Patent ID: 6188495
Filing Date: 2001-02-13
Classification: G02B,H04B

Abstract:
An optical transmission-reception apparatus comprising:an optical transmission medium connection block to which an optical transmission medium is connected for transmitting to a second end face a first optical signal inputted from a first end face;a light-emitting element for emitting said first optical signal which is in a linearly polarized state;a beam splitting film provided on an optical path starting at said light-emitting element and reaching said first end face of said optical transmission medium, so as to split a second optical signal emitted from the first end face of said optical transmission medium, a first polarization component of said second optical signal passing through said film, a second polarization component of said second optical signal being reflected by said film, approximately 100% of said first optical signal continuing on said optical path toward said first end face of said optical transmission medium after said beam splitter; anda light-receiving element for receiving at least one of said first and second polarization components of said second optical signal via said beam splitting film.