A fiber optic sub-assembly, comprising: a printed circuit board having opposed first and second surfaces (44, 46), wherein one of the first and second surfaces (44, 46) is an upper surface of the printed circuit board and the other of the first and second surfaces (44, 46) is a lower surface of the printed circuit board, wherein the printed circuit board includes an opening on the second surface and a recess in the first surface; and a total internal reflection sub-assembly supported by the printed circuit board and defining an optical path, the total internal reflection sub-assembly comprising: an active device electrically coupled to the printed circuit board, the active device being configured to emit light normal to the first or second surface of the printed circuit board or to collect light directed toward the active device; a carrier supporting the active device; a body comprising: a lens supported by the body and spaced apart from the active device and positioned in the optical path, the lens being configured to collect the light emitted by or concentrate the light directed to the active device; and an optical turning member supported by the body and configured to change the direction of the optical path, wherein at least a portion of the optical path between the active device and lens is located between the first and second surfaces (44, 46) of the printed circuit board, wherein the carrier is coupled to the body; wherein the body is coupled to the side of the printed circuit board that includes the first surface; wherein the printed circuit board being shaped to receive the carrier proximate the second surface; wherein the recess in the first surface shaped to receive the body of the total internal reflection sub-assembly; wherein the opening on the second surface is shaped to receive the carrier of the total internal reflection sub-assembly; wherein the printed circuit board and the lens are shaped so that a space is maintained between the lens supported by the body and the active device on the carrier. a printed circuit board having opposed first and second surfaces (44, 46), wherein one of the first and second surfaces (44, 46) is an upper surface of the printed circuit board and the other of the first and second surfaces (44, 46) is a lower surface of the printed circuit board, wherein the printed circuit board includes an opening on the second surface and a recess in the first surface; and a total internal reflection sub-assembly supported by the printed circuit board and defining an optical path, the total internal reflection sub-assembly comprising: an active device electrically coupled to the printed circuit board, the active device being configured to emit light normal to the first or second surface of the printed circuit board or to collect light directed toward the active device; a carrier supporting the active device; an active device electrically coupled to the printed circuit board, the active device being configured to emit light normal to the first or second surface of the printed circuit board or to collect light directed toward the active device; a carrier supporting the active device; a body comprising: a lens supported by the body and spaced apart from the active device and positioned in the optical path, the lens being configured to collect the light emitted by or concentrate the light directed to the active device; and an optical turning member supported by the body and configured to change the direction of the optical path, wherein at least a portion of the optical path between the active device and lens is located between the first and second surfaces (44, 46) of the printed circuit board, wherein the carrier is coupled to the body; a lens supported by the body and spaced apart from the active device and positioned in the optical path, the lens being configured to collect the light emitted by or concentrate the light directed to the active device; and an optical turning member supported by the body and configured to change the direction of the optical path, wherein at least a portion of the optical path between the active device and lens is located between the first and second surfaces (44, 46) of the printed circuit board, wherein the carrier is coupled to the body; wherein the body is coupled to the side of the printed circuit board that includes the first surface; wherein the printed circuit board being shaped to receive the carrier proximate the second surface; wherein the recess in the first surface shaped to receive the body of the total internal reflection sub-assembly; wherein the opening on the second surface is shaped to receive the carrier of the total internal reflection sub-assembly; wherein the printed circuit board and the lens are shaped so that a space is maintained between the lens supported by the body and the active device on the carrier.