Thorlabs offers multimode fiber bundles in straight, bifurcated (Y-cable), or fan-out configurations and round or linear bundle end configurations. Our stock fiber optic bundles are terminated with SMA905 connectors and are offered with high OH fiber, low OH fiber, and our mid-IR fluoride optical fiber (for 285 nm - 4.5 µm). Our bifurcated optogenetics cable feature SMA905 or FC/PC connectors and two ferrules. We also offer bifurcated reflection probes that are available with either SMA905-terminated or Ø1/4" probe sample legs, which can optionally include a source reference leg. Also available is a transmission dip probe with a Ø1/4" probe sample leg and different length probe tips. Custom configurations are also available (see the full product presentations for details).