Abstract: An assembly for focusing and coupling radiation produced by a semiconductor laser into an optical fiber, in particular a multimode optical fiber, including a radiation-focusing element in the form of cylinder lens disposed in the area between the radiating surface of the semiconductor laser and light entrance side of the optical fiber, the length of the cylinder lens being at least equal to a width of a beam exit window defining the radiation surface of the semiconductor laser, and the diameter of the cylinder lens being substantially on the order of magnitude of the core diameter of the optical fiber. The cylinder lens is in the form of glass fiber lens directly glued onto, fused with, or melted onto the light entrance side of the optical fiber which extends substantially at right angles to the orientation of the cylinder lens.

Abstract: An assembly for focusing and coupling radiation produced by a semiconductor laser into an optical fiber, in particular a multimode optical fiber, including a radiation-focusing element in the form of cylinder lens disposed in the area between the radiating surface of the semiconductor laser and light entrance side of the optical fiber, the length of the cylinder lens being at least equal to a width of a beam exit window defining the radiation surface of the semiconductor laser, and the diameter of the cylinder lens being substantially on the order of magnitude of the core diameter of the optical fiber. The cylinder lens is in the form of glass fiber lens directly glued onto, fused with, or melted onto the light entrance side of the optical fiber which extends substantially at right angles to the orientation of the cylinder lens.

Abstract: A method for bonding a component (14) to a substrate (18) via a thermally hardened or softened bonding medium, employs PTC or NTC thermistor (24) for heating the bonding medium during bonding of the component. In one disclosed example, the method is used for bonding an optical fiber to a substrate, via a solder layer (40), in alignment with a semiconductor laser (12) in a diode-laser module (10).

Abstract: To produce blue light by means of a laser, pumped light is coupled into a birefringent, nonlinear crystal (5) in a variable frequency laser (1) from a laser diode pumped light source (7, 8, 9) via an input mirror (3). Due to adjustment of the inclination of the crystal (5) or with the aid of tempering means (6) for the crystal, most of the pumped light is absorbed in the crystal (5)--upon suitable polarization of the pumped light--while the rest is available for a frequency mixture of the fundamental Wave of the laser and of the pumped light. Via an output mirror (4) blue laser light with a Wavelength of e.g. 459 nm is coupled out, with a fundamental wave of e.g. 1064 nm and pumped light with a wavelength of e.g. 806 nm.