Abstract: Sensors incorporated within a waveguide detect a laser light output from at least a laser delivery optical fiber to provide in situ feedback of the laser light intensity detected by the sensor. The sensors may detect laser light directly from the laser delivery optical fiber or as reflected back from a plurality of work pieces during a weld cycle. In various aspects, the feedback provided from the sensors is used to control the laser light intensity or to alert an operator that the laser light intensity is below a predetermined parameter.

Abstract: Techniques are provided for providing assistance to users in locating and accessing points of interest associated with particular time positions in the media items using the techniques described herein. For instance, an electronic device outputting a media item may select one or more metadata items based on a current output position in the media item. The electronic device may then generate and output a user interface including a progress bar that includes indicators representing the selected metadata items and output the user interface to a display of the electronic device.