Patent ID: 6804436
Filing Date: 2004-10-12
Classification: G02B

Abstract:
An optical transmitter unit, comprising a laser diode for emitting optical radiation, an optical fibre stub having a fibre core for carrying said optical radiation and being surrounded by a cladding, said optical fibre stub being disposed in a ferrule, and focussing optics for focussing said optical radiation from the laser diode into an entrance face of the fibre stud, the focussing optics being arranged to focus the optical radiation along a focus axis to a focus spot on the entrance face of the fibre stub, said entrance face being at a particular orientation with respect to said focus axis; and said ferrule being rotatable in a manner for altering said particular orientation of said entrance face with respect to said focus axis, thereby affecting the efficiency of coupling said optical radiation into said fibre core and cladding.