Patent ID: 7796893

Claim:
An optical bi-directional transceiver module including an optical transmitter, an optical receiver, and an optical filter in a single housing, in which: the optical filter, when an A-band wavelength light signal and a B-band wavelength light signal enter the optical filter contained in the housing, passes the A-band wavelength light signal, and transmits the A-band wavelength light signal to the optical transmitter; the A-band wavelength light signal generated from the optical transmitter returns to an incident path via the optical filter; and the B-band wavelength light signal is reflected in a direction different from the incident path, and is applied to the optical receiver, such that an angle between a vertical axis of the optical filter and the incident light signal is more than 0°, and less than or equal to 20°; the housing further includes a reflection mirror, in which the reflection mirror is arranged at a specific location, at which the B-band wavelength light signal reflected from the optical filter is reflected in a direction perpendicular to the incident path of the light signal incident on the optical filter; and the optical transmitter and the optical receiver are arranged to be perpendicular to each other, in which a distance between the optical receiver and a reflection surface of the reflection mirror is shorter than the shortest distance between the optical receiver and the incident path of the light signal incident on the optical filter, such that the B-band wavelength light signal reflected from the reflection surface does not disturb the light signal incident on the optical filter.