Abstract: An improved and simplified connector scheme is disclosed for coupling the light output of a light emitting diode mounted in a flexible circuit to an optical fiber. The LED is mounted in flexible circuitry by a technique known as "poke in" which comprises forming a substantially H-shaped slot in a conductor portion of a circuit and the underlying flexible substrate on which the circuit is formed and inserting an LED into the slot in edgewise fashion. The optical fiber is placed in abutting position against one side edge of the LED and a suitable potting agent is applied thereto to make an integral unit. Preferably the potting agent also includes an outer layer of light reflecting material to prevent unwarranted loss of light from the remaining sides of the LED.