Abstract: The invention relates to an optical device comprising an emitting source and a partly-reflective element which is adapted for receiving an emitted light beam. This element is tilted in a small angle with respect to the emitted light beam. A portion of the emitted light beam is reflected by the partly-reflective element towards a transmittive element which is arranged in close proximity to the emitting source and adapted to receive and transmit the reflect portion. The transmittive element is arranged for at least partly fixing or positioning an optical fiber, which is emitting the input light beam, and provided for transmitting the laterally offset reflected portion of the input light beam away from the input fiber.

Abstract: The invention relates to an optical device comprising an emitting source and a partly-reflective element which is adapted for receiving an emitted light beam. This element is tilted in a small angle with respect to the emitted light beam. A portion of the emitted light beam is reflected by the partly-reflective element towards a transmittive element which is arranged in close proximity to the emitting source and adapted to receive and transmit the reflect portion. The transmittive element is arranged for at least partly fixing or positioning an optical fiber, which is emitting the input light beam, and provided for transmitting the laterally offset reflected portion of the input light beam away from the input fiber.

Abstract: A system for determining an optical loss of a device under test DUT includes a fiber coupler for receiving an optical input power (Ps) at a first input, coupling out a stimulus signal at a first output derived from the optical input power (Ps), receiving a response signal on the applied stimulus signal, and for providing a returning optical power (P) at a third output derived from the received response signal. For calibration, a reference cable with a reflectivity Rref is coupled to the first output of the fiber coupler and a value Pref of the returning optical power is measured. The reference cable is exchanged for a customer cable, whereby an end of the customer cable is provided in a way that no, or substantially no, reflection occurs, and a value Ppara of the returning optical power is measured. The calibration uses the values Rref, Pref, and Ppara.

Abstract: A variable optical attenuator includes incoming and outgoing surfaces which are inclined relative to each other so that light reflected at an attenuating coating on one or both surfaces is reflected away from the optical path to avoid interference effects. The attenuating coating varies in density depending upon the angle of rotation of the attenuator. Variable attenuation may be achieved by rotating the attenuator a predetermined amount under microprocessor control.

Abstract: A fiber optic focusing device allows fine adjustment of the focal point along the optical axis without causing tilting of the focusing lens system. Roughly perpendicular setscrews engaging opposing inclined surface urge the lens system along the optical axis.