum distance of separation. A transceiver 302 may maintain a radio link with a network base station 104.