Journal ArticleDOI
Microlens for coupling a semiconductor laser to a single-mode fiber
H. Ghafoori-shiraz,T. Asano +1 more
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TLDR
Simple conical microlenses are fabricated on the end of a vapor-axial-deposition single-mode fiber to increase the coupling efficiency between the laser diode and the single- mode fiber.Abstract:
Simple conical microlenses are fabricated on the end of a vapor-axial-deposition single-mode fiber to increase the coupling efficiency between the laser diode and the single-mode fiber. The lowest coupling loss, 3 dB, has been achieved by using a 1.3-μm InGaAsP buried-heterostructure laser diode and a single-mode fiber. Experimental results on coupling efficiency and the loss penalty due to lateral misalignment are also reported. This conical lens is easy to manufacture and reproduce.read more
Citations
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Journal ArticleDOI
Ideal microlenses for laser to fiber coupling
TL;DR: In this paper, the design and fabrication of ideal microlenses for semiconductor laser to fiber coupling are reported, which can theoretically collect 100% of the radiated energy of a modal-symmetric laser source.
Journal ArticleDOI
Design and fabrication of a microlens array by use of a slow tool servo
Allen Y. Yi,Lei Li +1 more
TL;DR: This research demonstrates the development of an innovative diamond tool trajectory that allows the entire microlens array to be machined in a single operation and can produce microlenses with accurate geometry and optical surface finish.
Journal ArticleDOI
Near 100% efficient fibre microlenses
TL;DR: In this paper, a microlenses have been fabricated directly on the ends of optical fibres which demonstrate 90% (-0.45 dB) coupling efficiencies to semiconductor lasers.
Journal ArticleDOI
Comparison of 127I2-stabilized frequency-doubled Nd:YAG lasers at the Bureau International des Poids et Mesures.
S. Picard,Lennart Robertsson,Long-Sheng Ma,K. Nyholm,Mikko Merimaa,Tero E. Ahola,P. Balling,Petr Kren,Jean-Pierre Wallerand +8 more
TL;DR: A frequency comparison was carried out between iodine-stabilized Nd:YAG lasers at 532 nm from the Bureau International des Poids et Mesures, the Centre for Metrology and Accreditation, the Czech Metrology Institute, and the Bureau National de Métrologie-Institut National de
Journal ArticleDOI
Single-mode fiber microlens with controllable spot size
Chris W. Barnard,John W. Y. Lit +1 more
TL;DR: A novel method for fabricating microlenses on tapered single-mode fibers is shown to be able to control the lens spot size and a theoretical calculation of the focused spot size agrees well with experimental results.
References
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Journal ArticleDOI
Microlenses for coupling junction lasers to optical fibers.
TL;DR: A novel photolithographic technique was used to make hemispherical and hemicylindrical microlenses, with diameters between 4 microm and 10 microm, from commercially available negative type photoresist that is transparent at ir laser wavelengths.
Journal ArticleDOI
Efficient coupling from semiconductor lasers into single-mode fibers with tapered hemispherical ends.
TL;DR: An efficient coupling from semiconductor lasers in the 1.3-microm range into single-mode fibers with tapered hemispherical ends (TH fiber) is described and it was found that changes in laser characteristics due to reflected light are far less for TH fiber coupling than for flat-end coupling.
Journal ArticleDOI
Chemically etched conical microlenses for coupling single-mode lasers into single-mode fibers
Gadi Eisenstein,D Vitello +1 more
TL;DR: A simple method to selectively etch a fiber end to produce a conical lens whose base coincides with the fiber core is proposed and it is found that high coupling efficiency is expected in cases of practical interest.
Journal ArticleDOI
Characteristics of a hemispherical microlens for coupling between a semiconductor laser and single-mode fiber
TL;DR: In this article, a hemispherical microlens is fabricated on the end of a single-mode fiber by an electric arc discharge technique, which improves coupling efficiency between InGaAsP lasers with buried heterostructure geometry and singlemode fiber.
Journal ArticleDOI
Design of a miniature lens for semiconductor laser to single-mode fiber coupling
TL;DR: In this article, a design method for a miniature optical lens tipped on a singlemode fiber end to improve power coupling from a semiconductor laser is described, and the optimum coupling conditions and the obtained coupling efficiency are represented in terms of laser beam and fiber parameters.
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Chemically etched conical microlenses for coupling single-mode lasers into single-mode fibers
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