The Study of Ultra-Fast Ultra-Broadband Laser Module Employing Graphene Chromium-Doped Fiber for Artificial Intelligent of Biomedical Imaging Application

Publication Date: 2019-12-23

Execution Methods	This project has developed an all-fiber swept source optical coherence tomography (SS-OCT), which has a 5-μm high-resolution, a scan rate of 1-MHz, and a system sensitivity of 40-dB. The SS-OCT equipped with an AI identification system, which is an important tool in biological research and clinical. The SS-OCT's light source in this project is a femtosecond-level chromium-doped fiber mode-locked laser (CDFL). The CDFL is further matched with a dispersion compensation fiber to complete an ultra-broadband chromium-doped sweep-frequency laser light source. Combined with a fast two-dimensional solid-state scanning chip, a non-intrusive high-resolution fiber-optic SS-OCT module has been developed, which has become an important tool in biological research and clinical research. Finally, an AI recognition system developed on the plug-in can be identified for detecting animal skin. The accuracy rate is above 85%.
Performance Evaluation	SCI Journal paper： Z. Tian, L.Q. Zhang, H.M. Zhou, D. Yan, C.K. Yao, N.K. Chen, S.K. Liaw, C.N. Liu, H.S. Yu, and M. Zhao, “Tm3+-Doped Harmonic Dissipative Soliton Mode-Locked Fiber Laser at 1.93 μm Based on Tungsten Disulfide in Anomalous Dispersion Regime,” IEEE Access, Vol. 7, pp. 170185-170191, Nov. 2019. (IF=4.098, Rank 12%) C.N. Liu, J.W. Li, Y.H. Tung, C.C. Yang, W.C. Cheng, S.L. Huang, and W.H. Cheng, “Enhancement of Tetrahedral Chromium (Cr4+) Concentration For High-Gain in Single-Mode Crystalline Core Fibers,” IEEE Photonics Journal, Nov. 2019. (Accepted) C.N. Liu, H.Y. Su, K.S. Hsiao, N.K. Chen, C.Y. Yeh, S.L. Huang, and W.H. Cheng, "New Scheme of Mode-Locked Cr-Doped Fiber Laser Employing Reduced Graphene Oxide," J. Lightw. Technol., Nov. 2019. (Under Review). Conference paper： C.M. Liu, J.W. Li, C.N. Liu, W.C. Cheng, Charles Tu, T.T. Shih, S.L. Huang, and W.H. Cheng, “Tetrahedral-Cr Enhancement Employing Dielectric Coating for Higher Gain of Broadband Cr-Doped Fiber Amplifiers,” OFC Conference, San Diego, CA, USA, Mar. 8-12, 2020. Y.H. Chen, C.N. Liu, K.S. Hsiao, C.Y. Yeh, and W.H. Cheng, "Fabrication and Performance of Mode-Locked Cr-Doped Fiber Laser Employing Graphene Saturable Absorber," OPTIC conference, Taichung, Taiwan, 5-7 Dec. 2019. H.Y. Su, C.N. Liu, N.K. Chen, Charles Tu, W.H. Cheng, "New Scheme of Mode-Locked Laser by Broadband Cr-Doped Fiber and Graphene," OECC/PSC conference, 19009763, Fukuoka, Japan, 7-11 Jul. 2019.
Conclusion & Suggestion	The implementation of the plan has been completed: (1) femtosecond chrome-doped fiber mode-locked laser, with laser characteristics such as 118-fs pulse width, 32-nm pulse bandwidth, 15.9-MHz repetition rate and 295-mW average output power . (2) All-fiber swept-source optical coherence tomography (SS-OCT), which has a 3-μm high-resolution image resolution, a scan rate of 1-MHz, and a system sensitivity of 40-dB. (3) AI recognition system, the recognition accuracy of detecting animal skin group is more than 85%. (4) Prof. Chun-Nien Liu visited the Prof. Fainman laboratory at the UCSD from September to November 2019 for an academic visit. (5) The technology has been successfully obtained NTD. 830,000 funding. (6) Two journal papers and Three international conference papers. In the future, we will continue to apply for research on chrome-doped fiber mode-locked lasers and fast two-dimensional solid-state scanning wafer components, and strive for more research funding. Chromium-doped optical fiber mode-locked lasers can be implemented and developed from the aspect of laser processing; fast two-dimensional solid-state scanning wafers can be implemented and developed from the aspect of optical phase control of lasers, and apply for industry-academic programs respectively.
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