Transceiver for bidirectional signal transmission over a monomodal optical fiber

An optical transceiver for receiving and transmitting information optically over a single optical communication fiber, comprising:

• a housing;
• a light transmitter disposed in said housing for emitting a first wavelength of light for transmission over the optical communication fiber;
• a light receiver disposed in said housing for receiving a second wavelength of light from the single optical communication fiber;
• and
• an optical system disposed in said housing for directing the first wavelength of light from said light transmitter to the single optical communication fiber and for directing the second wavelength of light from the single optical communication fiber to said light receiver, said optical system including,
• a first lens,
• a second lens,
• a planar filter disposed between said first and second lenses,
• said first and second lenses each having a first face confronting said planar filter and a second face for communicating optical information;
• said light transmitter being positioned in front of the second face of said first lens;
• wherein a terminal part of the single optical communication fiber is connected to said optical system and an optical fiber stub connects said optical system to said light receiver, such that said light transmitter, said light receiver, and said optical system are connected via the single optical communication fiber within said housing;
• said optical fiber stud and the single optical communication fiber being mounted on a support in juxtaposition with the second face of said second lens, thereby constraining the positions of said light transmitter, said light receiver, and said optical system with respect to each other, within said housing.