Open AccessSingle Mode Laser Oscillation in an Nd‐Doped Large Core Double Clad Fiber Cavity with Concatenated Adiabatic Tapers
Author(s) -
Seo gSeok,
Choi Yong Gyu,
Kim Kyung Hon,
Jeong Hoon,
Oh Kyunghwan
Publication year - 2002
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.02.0202.0303
Subject(s) - materials science , fiber laser , adiabatic process , core (optical fiber) , oscillation (cell signaling) , laser , lasing threshold , optics , slope efficiency , optoelectronics , wavelength , physics , composite material , genetics , biology , thermodynamics
We created a new design for an Nd‐doped clad‐pumped silica fiber laser to enhance the pump absorption and lasing efficiency for a butt‐coupled, end‐pumped scheme. Two concatenated adiabatic tapers formed within the laser cavity simultaneously removed higher order modes and were spliced to conventional single mode fibers. We theoretically analyzed mode propagation along the composite cavity and experimentally achieved continuous wave oscillation in the LP 01 mode at 1.06 µm and a laser output power of over 820 mW with a slope efficiency of 27%.