摘要:
Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a first region having index delta percent Δ2, a depressed-index annular portion having Δ3, and a third annular region surrounding the depressed annular region comprising refractive index delta percent Δ4; wherein Δ1MAX>Δ4>Δ2>Δ3, wherein the difference between Δ4 and Δ2 is greater than or equal to 0.03%.
摘要:
Flow-through substrates, such as honeycombs, comprising certain zeolites. The flow-through substrates may be used, for example, in the removal of a heavy metal from a fluid such as a gas stream.
摘要:
Transparent glass sheets having increased mechanical strength include an inner layer surrounded by surface compressive layers wherein the difference of the coefficient of thermal expansion of the inner layer and the surface compressive layer is greater than 50×10−7° C.−1 and wherein the surface compressive layer has a compressive stress of at least about 300 MPa.
摘要:
According to an embodiment of the invention a method of manufacturing optical fiber cane comprises the steps of: (i) providing a core rod manufactured of relatively low viscosity glass; (ii) depositing SiO2 based soot around the core rod to form a soot preform, the soot being of relatively high viscosity material such that the softening point of the low viscosity glass is at least 200° C. lower than the viscosity of the high viscosity outer core region; and (iii) consolidating the soot of the soot preform by exposure to hot zone at temperatures of 1000° C.-1600° C. The soot is consolidated by heating the outer portion of the soot preform at a relatively fast heating rate, the heating rate being sufficient to densify the soot, so as to render the densified material with enough rigidity to confine the heated core rod and to prevent the heated core rod from puddling.
摘要:
An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r2>8 microns and refractive index Δ2 and a second outer cladding region surrounding the inner cladding region having refractive index Δ3, wherein Δ1>Δ3>Δ2. The difference between Δ3 and Δ2 is greater than 0.01. The fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and r1/r2 is greater or equal to 0.25.
摘要:
An optical fiber with a glass core extending from a centerline to a radius R1 wherein R1 is greater than about 5 μm; a glass cladding surrounding and in contact with the core. The cladding has a depressed annular region, the inner radius of said depressed annular region is spaced from said core a distance greater than 1 μm and less or equal to than 5 μm. The core and the cladding provide a fiber with cable cutoff less than 1550 nm, and an effective area at 1550 nm greater than 120 μm2 and bend loss of ≦0.7 dB/turn on a 20 mm diameter mandrel.
摘要:
A microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber comprising: a core region disposed about a longitudinal centerline and having a refractive index profile with a first refractive index, and a cladding region surrounding the core region, the cladding region comprising an annular void-containing region comprised of non-periodically disposed voids; wherein maximum void diameter in nm is given by Dmax and the maximum void length in cm is not greater than 2.5×105×(dmax)−1.7.
摘要:
Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index.
摘要:
An optical fiber includes a core, an inner cladding and a low index ring of silica-based glass. The core comprises silica-based glass, an index of refraction n1, and a relative refractive index percent Δ1% relative to pure silica glass. The inner cladding surrounds the core and comprises an index of refraction n2 and a relative refractive index percent Δ2% relative to pure silica glass, wherein Δ1%>Δ2% and the difference between Δ1% and Δ2% is greater than about 0.1%. The low index ring surrounds the inner cladding and comprises silica glass co-doped with boron and fluorine, a radial thickness of less than about 20 μm, an index of refraction n3 and a third relative refractive index percent change Δ3% relative to pure silica glass, wherein Δ2%>Δ3% and Δ3% is less than about −1.0%.
摘要:
Disclosed are synthetic silica glass having a low polarization-induced birefringence, process for making the glass and lithography system comprising optical element made of the glass. The silica glass has a polarization-induced birefringence measured at 633 nm of less than about 0.1 nm/cm when subjected to excimer laser pulses at about 193 nm having a fluence of about 40 μJ·cm−2·pulse−1 and a pulse length of about 25 ns for 5×109 pulses.