Diffractive optical elements with continuous relief fabricated by focused ion beam for monomode fiber coupling
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TLDR
The design meets the application's requirement for fiber coupling, and that DOE's manufactured by the FIB technology are practicable, and the system has the advantages of simplicity, short focal length, low cost for the lens and high coupling efficiency.Abstract:
The design, microfabrication and testing of diffractive optical elements (DOE's) with continuous relief used for fiber coupling are discussed in detail. DOE's with diameters as small as 50 mm are fabricated by means of focused ion beam (FIB) technology. A focused Ga+ ion beam is used to mill a continuous relief microstructure at a 50 kV acceleration voltage. The optical performance of DOE's made in this way was compared with that of DOE's fabricated by other methods. The focusing performance of DOE's fabricated with three and six annulus by FIB milling was investigated. Testing of the system which has a coupling efficiency of -1.25 dB (75%) shows that the design meets the application's requirement for fiber coupling, and that DOE's manufactured by our FIB technology are practicable. Compared with a conventional fiber coupling system that uses a plano - convex lens, our system has the advantages of simplicity, short focal length, low cost for the lens and high coupling efficiency.read more
Citations
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Focused Ion Beam Nanopatterning for Optoelectronic Device Fabrication
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Investigation of physical properties of quartz after focused ion beam bombardment
TL;DR: In this article, the optical properties and phase change of a commonly used glass, quartz, were investigated before and after focused ion beam (FIB) bombardment with ion energy from 30 to 50 keV.
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FIB-milling of photonic structures and sputtering simulation
TL;DR: In this article, focused ion beam milling is used to sputter simple geometric structures to investigate sputter depth dependence on parameters like ion fluence, beam diameter, and scanning strategy and second to structure photonic crystal etching masks and Fresnel micro-lenses in various materials.
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Integration of microdiffractive lens with continuous relief with vertical-cavity surface-emitting lasers using focused ion beam direct milling
TL;DR: In this paper, a diffractive lens with continuous relief, diameter of 140 /spl mu/m, and six annulus was designed and fabricated using FIB direct milling on the backside of VCSEL with GaAs substrate for beam collimation.
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Three-dimensional patterning and morphological control of porous nanomaterials by gray-scale direct imprinting
TL;DR: This work opens a rapid and low-cost route for fabricating novel nanostructures and devices utilizing porous nanomaterials, with promising applications spanning diffractive and plasmonic sensing, holography, micro- and transformation optics, and drug delivery and imaging.
References
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Laser Diode to Single-Mode Fiber Coupling with Ball Lenses
TL;DR: In this article, an analysis of the efficiency of the couplage entre a diode laser monomode and a fibre optique monomodel for coupleurs a lentilles spherique is presented.
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Coupling characteristics of lens systems for laser diode modules using single-mode fiber.
TL;DR: It is confirmed that lens systems using virtual fibers offer better coupling characteristics than does the conventional coupling method.
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Tunable vertical-cavity laser diodes with submilliamp threshold currents and efficient fiber coupling
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