Determining pointing accuracy using optical fiber bundle

A method for determining a pointing accuracy for an optical beam, the method comprising:

• receiving, at an optical fiber bundle that includes a central fiber and a plurality of surrounding fibers, an optical beam;
• generating, at each photodetector of a plurality of photodetectors configured to receive beam portions from the plurality of surrounding fibers in the optical fiber bundle, a current or voltage based on the received optical beam;
• determining, by one or more processors in communication with the plurality of photodetectors, an angle of incidence of the received optical beam relative to the central fiber based on the generated currents or voltages;
• and
• adjusting, by the one or more processors, a pointing direction or focus length of the received optical beam using a focusing system based on the determined angle of incidence.

A tangible, non-transitory computer-readable storage medium configured to store instructions, the instructions, when executed by one or more processors, cause the one or more processors to perform a method, the method comprising:

• receiving a current or voltage from each photodetector of a plurality of photodetectors configured to receive portions of an optical beam from a plurality of fibers in an optical fiber bundle, the plurality of fibers surrounding a central fiber of the optical fiber bundle;
• determining an angle of incidence of the optical beam relative to the central fiber based on the received currents or voltages;
• and
• adjusting a pointing direction or focus length of the optical beam using a focusing system based on the determined angle of incidence.