All-fiber mode-locked pulse fiber laser and super-continuum generation

Feng Yu; Tingwu Ge; Jing jing Dai; Wenqi Zhang; Pu Wang; Zhiyong Wang

doi:10.1117/12.899378

19 August 2011 All-fiber mode-locked pulse fiber laser and super-continuum generation

Feng Yu, Tingwu Ge, Jing jing Dai, Wenqi Zhang, Pu Wang, Zhiyong Wang

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81920U (2011) https://doi.org/10.1117/12.899378
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Super-continuum(SC) is widely used in coherent photography technology, optical spectroscopy analysis, interferometry, etc because of its flat and broad high spatial coherence and high power. Super-continuum generation could be realized on theory by ultra-short pulse laser getting through the high nonlinear medium, accompany with self-phase modulation (SPM), stimulated Raman scattering (SRS), four-wave mixing (FWM). With the development of fiber technology, Yb-doped ultra-short pulse fiber laser, which has high peak power, high optic-to-optic efficiency, compact structure and small volume was elected as the pump source, and high nonlinear photonic crystal fiber (PCF) as the nonlinear medium for SC. In this paper, steady and self-starting mode-locked pulse ring cavity fiber laser based on the nonlinear polarization rotated effect as seed source is obtained. Taking Yb-doped double-cladding fiber as the gain medium, through MOPA structure, the 80mW signal was amplified to 3.1W, with 1064nm wavelength, 41.3MHz repetition frequency and 50ps impulse duration; the amplified mode-locked pulse was coupled into a 10m PCF, with 1040nm zero dispersion point, to generate 1.5W super-continuum by fusing method, during which the key parameters like discharge time, discharge interval, loss are seriously optimized to keep the fusing quality well. The whole system is all fiber structure, which is much higher than conventional free-space coupling way in both conversion efficiency and stability.

Citation Download Citation

Feng Yu, Tingwu Ge, Jing jing Dai, Wenqi Zhang, Pu Wang, and Zhiyong Wang "All-fiber mode-locked pulse fiber laser and super-continuum generation", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81920U (19 August 2011); https://doi.org/10.1117/12.899378

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KEYWORDS

Mode locking

Fiber lasers

Structured optical fibers

Pulsed laser operation

Ytterbium

Nonlinear optics

Scanning probe microscopy

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