Abstract:
A method of tailoring beam characteristics of a laser beam during fabrication of an electronic device. The method includes: providing a substrate comprising one or more layers; adjusting one or more characteristics of a laser beam; and impinging the laser beam having the adjusted beam characteristics on the substrate to carry out at least one process step for fabricating the electronic device. The adjusting of the laser beam comprises: perturbing the laser beam propagating within a first length of fiber to adjust the one or more beam characteristics of the laser beam in the first length of fiber or a second length of fiber or a combination thereof, the second length of fiber having two or more confinement regions; coupling the perturbed laser beam into the second length of fiber; and emitting the laser beam having the adjusted beam characteristics from the second length of fiber.
Abstract:
Embodiments of the present invention generally relate to fiber designs for wavelength tunable ultra-short pulse lasers. More specifically, embodiments of the present invention relate to systems incorporating fiber designs for higher order mode fibers capable of soliton self frequency shifting where a system comprises a first fiber for shifting the wavelength from a pump wavelength to a transfer wavelength and a second fiber for shifting the pulse from the transfer wavelength to an output wavelength. In one embodiment of the present invention, a wavelength tunable short pulse fiber laser system comprises: a pulse generator for providing a pulse having an input wavelength; a mode-converter; a first designed fiber for shifting the pulse from the input wavelength to a transfer wavelength; and a second designed fiber for shifting the pulse from the transfer wavelength to an output wavelength.
Abstract:
One aspect of the invention is a graded index multimode optical fiber. The optical fiber includes a core region extending radially outwardly from a centerline to a radius R| and having a positive relative refractive index percent profile Δi(r). The core region has a maximum relative refractive index percent, Δ MAX . The optical fiber also includes a first annular cladding region surrounding and directly adjacent to the core region and extending to a radius R 2 , having a width W 2 of R 2 -R 1 . The first annular cladding region has a relative refractive index percent profile Δ3(r), with a minimum relative refractive index percent, Δ 2MIN .In addition, the optical fiber includes a second annular cladding region surrounding the first annular cladding region and having a relative refractive index percent profile, Δ 3(r) , with a maximum relative refractive index percent, Δ 3MAX , wherein Δ 3MAX is ≥ 0.05%.
Abstract:
A low attenuation optical waveguide fiber having medium dispersion is disclosed. The core and the cladding are selected to provide a spectral attenuation at 1550 nm of less than 0.195 dB/km. The optical fiber exhibits an effective area of greater than about 60 µm2 at a wavelength of about 1550 nm, a dispersion slope of less than 0.07 ps/nm2/km at a wavelength of about 1550 nm, and a zero-dispersion wavelength of less than about 1500 nm.
Abstract:
Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3 + 10log[(1-e- (0.19)(50)/4.343 )/(1- e-(a)(L)/4.343 )], wherein L is the length in km and a is the attenuation in dB/km at 1550 nm, and a fiber cutoff wavelength of less than 1400 nm.
Abstract:
Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3 + 10log[(1-e -(0,19)(50)/4,343 )/(1-e -(α)(L)/4,343 )], wherein L is the length in km and α is the attenuation in dB/km at 1550 nm, and a fiber cutoff wavelength of less than 1400 nm.
Abstract:
An optical field concentrator includes a plurality of waveguide layers comprising high index materials having a first defined thickness. At least one nano-layer structure is positioned between said waveguide layers. The at least one nano-layer structure comprises low index materials having a second defined thickness that is smaller than the first defined thickness. A plurality of cladding layers are positioned between the waveguide layers and the at least one nano-layer structure. The cladding layers have a third defined thickness that is larger than the first defined thickness.
Abstract:
The present invention relates in general to coupling of light from one or more input waveguides to an output waveguide or output section of a waveguide having other physical dimensions and/or optical properties than the input waveguide or waveguides. The invention relates to an optical component in the form of a photonic crystal fibre for coupling light from one component/system with a given numerical aperture to another component/system with another numerical aperture. The invention further relates to methods of producing the optical component, and articles comprising the optical component, and to the use of the optical component. The invention further relates to an optical component comprising a bundle of input fibres that are tapered and fused together to form an input coupler e.g. for coupling light from several light sources into a single waveguide. The invention still further relates to the control of the spatial extension of a guided mode (e.g. a mode-field diameter) of an optical beam in an optical fibre. The invention relates to a tapered longitudinally extending optical waveguide having a relatively larger crosssection that over a certain longitudinal distance is tapered down to a relatively smaller cross section wherein the spatial extent of the guided mode is substantially constant or expanding from the relatively larger to the relatively smaller waveguide cross section. The invention may e.g. be useful in applications such as fibre lasers or amplifiers, where light must be coupled efficiently from pump sources to a double clad fibre.