Pump light leakage at coupler of side-pumped double-clad fiber laser with a novel dielectric-metal-dielectric sandwich structure

zhang fan; wang chun-can; ning ti-gang; gen rui; jian shui-sheng

Volume 19 Issue 04

Apr. 2007

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Article Navigation > High Power Laser and Particle Beams > 2007 > 19(04): 0-

zhang wei, wu jian-hong, li chao-ming. Effect of wavefront aberration of grating on pulse compression[J]. High Power Laser and Particle Beams, 2005, 17.

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zhang fan, wang chun-can, ning ti-gang, et al. Pump light leakage at coupler of side-pumped double-clad fiber laser with a novel dielectric-metal-dielectric sandwich structure[J]. High Power Laser and Particle Beams, 2007, 19.

zhang wei, wu jian-hong, li chao-ming. Effect of wavefront aberration of grating on pulse compression[J]. High Power Laser and Particle Beams, 2005, 17.

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Pump light leakage at coupler of side-pumped double-clad fiber laser with a novel dielectric-metal-dielectric sandwich structure

1.
Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University,Beijing 100044,China;
2.
Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China

Publish Date: 2007-04-15

Abstract

Abstract

A multi-coupler side-pumped rare-earth-doped double-clad fiber laser with a novel dielectric-metal-dielectric(DMD) sandwich structure based on the theory of sub-wavelength diffraction grating is presented. A rigorous electromagnetic theory which considers the vectorial character of the light has been used to investigate and compute its pump light leakage at adjacent coupler for every coupled structure and it is found that pump light leakage is only 15.52% with a angle perpendicular to side of fiber. So this DMD sandwich structure can be applied to multi-point side-pump double-clad fiber laser effectively and the maximum coupling efficiency is greater than 80% after the second diffraction.
- fiber laser,
- double-clad fiber,
- metal diffraction grating,
- coupling efficiency,
- leakage

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