Park, Jae Seok Jeong, Myung Yung Jung, Chang-Hyun Ouh, Chi-Hwan Kang, Hee-Jeon Han, Young-Geun Lee, Sang Bae Kim, Chang-Seok 2024-01-20T19:02:17Z 2024-01-20T19:02:17Z 2021-09-02 2010-07 1077-260X https://pubs.kist.re.kr/handle/201004/131302 In the application of optical imaging technologies to the biomedical field, the flexible optical cord is one of the key components used to deliver the reflected optical signal from the internal biological tissue to the biomedical imaging system. However, the conventional optical fibers suffer from a critical wiring limitation, which results in severe power losses under a small bending radius that is less than a few centimeters. In this paper, we demonstrate that holey optical fibers with 18 air holes in cladding have negligible bending loss under a minimum bending radius of 3 mm. Excellent bending insensitivity of the holey fibers can effectively reduce the device size and space, which will be highly beneficial to the flexible endoscopic common-path optical coherence tomography system. A curled optical cord, similar to a curled telephone cord, is specially designed and fabricated to accommodate access of the imaging probe to the biological target at flexible distances. The curled optical cord displays excellent optical properties of a much lower bending loss and better optical imaging quality, but the attenuation and insertion losses are still the same as that of a conventional single-mode fiber-based optical cord. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PHOTONIC CRYSTAL FIBER SINGLE-MODE FIBERS COHERENCE TOMOGRAPHY HOLEY FIBERS INTERFEROMETER SENSITIVITY Flexible Curled Optical Cord for Bending-Insensitive Optical Imaging Delivery Article 10.1109/JSTQE.2009.2033211 1 IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, v.16, no.4, pp.1031 - 1038 IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 16 4 1031 1038 scie scopus 000283541100038 2-s2.0-77955513667 Engineering, Electrical & Electronic Quantum Science & Technology Optics Physics, Applied Engineering Physics Optics Article PHOTONIC CRYSTAL FIBER SINGLE-MODE FIBERS COHERENCE TOMOGRAPHY HOLEY FIBERS INTERFEROMETER SENSITIVITY Biomedical optical imaging optical coherence tomography (OCT) optical fiber fabrication