Axicon lens on optical fiber forming optical tweezers, made by focused ion beam milling

Cabrini, Stefano; Liberale, Carlo; Cojoc, D.; Carpentiero, Alessandro; Prasciolu, Mauro; Mora, S.; Degiorgio, Vittorio; Angelis, Francesco De; Fabrizio, E. Di

doi:10.1016/j.mee.2006.01.247

Cited by 93 publications

(64 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, most of the presented fabrication techniques are either time consuming [15] or expensive [16,17]. In particular, while chemical etching [15] and thermal processes [18] are low cost techniques, they are limited to conical and spherical designs, respectively.…”

Section: Open Accessmentioning

confidence: 99%

“…In particular, while chemical etching [15] and thermal processes [18] are low cost techniques, they are limited to conical and spherical designs, respectively. On the other hand, micro fabrication processes that use FIB milling [16] and femtosecond lasers [19], allow the fabrication of versatile structures, but have the drawback of being expensive and time consuming.…”

Section: Open Accessmentioning

confidence: 99%

See 1 more Smart Citation

Optical Fiber Tweezers Fabricated by Guided Wave Photo-Polymerization

et al. 2015

View full text Add to dashboard Cite

Abstract:In this work the use of guided wave photo-polymerization for the fabrication of novel polymeric micro tips for optical trapping is demonstrated. It is shown that the selective excitation of linear polarized modes, during the fabrication process, has a direct impact on the shape of the resulting micro structures. Tips are fabricated with modes LP02 and LP21 and their shapes and output intensity distribution are compared. The application of the micro structures as optical tweezers is demonstrated with the manipulation of yeast cells.

show abstract

Section: Open Accessmentioning

confidence: 99%

Section: Open Accessmentioning

confidence: 99%

Optical Fiber Tweezers Fabricated by Guided Wave Photo-Polymerization

et al. 2015

View full text Add to dashboard Cite

show abstract

“…8 An axicon lens was fabricated directly onto the end of a single-mode fiber (SMF) using focused ion beam (FIB) lithography to create a Bessel mode beam output for optical trapping. 44 A single-beam 3-D optical trap, with a trapping efficiency that was an order of magnitude less than that of the optical tweezers system, was designed by tapering a single-mode optical fiber using a heating and drawing method. 10 The trapping efficiency of 3-D optical fiber trapping systems was improved using an FIB milling machine to make incisions to the optical fiber core at its end-face, the result of which is that the output from either a four fiber bundle or a fiber with an annular core is redirected to a centralized focal spot.…”

Section: Optical Fiber Based Optical Trapping System Configurationsmentioning

confidence: 99%

Single-beam three-dimensional optical trapping at extremely low insertion angles via optical fiber optimization

et al. 2014

View full text Add to dashboard Cite

Abstract. Employing optical fiber to deliver the trapping laser to the sample chamber significantly reduces the size and costs of optical tweezers (OT). The utilization of fiber decouples the OT from the microscope, providing scope for system portability, and the potential for uncomplicated integration with other advanced microscopy systems. For use with an atomic force microscope, the fiber must be inserted at an angle of 10 deg to the plane of the sample chamber floor. However, the literature states that optical trapping with a single fiber inserted at an angle ≤20 deg is not possible. This paper investigates this limitation and proposes a hypothesis that explains it. Based on this explanation, a tapered-fiber optical tweezer system is developed. This system demonstrates that such traps can indeed be made to function in three-dimensions (3-D) at insertion angles of ≤10 deg using relatively low optical powers, provided the fiber taper is optimized. Three such optimized tapered fiber tips are presented, and their ability to optically trap both organic and inanimate material in 3-D is demonstrated. The near-horizontal insertion angle introduced a maximum trapping range (MTR). The MTR of the three tips is determined empirically, evaluated against simulated data, and found to be tunable through taper optimization.

show abstract

“…It allows a perfect irradiation of vein walls and their ablation. Among existent fiber processing methods such as chemical, FIB [3][4][5], mechanical polishing method is the best candidate to obtain such desired cone-angles. Furthermore, mechanical polishing process is applicable for mass-production of conical shaped optical fibers used in EVLA operation.…”

mentioning

confidence: 99%

“…These deflectors are especially used in endovenous laser ablation (EVLA) [2]. Unlike other cone-shaped fiber optical probes [3][4][5][6][7] used for various applications, EVLA operation needs μm-scale, multimode (MM) optical fibers and specific cone-angle values to fulfill the EVLA operation requirements. Thus, multi-mode, larger NA and μm-scale optical fibers are preferred in the operations.…”

mentioning

confidence: 99%

CO2 laser polishing of conical shaped optical fiber deflectors

2017

View full text Add to dashboard Cite

have been proposed and several types are currently used for tissue ablation. The types of deflector shapes are bare, sidefiring and radial. Bare fiber optic deflectors (basic deflector geometry) transmit the laser energy in the same direction along the fiber. Side-firing optical fiber optical deflectors transmit laser light perpendicular to the fiber axis through specific direction and they are widely used in many medical applications, especially in the prostate tumor ablation [1]. One of the most popular deflector types is radial design. Radial fiber optic deflectors with conically shaped optical fiber end transmit the laser energy radially and the laser energy is homogeneously distributed into a ring-shaped beam. These deflectors are especially used in endovenous laser ablation (EVLA) [2]. Unlike other cone-shaped fiber optical probes [3][4][5][6][7] used for various applications, EVLA operation needs μm-scale, multimode (MM) optical fibers and specific cone-angle values to fulfill the EVLA operation requirements. Thus, multi-mode, larger NA and μm-scale optical fibers are preferred in the operations. The homogeneous, ring-shaped laser energy distribution can be achieved with large cone angles which are detailed in this study. It allows a perfect irradiation of vein walls and their ablation. Among existent fiber processing methods such as chemical, FIB [3][4][5], mechanical polishing method is the best candidate to obtain such desired cone-angles. Furthermore, mechanical polishing process is applicable for mass-production of conical shaped optical fibers used in EVLA operation. In the mechanical polishing process, the deflector geometry is first formed with rough lapping film, then, the surface roughness of the deflector is gradually smoothed by polishing with smoother lapping films [8]. This process is composed of several steps to obtain high quality surface structures and a well-prepared fiber deflector surface eliminates the optical losses such as scattering and back reflection. However, the mechanical fining Abstract A novel method for polishing conical shaped optical fiber deflectors by modulated CO 2 laser exposure is reported. The conical shaped fiber deflector geometry was first formed with rough mechanical polishing, then it was exposed to modulated CO 2 laser operating with wavelength at 10.6 µm to achieve fine polish surfaces. The motivation of this work is to demonstrate that the modulated CO 2 laser exposure approach allows a fiber surface roughness at a nanometer scale without modifying the conical shape of the fiber deflector. The average surface roughness of mechanically polished fiber deflectors with 30 and 9 µm lapping films was smoothed down to 20.4 and 4.07 nm, respectively, after CO 2 laser polishing process. By combining mechanical and laser polishing techniques, fabrication of conical shaped optical fiber deflectors takes less time and it becomes laborer independent and easy to apply.

show abstract

Axicon lens on optical fiber forming optical tweezers, made by focused ion beam milling

Cited by 93 publications

References 8 publications

Optical Fiber Tweezers Fabricated by Guided Wave Photo-Polymerization

Optical Fiber Tweezers Fabricated by Guided Wave Photo-Polymerization

Single-beam three-dimensional optical trapping at extremely low insertion angles via optical fiber optimization

CO2 laser polishing of conical shaped optical fiber deflectors

Contact Info

Product

Resources

About