Microlenses arrays: Fabrication, materials, and applications
The reliable creation of large-scale, high-aspect-ratio microlens arrays [1] [2][3] can impact several areas of photonics and quantum technology. Microlenses are used, for example, to collimate ...
The Technology for Manufacturing a Lensed Optical Fiber …
The creation of a microlens at the end of an optical fiber occurred in several stages: (1) selection of an optical resin; (2) applying an optical resin to an intermediate element and transferring it to the end of the optical fiber; (3) imparting a given shape to a drop under the action of a high-frequency vibration field; and (4) polymerization of the …
Asymmetric elliptic-cone-shaped microlens for efficient …
A new scheme of asymmetric elliptic-cone-shaped microlens (AECSM) employing a single-step fabrication technique for efficient coupling between the high-power 980-nm laser diodes and the single-mode fibers is proposed. A new scheme of asymmetric elliptic-cone-shaped microlens (AECSM) employing a single-step fabrication technique for efficient …
Review of the technology of a single mode fiber coupling …
A conical microlens on the tip of a fiber for improving the coupling efficiency (CE) of a laser diode and a single-mode fiber in butterfly packaging was experimentally fabricated via the grinding ...
aspherical microlens fiber grinder
aspherical microlens fiber grinder SUAMG Machinery is professional mineral processing equipment manufacturer in the world not our equipment has the excellent quality but also our product service is An aspherical microlens has a small diameter of about 780 181 m and a numerical aperture of The fabrication and The fabrication and assembly of the ...
New Scheme of Double-Variable-Curvature Microlens for …
The grinded fiber endface exhibited a double-variable curvature in the major axis, and was clearly observed for both major and minor axes after slight fusion polish. The perfect aspherical shape of the DVCM results in less grinding offset of 0.2 μm and better curvature radii control that leads to high average coupling efficiency of 83%.
A monolithic microlens for an ytterbium-doped
Here, we fabricated a fiber microlens in an ytterbium-doped double-cladding microstructured optical fiber for a fiber amplifier by CO 2-laser fusion. The microlens can combine the end-cap scheme, pump coupling and beam shaping. ... [13] Zhao K, Zhang B, Feng D and Song N 2018 Dynamics simulation and experiment of …
Fabrication of high aspect-ratio aspheric microlens array …
The toolpath for machining the MLA is generated as follows. The toolpath for a single lenslet in machine coordinates is illustrated in Fig. 3 a.The directions of the workpiece coordinate system (o w-x w y w z w) and the local lenslet coordinate system (o i-x i y i z i) are consistent with the machine coordinate system (o m-x m y m z m).The …
Microlens Arrays
Application of Microlens Arrays. Microlens arrays find applications in several areas of modern optics and optical products: A linear cylindrical lens array can collimate the radiation from all emitters of a diode bar (diode array), typically in the fast axis direction (FAC = fast axis collimator). Similarly, the output of a two-dimensional ...
Spherical Ball Micro Lenses
Spherical ball lenses are commonly used for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, and fiber-to-detector coupling. For laser-to-fiber, fiber-to-fiber, and fiber-to-detector coupling; High coupling efficiency; Easy to align; Four available diameters; See All Features
Optimizing the efficiency of a laser diode and single-mode fiber …
Apparently, the CE value for d = 3 μm decreases from 72.8 % to 52.4 % as WD increases from 4 μm to 8 μm. Therefore, when the GRIN fiber is far away from the aspherical lens, the coupling light will be influenced, which is similar to previous reports [22]. Thus, the mode field of the aspherical lens can match well with that of the GRIN …
New Scheme of Double-Variable-Curvature Microlens for …
A new scheme of a double-variable-curvature microlens (DVCM) employing a single-step grinding technique with fully automated fabrication for efficient coupling between high-power 980-nm laser diodes and single-mode fibers is proposed and demonstrated. The grinded fiber endface exhibited a double-variable curvature in the major axis, and was …
Liquid-shaped microlens for scalable production of …
The liquid shaping technique facilitates the fabrication of an ultrathin OCT fiber probe, which consists of a single-mode fiber, a non-core fiber (NCF), and a custom liquid-shaped microlens (Fig ...
Single-mode fiber with a plano-convex silicon microlens for …
A single-mode fiber with plano-convex silicon microlens is proposed for butt-coupling between single- mode fibers and high-index-contrast waveguides with fine mode-field diameter and experiments showed that the mode- field-diameter was successfully contracted from 10.5 to 1.3 microm with the lensed fiber. A single-mode fiber with plano …
(Sensors and Actuators A: Physical,147(1):093-098)Semi …
Semantic Scholar extracted view of "(Sensors and Actuators A: Physical,147(1):093-098)Semi-ellipsoid microlens simulation and fabrication for enhancing optical fiber coupling efficiency" by J. Y. Hu et al.
