Optical transceiver

Abstract

Abstract In optical transmitting and receiving arrangements for coupling light into and out of an optical fibre, it is desired to achieve high launch efficiencies in conjunction with high crosstalk attenuations. An optical transmitting and receiving arrangement is specified in which the end face of the optical fibre is obliquely ground and the longitudinal axis of the optical fibre is inclined to the optical axis of the system. Light from an optotransmitter S is directed via a beam splitter ST to the end face of an optical fibre which is mounted in a plug Ste. Located between the transmitter S and beam splitter ST is a lens L1, and between the beam splitter ST and the end face of the optical fibre a lens L3, which serve to image the transmitted light onto the end face of the optical fibre. If the system of the lens L1 and transmitter S has a high return loss, it is sensible for the arrangement according to the invention having the obliquely ground optical fibre to prevent reflected light at the end face of the optical fibre from falling into the receiver S. An aperture stop BL can be arranged between the lens L3 and the optical fibre. The light reflected at the end face of the optical fibre falls not onto the aperture opening but onto the aperture stop, which thus prevents the reflected light from falling onto the receiver E. A plug holder SH is provided for mounting the plug Ste on the optical fibre. The grinding angle of the fibre is 8 DEG , for example. <IMAGE>

Inventors

• 👤 Werner Dipl.-Ing. Bohnert
• 👤 Albrecht Dr. Rer. Nat. Kuke
• 👤 Udo Dipl.-Ing. Ludäscher (FH)
• 👤 Willi Dipl.-Phys. Wolf

Bibliographic Details