Abstract: It is an object of the invention to provide a method and a corresponding laser system that are simple and robust and that are able to provide sub-100 fs laser pulses using nonlinear frequency-conversion. The method of the invention comprises the steps of generating pulsed laser radiation at a fundamental wavelength, increasing the spectral bandwidth of the laser radiation by passing the laser radiation through a periodically poled nonlinear crystal material whose poling period is larger than or smaller than the poling period satisfying the quasi-phase-matching condition at the fundamental wavelength, and frequency-converting the spectrally broadened laser radiation.

Abstract: A barbed or razor wire crossing apparatus and system that enable the safe passage for a user either over or between barbed or razor wire. Also a game carrying kit that enables a hunter to field dress an animal and to prevent or greatly limit the spread or exposure of the hunted game's blood during transportation.

Abstract: A method for generating pulsed laser radiation in the spectral range from 860 nm to 1000 nm is disclosed, including the steps of generating pulsed laser radiation in the spectral range from 1500 nm to 1600 nm, preferably at a wavelength of 1560 nm; shifting the wavelength of the pulsed laser radiation to a longer wavelength of at least 1720 nm, and preferably to 1840 nm; amplifying the wavelength-shifted pulsed laser radiation in a Thulium-doped gain medium so that the Thulium-doped gain medium is pumped in an in-band pumping scheme; and frequency-doubling the amplified wavelength-shifted pulsed laser radiation. A laser system suitable for practicing the method is also disclosed.

Abstract: It is an object of the invention to provide a method and a corresponding laser system that are simple and robust and that are able to provide sub-100 fs laser pulses using nonlinear frequency-conversion. The method of the invention comprises the steps of generating pulsed laser radiation at a fundamental wavelength, increasing the spectral bandwidth of the laser radiation by passing the laser radiation through a periodically poled nonlinear crystal material whose poling period is larger than or smaller than the poling period satisfying the quasi-phase-matching condition at the fundamental wavelength, and frequency-converting the spectrally broadened laser radiation.

Abstract: A method for generating pulsed laser radiation in the spectral range from 860 nm to 1000 nm is disclosed, including the steps of generating pulsed laser radiation in the spectral range from 1500 nm to 1600 nm, preferably at a wavelength of 1560 nm; shifting the wavelength of the pulsed laser radiation to a longer wavelength of at least 1720 nm, and preferably to 1840 nm; amplifying the wavelength-shifted pulsed laser radiation in a Thulium-doped gain medium so that the Thulium-doped gain medium is pumped in an in-band pumping scheme; and frequency-doubling the amplified wavelength-shifted pulsed laser radiation. A laser system suitable for practicing the method is also disclosed.

Abstract: An apparatus for generating laser pulses by non-linear four-wave mixing, including a pump laser source to emit a pump beam of femtosecond laser pulses at a pump wavelength, the pump laser source configured to couple the pump beam into a first beam path and an idler beam into a second beam path; a chirp unit to receive the pump beam from the pump laser source configured to temporally stretch the laser pulses, wherein the chirp unit is arranged in the first beam path before a parametric conversion unit; and wherein the parametric conversion unit receives the pump beam from the chirp unit and is configured to produce a signal beam at a signal wavelength by four-wave mixing in a non-linear optical medium, the parametric conversion unit receiving the idler beam via the second beam path, and the pump beam and the idler beam being superimposed in the non-linear optical medium.

Abstract: The invention relates to an apparatus for generating laser pulses by non-linear four-wave mixing. It is an object of the invention to provide a technique which enables the generation of short laser pulses in the wavelength ranges between 800 nm and 1000 nm or between 1100 nm and 1500 nm based on a four-wave mixing process using a rare earth doped femtosecond laser as a pump source. The apparatus of the invention comprises: a pump laser source to emit a pump beam of femtosecond laser pulses at a pump wavelength; a chirp unit to receive the pump beam from the pump laser source and configured to temporally stretch the laser pulses; and a parametric conversion unit to receive the pump beam from the chirp unit and configured to produce a signal beam at a signal wavelength by four-wave mixing in a non-linear optical medium. Moreover, the invention relates to a method for generating laser pulses by non-linear four-wave mixing.

Abstract: A method and system for delivering laser pulses achieves the delivery of high quality laser pulses at the location of an application. The method includes the steps of: generating laser pulses, amplifying the laser pulses, temporally stretching the amplified laser pulses, and propagating the amplified laser pulses through an optical delivery fiber of desired length, wherein the laser pulses are temporally compressed in the optical delivery fiber and wherein the laser pulses undergo nonlinear spectral broadening in the optical delivery fiber.

Abstract: A method and system for delivering laser pulses achieves the delivery of high quality laser pulses at the location of an application. The method includes the steps of: generating laser pulses, amplifying the laser pulses, temporally stretching the amplified laser pulses, and propagating the amplified laser pulses through an optical delivery fiber of desired length, wherein the laser pulses are temporally compressed in the optical delivery fiber and wherein the laser pulses undergo nonlinear spectral broadening in the optical delivery fiber.

Abstract: A method and system for delivering laser pulses achieves the delivery of high quality laser pulses at the location of an application. The method includes the steps of: generating laser pulses, amplifying the laser pulses, temporally stretching the amplified laser pulses, and propagating the amplified laser pulses through an optical delivery fiber of desired length, wherein the laser pulses are temporally compressed in the optical delivery fiber and wherein the laser pulses undergo nonlinear spectral broadening in the optical delivery fiber.

Abstract: A method and system for delivering laser pulses achieves the delivery of high quality laser pulses at the location of an application. The method includes the steps of: generating laser pulses, amplifying the laser pulses, temporally stretching the amplified laser pulses, and propagating the amplified laser pulses through an optical delivery fiber of desired length, wherein the laser pulses are temporally compressed in the optical delivery fiber and wherein the laser pulses undergo nonlinear spectral broadening in the optical delivery fiber.

Abstract: A device for generating light pulses includes a seed laser source for generating input light pulses. An optical pre-amplifier having variable gain receives the input light pulses from the seed laser source. An optical power amplifier receives the light pulses from the optical pre-amplifier and amplifies and compresses the received light pulses. The light pulses are compressed in the optical power amplifier in such a manner that the pulse duration of the output light pulses of the optical power amplifier is tunable via adjusting the gain of the optical pre-amplifier. Wavelength-tunable light pulses are obtained by supplying the output light pulses of the optical power amplifier to a highly non-linear optical fiber.

Abstract: A device for generating light pulses includes a seed laser source for generating input light pulses. An optical pre-amplifier having variable gain receives the input light pulses from the seed laser source. An optical power amplifier receives the light pulses from the optical pre-amplifier and amplifies and compresses the received light pulses. The light pulses are compressed in the optical power amplifier in such a manner that the pulse duration of the output light pulses of the optical power amplifier is tunable via adjusting the gain of the optical pre-amplifier. Wavelength-tunable light pulses are obtained by supplying the output light pulses of the optical power amplifier to a highly non-linear optical fiber.