Radial-firing optical fiber tip containing conical-shaped air-pocket for biomedical applications.

We report a novel radial-firing optical fiber tip containing a conical-shaped air-pocket fabricated by deforming a hollow optical fiber using electric arc-discharge process. The hollow optical fiber was fusion spliced with a conventional optical fiber, simultaneously deforming into the intagliated conical-shaped region along the longitudinal fiber-axis of the fiber due to the gradual collapse of the cavity of the hollow optical fiber. Then the distal-end of the hollow optical fiber was sealed by the additional arc-discharge in order to obstruct the inflow of an external bio-substance or liquid to the inner air surface during the surgical operations, resulting in the formation of encased air-pocket in the silica glass fiber. Due to the total internal reflection of the laser beam at the conical-shaped air surface, the laser beam (λ = 632.8 nm) was deflected to the circumferential direction up to 87 degree with respect to the fiber-axis.

[1]  Ik-Bu Sohn,et al.  Femtosecond laser and arc discharge induced microstructuring on optical fiber tip for the multidirectional firing. , 2010, Optics express.

[2]  S. G. Bown,et al.  Phototherapy of tumors , 1983, World Journal of Surgery.

[3]  C. F. P. van Swol,et al.  Side-firing devices for laser prostatectomy , 2004, World Journal of Urology.

[4]  S. Jacques.  Optical properties of biological tissues: a review , 2013, Physics in medicine and biology.

[5]  Wei Jin,et al.  Fusion splicing small-core photonic crystal fibers and single-mode fibers by repeated arc discharges. , 2007, Optics letters.

[6]  Laurence J Walsh,et al.  Performance assessment of novel side firing flexible optical fibers for dental applications , 2009, Lasers in surgery and medicine.

[7]  Herwig Kogelnik,et al.  On the Propagation of Gaussian Beams of Light Through Lenslike Media Including those with a Loss or Gain Variation , 1965 .

[8]  Myung-Jin Jeon,et al.  Fabrication of novel bundled fiber and performance assessment for clinical applications , 2014, Lasers in surgery and medicine.

[9]  K. M. Tan,et al.  In-fiber common-path optical coherence tomography using a conical-tip fiber. , 2009, Optics express.

[10]  J C Mizeret,et al.  Cylindrical fiberoptic light diffuser for medical applications , 1996, Lasers in surgery and medicine.

[11]  R. Verdaasdonk,et al.  Laser light delivery systems for medical applications. , 1997, Physics in medicine and biology.

[12]  H. Lee,et al.  Comparison of laser‐induced damage with forward‐firing and diffusing optical fiber during laser‐assisted lipoplasty , 2013, Lasers in surgery and medicine.

[13]  Byeong Ha Lee,et al.  Single-body lensed photonic crystal fibers as side-viewing probes for optical imaging systems. , 2008, Optics letters.

[14]  J P Norris,et al.  Visual laser ablation of the prostate: clinical experience in 108 patients. , 1993, The Journal of urology.

[15]  Perry Ping Shum,et al.  Review of diverse optical fibers used in biomedical research and clinical practice. , 2014, Journal of biomedical optics.

[16]  Steven L. Jacques,et al.  Design and testing of an endoscopic photoacoustic probe for determination of treatment depth after photodynamic therapy , 2001, SPIE BiOS.

[17]  Zheng Wang,et al.  Fiber-optic technologies in laser-based therapeutics: threads for a cure. , 2010, Current pharmaceutical biotechnology.

[18]  R. Hibst,et al.  Comparison of different focusing fiber tips for improved oral diode laser surgery , 2012, Lasers in surgery and medicine.

[19]  J. Fujimoto,et al.  In vivo endoscopic optical biopsy with optical coherence tomography. , 1997, Science.

[20]  Jørgen Bru,et al.  Fiber optic probes for biomedical optical spectroscopy , 2008 .