An optoelectronic arrangement includes at least one laser component. A heating device for heating the laser component up to a constant temperature is provided in such a way that the laser component is operated at a temperature that is at least equal to the highest temperature to be expected that would be present during operation of the laser component without the heating device. A method for operating a laser component includes heating the laser component to a constant temperature that is at lea...

Spray-dried fabric washing detergent powders based on nonionic surfactants are prepared by a process involving the step of injecting a phosphoric acid ester into the high pressure line carrying slurry to the spray-drying tower. The phosphoric acid ester is dissolved or dispersed in a nonionic surfactant such as a long chain alcohol ethoxylate and injected into the pressurized slurry either using a venturi effect or by being pressurized to a higher pressure.

A semiconductor laser beam device, comprising a stem type package having a base part and a heat sink part, wherein the heat sink part is cylindrically formed so as to be concentric to the base part, a groove is formed along the axial direction of the heat sink part, and a semiconductor laser beam element is disposed at the bottom part of the inner wall surfaces of the groove whereby the radiating capability of the semiconductor laser beam device can be increased by increasing the volume of the h...

A microprocessor is used to control the temperature of a laser emitter and thereby regulate the wavelength of optical signals from the laser. A serial interface in the microprocessor provides input and output lines to a host device, and temperature lookup tables are stored in nonvolatile memory. Control logic processes information stored in the memory as well as information on operating conditions of the laser emitter to precisely control the temperature of the laser emitter. A thermo-electric c...

Platinum (Pt) thin film heaters are deposited by a focused ion beam for semiconductor manufacturing of thermally tunable distributed feedback lasers. An exemplar 1.3 .mu.m InGaAsP/InP laser is integrated with a tuning element having a wide wavelength tuning range of 4.9 nm, that is, 857 GHz, with a small heater current of 13.0 mA.

An apparatus is described in which the temperature of a semiconductor laser (or other device) can be set to a desired value by using the heat generated by the laser itself in conjunction with an adjustable thermal impedance heat sink to effect the desired temperature rise.

A laser amplification system includes a pumping diode laser, a gain laser crystal, a moveable wedged shaped etalon for wavelength selection, a non-linear crystal for wavelength conversion, such that each optical component has independent temperature control means. A single mode operation is achieved of up to 100 Watts output power with a minimum noise by stabilizing the optimum temperature of the optical media and the optical pathlength of the etalon. All components are disposed on a single meta...

A vertical-cavity surface-emitting laser diode (VCSEL) device, including a laser element portion formed on a substrate, the laser element portion comprising a multi-layer reflective mirror of a first conductivity type, an active layer, and a multi-layer reflective mirror of a second conductivity type, and a light absorbing heat converting region at a position thermally connected to the laser element portion on the substrate, the light absorbing heat converting region absorbing light and generati...

A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the lase...

An extremely versatile diode laser assembly is provided, the assembly comprised of a plurality of diode laser subassemblies mounted to a stepped cooling block. The stepped cooling block allows the fabrication of a close packed and compact assembly in which individual diode laser subassembly output beams do not interfere with one another.