Optical fiber having an expanded light pattern

An illumination system, comprising:

• a light source having an array of laser diodes configured to emit a combined light beam;
• a despeckling mechanism to reduce speckling in the light beam;
• an optical fiber receiving and transmitting the light beam, the optical fiber including a proximal portion configured to receive the light beam from the light source, the proximal portion having a first numerical aperture, the optical fiber including a distal portion configured to emit the light beam to illuminate a surgical field, the distal portion having a second numerical aperture, and the optical fiber including a central portion extending between the proximal portion and the distal portion, the central portion having a third numerical aperture, wherein the optical fiber is configured to receive the light beam at the proximal portion at the first numerical aperture and output the light beam from the distal portion at the second numerical aperture, and
• a micro chandelier, the micro chandelier including a needle and a cannula hub, the cannula hub being positioned at a back side of the micro chandelier, the needle being positioned opposite the cannula hub,
• wherein the optical fiber is attached inside and traverses through the micro chandelier, the optical fiber extending through the cannula hub and the needle, the optical fiber being movably attached to the cannula hub such that a tip of the distal portion of the optical fiber moves in and out of the needle,
• wherein the optical fiber includes a fiber stop, the fiber stop being positioned inside the micro chandelier and between the cannula hub and the needle of the micro chandelier, and the fiber stop being configured to move between the cannula hub and the needle, and
• wherein the cannula hub has a first plug facing the needle and the needle has a second plug facing the cannula hub, the fiber stop being configured to fit into the first plug thereby fixing the optical fiber on the micro chandelier with the tip of the optical fiber being recessed inside the needle, and the fiber stop being further configured to fit into the second plug thereby fixing the optical fiber on the micro chandelier with the tip of the optical fiber being extended out of the needle.