The SR100 series products detect light within the fiber based on evanescent light. The fiber is continuous, without tap. Hence there is no reflection and low loss. Thanks to the positioning of the photodiode the product has strong directivity (i.e. light is detected in one direction and not the other, loss is minimal in both direction).
The product is available in a wide range of responsivity. It can be configured with or without 900um buffer around the fiber. And it comes in SMF, PMF and even 980nm PMF.
Pure Photonics typically has a selection in inventory for quick shipment.
