Abstract:
本發明之實施例提供一雷射式材料加工系統,用於液體輔助式、超短脈動(USP)雷射微機械加工。材料加工應用之範例包含在接近透明的玻璃工作部件(基材)上使用n x m陣列之聚焦雷射光束進行平行加工,以鑽通孔或盲孔。本發明揭露之方法以及系統可形成細間距排列的低錐度且高深寬比的複數個孔。
Abstract in simplified Chinese:本发明之实施例提供一激光式材料加工系统,用于液体辅助式、超短脉动(USP)激光微机械加工。材料加工应用之范例包含在接近透明的玻璃工作部件(基材)上使用n x m数组之聚焦激光光束进行平行加工,以钻通孔或盲孔。本发明揭露之方法以及系统可形成细间距排列的低锥度且高深宽比的复数个孔。
Abstract:
PROBLEM TO BE SOLVED: To disclose a p-type semiconductor zinc oxide (ZnO) film, and a method of manufacturing the film.SOLUTION: The film is simultaneously added with phosphorus (P) and lithium (Li). A light path of a pulse laser is arranged so that the pulse laser comes in a substrate from the rear side of the substrate, passes through the substrate and condenses on a target. The substrate is subject to translation movement toward the target, and this arrangement enables deposition of a fine pattern using an ablation plume route. The ablation plume route is present in a one-dimensional transition stage along a normal vector of the target before an angle width of the plume expands in three-dimensional adiabatic expansion. A fine film deposition pattern having a size similar to a laser condensation spot is thus obtained, and a new method of direct film deposition on a patterned material is obtained.
Abstract:
PROBLEM TO BE SOLVED: To increase the energy storage potential in an optical fiber amplifier and to produce peak power and pulse energy which are higher than those achievable in single-mode (SM) fibers before the onset of undesirable nonlinearity and gain saturation.SOLUTION: An optical amplification system comprises: a fiber oscillator 10 as a laser source generating an input beam having a nearly diffraction limited mode; a multi-mode fiber amplifier 12; a mode converter 14 receiving the input beam and converting the mode of the input beam to match a fundamental mode of the multi-mode fiber amplifier 12, and providing a mode-converted input beam to the multi-mode fiber amplifier 12; and a pump source 20 optically pumping the multi-mode fiber amplifier 12 to generate an intense amplified beam substantially in the fundamental mode.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for scribing or welding a transparent material.SOLUTION: Ultra-short laser pulse is used for scribing a transparent material and to create a multiple scribe features by the single pass of the laser beam across the material, and at least one of the scribe features is formed below the surface of the material to enable the clean cleavage. In the method for welding the transparent material, the ultra-short laser pulse is used to create the joining through the localized heating. The ultra-short pulse duration time causes the nonlinear absorption of the laser radiation, and the high repetition rate of the laser causes the pulse-to-pulse accumulation of the heat in the material. The laser is converged in the vicinity of an interface of the material, and generates the high energy fluence in the region to be welded, minimize the damage on a remaining portion of the material, and enables a beautiful weld line.
Abstract:
PROBLEM TO BE SOLVED: To provide: a fiber minimized in an amount of polarization mode coupling and polarization mode dispersion and increased in a polarization maintaining function; a polarization maintaining fiber in which pump light is guided inside an inner cladding while a large outside cladding ensures a reduction of mode-coupling inside a fiber core; a system; and a fiber laser.SOLUTION: A polarization maintaining fiber includes: a multi-mode fiber core doped with a rare-earth doping material; a first cladding surrounding the multi-mode fiber core; and a stress producing region provided in the first cladding and producing birefringence which allows single-mode light to transmit through the multi-mode fiber core without causing waveform distortions in a range of a specified fiber length, in the multi-mode fiber core.
Abstract:
PROBLEM TO BE SOLVED: To design photonic bandgap fibers having desired dispersion characteristics, wide transmission bands and lower transmission loss.SOLUTION: An optical fiber 300 comprises a core 302 surrounded by a cladding 304 comprising substantially circular concentric ring-shaped regions 306, 308 with high and low refractive index, respectively. Smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. The thickness of the high-index ring-shaped region 306 closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low-index cladding features distributed along concentric rings or circles are used for achieving wide bandgaps.
Abstract:
PROBLEM TO BE SOLVED: To design an optical fiber which has a desired dispersion feature.SOLUTION: Many structures included in this description includes a photonic bandgap fiber designed so as to provide a desired dispersion spectrum. Further, designs for attaining a wide transmission band and low transmission loss are also discussed. For example, some fiber designs provide small flat dispersion over a wide spectrum range with smaller dimensions of a high refractive index material of a cladding and a large size of a core. In another embodiment, the thickness of a high refractive index ring formation region closest to the core is large enough to provide negative dispersion or no dispersion at a desired wavelength. Further, features of the low refractive index cladding distributed along a concentric ring or circle can be used to obtain a wide bandgap.
Abstract:
PROBLEM TO BE SOLVED: To generate peak intensity and pulse energy larger than those achieved with a single mode (SM) fiber, by increasing capacity for accumulating energy in an optical fiber amplifier before undesirable non-linearity and gain saturation start. SOLUTION: This optical amplifier includes: a fiber oscillator 10 serving as a laser source, which generates an input beam having a mode close to diffraction limit; a multiple mode fiber amplifier 12; a mode converter 14; and a pump source 20. The mode converter 14 receives an input beam, converts a mode of the input beam to conform to a basic mode of the multiple mode fiber amplifier 12, and generates a mode-converted input beam to be input to the multiple mode fiber amplifier 12. The pump source 20 optically pumps the multiple mode fiber amplifier 12, and generates a strong output beam which is intrinsically amplified by the basic mode. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fiber increased in polarization maintaining ability while reducing the amount of polarization mode coupling and polarization mode dispersion, and to provide a highly efficient fiber amplifier or laser with a large outer diameter for maintaining polarization so that pump light is guided in an inside clad while a large outside clad ensures the decrease of fiber core inner mode coupling. SOLUTION: The polarization maintaining fiber has a fiber core of multimode having an elliptic cross section; a first clad that surrounds the fiber core; a second clad that surrounds the first clad, and a coating that surrounds the second clad. The first clad has a circular cross section, and the second clad has a noncircular cross section. Single mode light is propagated to the fiber core. COPYRIGHT: (C)2009,JPO&INPIT