Title :
Efficient low-threshold lasers based on an erbium-doped holey fiber
Author :
Furusawa, K. ; Kogure, T. ; Sahu, J.K. ; Lee, J.H. ; Monro, T.M. ; Richardson, D.J.
Author_Institution :
Optoelectronics Res. Centre, Univ. of Southampton, Highfield, UK
Abstract :
We report experimental results on the continuous-wave lasers based on a small core erbium-doped holey fiber. In a simple Fabry-Perot-type cavity with high output coupling, we demonstrate low-threshold (0.55 mw) high slope-efficiency (57.3%) operation confirming both the quality and exceptionally high gain efficiency of the fiber. In an all-fiber ring cavity where the cavity loss is reduced, we show that it is possible to achieve a low-threshold laser with extremely wide tunability (>100 nm around 1550 nm). Our results illustrate some of the unique opportunities provided by active small core holey fibers.
Keywords :
Fabry-Perot resonators; erbium; fibre lasers; laser cavity resonators; laser tuning; optical fibre fabrication; optical fibre losses; photonic crystals; 0.55 mW; 1550 nm; Fabry-Perot type cavity; all-fiber ring cavity; cavity loss; continuous-wave lasers; erbium-doped holey fiber; fiber laser; high output coupling; high slope-efficiency operation; laser tuning; low-threshold lasers; optical fiber fabrication; photonic crystal fiber; small core holey fibers; Erbium-doped fiber lasers; Glass; Hafnium; Holey fibers; Laser modes; Laser tuning; Optical fibers; Pump lasers; Ring lasers; Waveguide lasers; Fiber laser; holey optical fiber; laser tuning; microstructured optical fiber; optical fiber fabrication; photonic crystal fiber; rare-earth doped fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.837260
