We model optical parametric oscillation in ring cavities with two-photon absorption, focusing on silicon at 1.55 μm. Oscillation is possible if free-carrier absorption can be mitigated; this can be ...

Photoshop CS6 Extended tutorial showing how to make interlocking, 3D gold rings from scratch. If 3D isn't working: Only available in EXTENDED versions. Windows XP doesn't support 3D. Video card ...