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Robust 1.7-μm, all-polarization-maintaining femtosecond fiber laser source based on standard telecom fibers
摘要： We demonstrate a compact 1.7-μm all-polarization-maintaining (PM) ultrafast fiber laser source, which employs soliton self-frequency shift (SSFS) in an optical fiber as the dominant spectral-shifting mechanism. The laser generates stable pulses with 384 fs pulse width and 102 MHz repetition rate centered at 1.7 μm with 7 nm spectral bandwidth. The average power is about 35 mW with a high conversion efficiency of 66 %. The measured root mean square (RMS) output power stability over 10 hours is as low as 0.22 %. Both experimental and simulation results demonstrate that this laser has a potential to improving multiphoton imaging depth.
关键词： all-polarization-maintaining,multiphoton imaging,femtosecond fiber laser,soliton self-frequency shift,1.7-μm
更新于2025-11-28 14:23:57
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Advanced multimodal laser imaging tool for urothelial carcinoma diagnosis (AMPLITUDE)
摘要： The paper presents an overview and concept of the European Union Horizon 2020 project “AMPLITUDE - Advanced Multimodal Photonics Laser Imaging Tool for Urothelial Diagnosis in Endoscopy”. The project aims at the development of a novel label-free, multi-modal imaging tool for urothelial cancer diagnosis and therapy monitoring based on ultrafast fiber laser operating in the 3rd biological window with frequency doubling and additional 785 nm CW laser for Raman spectroscopy. The tool corresponds to clinical needs for better diagnosis of the pathohistological staging of tumours and in-vivo endoscopic assessment of depth of lesion invasiveness.
关键词： 3rd biological window,multiphoton imaging,bladder cancer,confocal microscopy,short-pulsed laser
更新于2025-09-19 17:13:59