A laser diode pump includes a plurality of laser diodes each capable of generating a lasing wavelength. The laser diode pump further includes at least one wavelength combiner operable to combine the plurality of lasing wavelengths generated by the plurality of laser diodes into a multiple wavelength pump signal. In one particular embodiment, at least two of the plurality of lasing wavelengths generated by the plurality of laser diodes comprise a wavelength between 1270 nm and 1350 nm.

Analog control of a plurality of light sources, such as light-emitting diodes (LEDs), to generate multiple colors of light. An electronic circuit controls three or more analog outputs in response to a single analog input, each of the analog outputs controlling a different one of the light sources.

Therapeutic sources for use in the practice of brachytherapy comprise a radioactive composite that includes (a) a polymeric matrix and (b) a radioactive powder, e.g. Pd-103 or I-125, consisting essentially of very fine radioactive particles that are randomly and essentially uniformly dispersed within the polymeric matrix. The composite may be in the shape of one or more solid cylindrical rods surrounded by a non-radioactive sleeve. Alternatively it may be a hollow rod, suture, film, sheet, or mi...

A vacuum arc source of ions of metals utilizing the principle of forming anode spots, whose anode surface (8) is fed with liquid metal (7) originating from a reservoir (6) through a connection member (9). The connection member is preferably constituted by a material chosen so that it has with respect to the liquid metal a great difference in the temperatures required to obtain the same vapor tension. The mode of feeding through the connection member is in embodiments of the invention obtained by...

A device is used to wavelength lock two optical signals to some frequency offset. A photomixer section produces a frequency test signal from the beat component of the two optical signals. The frequency of the frequency test signal reflects whether the actual frequency offset of the two optical signals equals the desired offset. A frequency filter with a monotonically varying transfer function is used to filter the frequency test signal. Thus, different gains are applied to different frequencies....

A method for modulating a liquid metal ion source includes generating an ion beam, directing a light beam at the liquid metal ion source and inducing a modulation in the ion beam by modulating the light beam. An apparatus for carrying out the invention includes a light beam source for generating a light beam, a modulator for modulating the light beam and a mechanism for directing the modulated light beam at the light metal ion source.

A method for determining sources of interference that cause partial discharges in an encapsulated conductor structure of a magnetic resonance apparatus, particularly in a gradient coil. Under the method, a low-frequency high voltage is applied to a conductor, and signals resulting from an adjacent high voltage are measured within a frequency range located in the kHz range, particularly from 40 to 400 kHz. The signals are analyzed in order to determine partial discharges. The conductor is again c...

The present invention provides a self-replenishing liquid water source onboard an automobile for supplying liquid water to an electrolyzer, such as an on-board hydrogen generator useful for the suppression of unwanted emissions. While automobiles typically have water reservoirs resupplied by a person, the invention provides a passive means of water collection for reliable replenishment due to operations of the automobile itself. The invention provides condensate from the engine exhaust gas by co...

There is described an infra-red radiation source comprising an electrically conductive element (2) formed of a plurality of carbon fibres and connection means (3, 4, 5) for connecting the electrically conductive element (2) across an electrical power supply, said connection means (3, 4, 5) including at least one support member (3) formed of carbon and secured to one end of the electrically conductive element (2).

A method of determining the far-field signature of the seismic wave produced by at least one marine seismic source (20) involving mounting pressure sensing means (2) on the or each seismic source (20) and taking account of both linear and nonlinear components of pressure measurements made by the pressure sensing means (2) to determine the far-field signature of the seismic wave. The invention covers the generation of a seismic wave from a single seismic source and an array of seismic sources and...