Enhancement of butt-coupling pump efficiency in a new Nd-doped large core double clad fiber laser cavity adiabatically tapered at both ends

Author

Jeong, H. ; Oh, K. ; Seo, H.S. ; Choi, S. ; Shin, W.

Author_Institution

Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., South Korea

fYear

2001

fDate

11-11 May 2001

Firstpage

320

Lastpage

321

Abstract

Summary form only given. A new clad pumped fiber laser cavity structure has been proposed and experimentally demonstrated. Double adiabatic tapers included in the cavity provided inherent highly mode-selective attenuation to the lasing photons guided through the core with an improved butt-coupling efficiency for the pump light. Filtering of high order modes at the lasing wavelength was confirmed by measurement of the far-field pattern of the laser output. Output power 820 mW was achieved for the coupled pump power of 5.8 W which could be further improved by reduction of helical waves in pump light.

Keywords

Fabry-Perot resonators; fibre lasers; laser cavity resonators; laser modes; neodymium; optical fibre cladding; optical fibre couplers; 820 mW; Fabry-Perot laser cavity; Nd-doped fiber laser; adiabatically tapered cavity; butt-coupling pump efficiency; double adiabatic tapers; fiber laser cavity; large core double clad laser; mode-selective attenuation; multimode active core; single mode output; Erbium-doped fiber lasers; Fiber lasers; Laser excitation; Laser feedback; Laser mode locking; Optical fiber polarization; Optical fibers; Power lasers; Pump lasers; Semiconductor laser arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-662-1

Type

conf

DOI

10.1109/CLEO.2001.947860

Filename

947860