Bidirectional optical transceiver module and method of aligning the same

A method of aligning a bidirectional optical transceiver module, the method is performed by the bidirectional optical transceiver module comprising:

• a package having on one side a cavity that is inwardly recessed and on the other side a platform mounting groove, wherein a receiver mounting groove is formed on the bottom surface of the cavity, and a plurality of lead wires pass through the package;
• a platform mounted on the package and having an alignment mark to align a transmitter;
• the transmitter mounted on one side of the platform and configured to generate output light according to an electric signal transmitted through at least one of the plurality of lead wires;
• a holder which includes the horizontal portion having a through-hole and disposed on the package to cover the cavity, and the vertical portion which has the inclined surface on one side and a connection hole connected to the through-hole, and which protrudes on the top of the horizontal portion;
• a receiver which is mounted in the cavity, generates an electric signal that corresponds to input light that passes through the through-hole and the connection hole to be incident into the cavity, and outputs the generated electric signal through at least one of the plurality of lead wires;
• and a WDM filter disposed on the inclined surface of the vertical portion and configured to deliver the output light toward the optical fiber and deliver the input light toward the connection hole and the through-hole,
• wherein the method comprising:
• mounting the receiver in the receiver mounting groove of the package;
• mounting the transmitter in the platform according to the alignment mark formed on the platform;
• mounting the platform in the platform mounting groove of the package;
• and
• fixing the WDM filter by aligning the holder using a monitor of an optical microscope that is positioned on the same line as an optical axis of the receiver so as to overlap active areas of the transmitter and the receiver.