Abstract: An optical device may include a separating element to separate an optical signal into a plurality of spectral bands that are spatially or angularly separated along a band separation direction. Spectral ranges may differ among each spectral band of the plurality of spectral bands. The optical device may include a dispersive element comprising a plurality of dispersive regions. A dispersive region of the plurality of dispersive regions may disperse spectral components of a spectral band, of the plurality of spectral bands, along a dispersion direction to form a dispersed spectral band. The optical device may include a plurality of optical elements. An optical element of the plurality of optical elements may manipulate the dispersed spectral band in association with imaging the spectral band onto a detector area of a detector array. The optical device may include the detector array comprising the detector area.

Abstract: An optical system may include an optical source to provide an excitation light and a collecting element to direct an optical signal, received from a sample in response to incidence of the excitation light on the sample, to an optical device. The optical device may include a separating element to separate the optical signal into a plurality of spectral bands that are spatially or angularly separated along a band separation direction, a dispersive element comprising a dispersive region to disperse spectral components of a spectral band along a dispersion direction to form a dispersed spectral band, and an optical element to manipulate the dispersed spectral band in association with imaging the spectral band onto a detector area of a detector array. The optical system may include a controller to obtain one or more read-out signals from the detector array.

Abstract: Method of generating laser pulses using a semiconductor laser diode as a lasing amplification medium of an extended laser cavity are presented. Passive self-modulated mode-locked operation of the semiconductor laser diode is achieved by providing an above lasing threshold direct current input current to the semiconductor laser diode while the semiconductor laser diode is operational in a slightly misaligned extended laser cavity favoring the amplification of wavelengths shorter than a center wavelength of a continuous wave operational mode of the semiconductor laser diode at threshold.

Abstract: An electronic circuit senses that at least one circuit of rectifying diodes has been opened and response initiates an alarm. To sense one of the diode circuits being opened, the electronic circuit detects a temporary crossing of a low threshold by a DC voltage supplied at the rectifier output. The circuit is particularly applicable to high-power transformer-rectifiers aboard aircraft.