Schematic showing the laser coupling via (A) flat-end fiber …
The microlens fibers were precisely controlled by automatic grinding and calibrated spin-on-glass (SOG) liquid electrostatic coating to achieve the required minor radius of curvature of 1.3- $mu ...
Coupling efficiency of a laser diode to a single-mode fiber …
1. Introduction. In modern optical communications, a reduction in the coupling loss between the laser diode (LD) and a single-mode fiber (SMF) to enhance of the signal-to-noise ratio in optoelectronic packaging has become a vital topic for increasing the repeater spacing in long-haul and submarine transmission [1], [2], [3].The light emitted …
A New Scheme of Aspherical Microlense for Efficient …
We propose and demonstrate a new scheme of aspherical microlens (ASM) employing a single-step grinding technique with fully automated process for efficient coupling between the high-power 980-nm laser diodes and single mode fibers. The grinded fiber endface exhibited a double-variable curvature in the major axis, and was clearly observed for …
Investigation of aspherical microlens based on reflow …
Moreover, aspherical microlens was fabricated by utilizing UV lithography followed by the thermal reflow method. During preparation, the photoresist microlens was successfully transferred to the silicon substrate by precisely controlling the etching selection ratio. The anti-reflective film for air is prepared by an optical coater after ...
Coupling efficiency of laser diode to GRIN fiber by aspherical …
Fig. 3 (a) shows the simulated CE of LD to GRIN fiber by the aspherical lens for different waist radii of laser beam in the X and Y directions. Apparently, the CE values decrease linearly with increasing Y waist radius (w y).Specifically, when the X waist radius (w x) is 14 μm, the obtained CE value decreases from 89.5 % to 72.5 % as w y increases …
An aspherical microlens assembly for deep brain …
Semantic Scholar extracted view of "An aspherical microlens assembly for deep brain fluorescence microendoscopy." by Masaaki Sato et al. ... This study designs a compact and high-speed system for fluorescent imaging at the tip of a fibre, achieving a resolution of 1.18 ± 0.04 µm, and demonstrates in vivo observations of cell bodies and ...
Direct integration of aspherical microlens on vertical-cavity …
The aspherical microlens used for beam shaping of vertical-cavity surface emitting lasers (VCSELs) was designed and fabricated. The microlens designed as needed was directly fabricated and integrated in one step on the emitting surface of a VCSEL by femtosecond laser direct writing (FsLDW). By the microlens' shaping the beam quality of …
Effect of Grinding Offset and Radius of Curvature on …
Effect of Grinding Offset and Radius of Curvature on Coupling Efficiency of Aspherical Microlens for Coupling High-Power Laser to Fiber January 2012 DOI: 10.1364/CLEO_SI.2012.CTh1G.8
Yi-Cheng HSU | National Pingtung University of Science and …
Effect of Grinding Offset and Radius of Curvature on Coupling Efficiency of Aspherical Microlens for Coupling High-Power Laser to Fiber Conference Paper Jan 2012
Parabolic microlensed optical fiber for coupling efficiency …
Figure 2 shows a magnified view of a typical polydimethylsiloxane (PDMS) parabolic microlens attached to the end of an SMF optical fiber (9/125 µm) with refractive index of core, respectively, is 1.4675 at 1.310 µm and 1.4681 at 1.550 µm. A numerical aperture of 0.12 and a relative refractive index difference of 0.36%. Fig. 2.
Increasing semiconductor laser-optical fiber coupling …
Light coupling efficiency between LD and optical fiber, using this double plano-convex microlens, is 27.57% and 44.23% for single-mode and multi-mode fiber, respectively. View Show abstract
Ultra-long-working-distance spectroscopy of single
The outgoing light was introduced into a 50 µm-diameter step-index multimode optical fibre, whose NA was equal to 0.22, with the aid of a lens of f = 200 mm and diameter d = 70 mm positioned 350 ...
Review of the technology of a single mode fiber coupling to …
Abstract. In this paper, the technology of a single mode fiber coupling to a semiconductor laser diode has been summarized and the latest developments in the bulk optics coupling scheme and the microlens fiber coupling scheme have been reviewed. The review has focused on optimizing the optical structure and the coupling parameters to …
Schematic showing the laser coupling via (A) flat …
The microlens fibers were precisely controlled by automatic grinding and calibrated spin-on-glass (SOG) liquid electrostatic coating to achieve the required minor radius of curvature of 1.3- $mu ...
Lensed plastic optical fiber employing hyperbolic end …
The lens material is set up for UV-curable adhesive. The coupling efficiency of the designed aspherical lensed fiber is 86%. The coupling efficiencies of the hemispherical lensed fiber, whose radius is 72 μm, and the cleaved fiber, are 71% and 60%, respectively. The aspherical microlens increases coupling efficiency. 3. Experiment and results3.1.