Analysis of W-type waveguide for Nd-doped fiber laser operating near 940 nm
✍ Scribed by Seongwoo Yoo; Daniel B.S. Soh; J. Kim; Y. Jung; J. Nilsson; J.K. Sahu; Jhang W. Lee; K. Oh
- Book ID
- 104072915
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 384 KB
- Volume
- 247
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
We propose a three-layered W-type structure for laser fiber to facilitate the three-level radiative transition near 940 nm region of Nd ion, while suppressing the competing four-level transition near 1060 nm by introducing a novel highly wavelength selective loss mechanism. In order to achieve a net gain around 940 nm, requirements in fiber waveguide parameters for the LP 01 mode cut-off and bending loss were theoretically investigated. The waveguide designs were experimentally confirmed generating stable CW single mode output power of 705 mW.