Patent ID: 8873902
Filing Date: 2014-10-28
Classification: G02B

Abstract:
1. An optical transmission module, comprising: a printed circuit board (PCB) comprising a first surface and a second surface opposite to the first surface, the PCB defining a first through hole and a second through hole, both of the first and second through holes extending through the first surface and the second surface; a ceramic substrate mounted on the first surface of the PCB; a light emitting diode and a photodiode carried on the ceramic substrate, the light emitting diode comprising a light emitting surface aligned with the first through hole, the photodiode comprising a light receiving surface aligned with the second through hole; an optical printed circuit board (OPCB) mounted on the second surface of the PCB, the OPCB comprising a flexible substrate, a first planar optical wave guide and a second planar optical wave guide mounted on the flexible substrate; a first reflective unit mounted on the flexible substrate and aligned with the first through hole, wherein the light emitting diode is configured for emitting a first optical signal, the first optical signal passes through the first through hole and is reflected by the first reflective unit, and then is coupled into the first planar optical wave guide; and a second reflective unit mounted on the flexible substrate and aligned with the second through hole, wherein the second planar optical wave guide is configured for transmitting a second optical signal, the second optical signal is reflected by the second reflective unit and passes through the second through hole, then is received by the photodiode.