OPTICAL DUPLEXER APPARATUS FOR SIMULTANEOUSLY TRANSMITTING AND RECEIVING LASER BEAMS

摘要

Optical duplexer apparatus for simultaneously transmitting and receiving laser beams, which apparatus is used to simplify the problems of alignment between distant optical transceivers and comprises: a retro-reflector tube (5); a polarizing prism (13) for: dividing the transmitted laser beam (2SP) into two beams (2P,2S) which are linearly polarized in perpendicular planes, directing only the reflected component (2S) to the retro-reflector (5); dividing the received laser beam (2'SP) from the retro-reflector (5) into two beams (2'P, 2'S) which are linearly polarized in perpendicular planes, directing only the refracted component (2'P) to the receiver (52); a diverging lens (14) which is situated between the polarizing prism (13) and the retro-reflector (5) and is responsible for: receiving the reflected component (2S) of the transmitted laser beam (2SP) from the polarizing prism (13) and adapting said component to the focal plane of the retro-reflector (5); receiving and collimating the received laser beam (2'SP) from the retro-reflector (5) and directing said beam to the polarizing prism (13).