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:
A method is provided that includes: forming a low-index trench region (112) with a first density; forming an inner barrier layer (116a) comprising silica around the trench region at a second density greater than the first density; depositing silica-based soot around the first barrier layer to form an overclad region (114) at a third density less than the second density; inserting a core cane (102) into a trench-overclad structure; forming an outer barrier layer (116b) comprising silica in an outer portion of the overclad region at a fourth density greater than the third density; flowing a down dopant-containing gas through the trench-overclad structure (110) to dope the trench region with the down dopant, and wherein the barrier layers (116a,116b) mitigate diffusion of the down-dopant into the overclad region (114); and consolidating the trench-overclad and the core cane. A method of making a consolidated trench-overclad structure with inner and outer barrier layers is also provided.
Abstract:
An optical fiber having a core comprising silica and greater than 1.5 wt% chlorine and less than.5 wt% F, said core having a refractive index Δ1MAX, and a inner cladding region having refractive index Δ2MIN surrounding the core, where Δ1MAX > Δ2MIN.
Abstract:
The present disclosure is directed to a method of making an optical fiber with improved bend performance, the optical fiber having a core and at least one cladding layer, and a chlorine content in the in the last layer of the at least one cladding layer that is greater than 500 ppm by weight. The fiber is prepared using a mixture of a carrier gas, a gaseous chlorine source material and a gaseous reducing agent during the sintering of the last or outermost layer of the at least one cladding layer. The inclusion of the reducing gas into a mixture of the carrier gas and gaseous chlorine material reduces oxygen-rich defects that results in at least a 20% reduction in TTP during hydrogen aging testing.
Abstract:
Method for adapting a fiber beam combiner to transmit at least 20 kW of optical power without noticeable bulk material damage mechanism effect and destructive nonlinearities, the method comprising: connecting an adiabatic beam combiner with a splice connection to an input facet of a graded index fiber which has a core doped with an index increasing material, further comprising the step(s) of: restricting the numerical aperture of the graded index fiber, and/or selecting the index increasing material with a Raman gain lower than that of Ge0 2 such as Al2O3 or Y2O3, and/or placing a shroud tube around the graded index fiber core, said shroud tube comprising a fluorine-doped silica tube.
Abstract:
The invention concerns a multimode optical fiber, with a graded-index core co- doped with at least fluorine F and germanium GeO 2 and a refractive index profile with at least two α-values. According to the invention, the concentration of fluorine F at the core center ([ F ] r=0 ) is between 0 and 3wt% and the concentration of fluorine F at the core outer radius ([ F ] r=a ) is between 0.5wt% and 5.5wt%, with [ F ] r=a - [ F ] r= > 0.4wt%. For wavelengths comprised between 850nm and 1100nm, said multimode optical fiber has an overfilled launch bandwidth (OFL-BW) greater than 3500MHz.km and a calculated effective modal bandwidth (EMBc) greater than 4700MHz.km over a continuous operating wavelength range greater than 150nm.
Abstract translation:本发明涉及一种多模光纤,其具有至少掺杂有氟F和锗GeO 2的折射率芯和具有至少两个α值的折射率分布。 根据本发明,核心中心处的氟F浓度([F] r = 0)为0〜3重量%,核心外径处的氟F浓度([F] r = a))为0.5 wt%和5.5wt%,[F] r = a - [F] r => 0.4wt%。 对于850nm和1100nm之间的波长,所述多模光纤具有大于3500MHz.km的过满的发射带宽(OFL-BW),并且在大于150nm的连续工作波长范围内的计算有效模式带宽(EMBc)大于4700MHz.km 。
Abstract:
극저손실 광섬유는 실리카 대비 높은 상대굴절율차를 가지는 코어와 실리카보다 낮은 상대굴절율차를 가지는 클래딩을 포함한다. 코어의 실리카 굴절률 대비 상대굴절율차는 예를 들어 0.0030 이상 0.0055 이하이며, 클래딩의 실리카 굴절률 대비 상대굴절율차는 -0.0020 이상 -0.0003 이하이다. 극저손실 광섬유는, 1310nm 파장에서 광손실이 0.324dB/km 이하, 1383nm 파장에서 광손실이 0.320dB/km 이하, 1550nm 파장에서 광손실이 0.184dB/km 이하, 그리고 1625nm에서 0.20dB/km 이하를 동시에 가지는 손실특성을 갖는다. 극저손실 광섬유는 인출 과정 중 광섬유 표면온도가 유리 천이 구간 내의 온도범위를 가질 때 과냉각된다.
Abstract:
Methods of making an optical fiber preform comprising in order: (a) manufacturing a glass preform with at least one porous layer; (b) exposing the glass preform with the layer(s) to a fluorine precursor at a temperature below 1295 °C to dope with fluorine, and (c) exposing the fluorine doped glass preform to temperatures above 1400 °C to completely sinter the preform. Preferably, the porous silica based layer(s) of the glass preform exposed to fluorine is pre-densified to have an average density of at least 0.7 g/cm 3 but less than 1.9 g/ cm 3 ; prior to pre-densification the density is preferably under 0.65 g/ cm 3. All methods result in a fluorine doped profile for forming a trench region of an optical fiber having an inner trench region (adjacent the core or inner cladding formed on a core) and an outer trench region (adjacent a later formed outer cladding), the ratio of fluorine concentrations between said inner and outer regions is
Abstract translation:制造光纤预制件的方法包括:(a)制造具有至少一个多孔层的玻璃预制件; (b)在低于1295℃的温度下将具有层的玻璃预制件暴露于氟前体以掺杂氟,以及(c)将掺杂氟的玻璃预制件暴露于高于1400℃的温度以完全烧结预制件 。 优选地,暴露于氟的玻璃预制件的多孔二氧化硅基层被预先致密化,以具有至少0.7g / cm 3但小于1.9g / cm 3的平均密度; 在预致密化之前,密度优选在0.65g / cm 3以下。 所有方法都产生氟掺杂分布,用于形成具有内沟槽区(邻近形成在芯上的芯或内包层)和外沟槽区(邻近后形成的外包层)的光纤的沟槽区, 所述内部和外部区域之间的氟浓度<0.4。