Fiber laser coherent array for power scaling of single-mode fiber laser

Akira Shirakawa; Keigo Matsuo; Ken-ichi Ueda

doi:10.1117/12.596366

8 October 2004 Fiber laser coherent array for power scaling of single-mode fiber laser

Akira Shirakawa, Keigo Matsuo, Ken-ichi Ueda

Proceedings Volume 5662, Fifth International Symposium on Laser Precision Microfabrication; (2004) https://doi.org/10.1117/12.596366
Event: Fifth International Symposium on Laser Precision Microfabrication, 2004, Nara, Japan

Abstract

Coherent beam combining of many fiber lasers by the Y-shaped complex resonator method realizes both power scaling and spectral narrowing. The basic characteristics of this Y-shaped coherent array, scalability of power summation, and bandwidth narrowing property are presented. As high as 85% addition efficiency with only a few longitudinal-modes was obtained in an array of eight 10-nm bandwidth lasers coupled by fused fiber couplers. By threshold control of the constructive-interference supermodes, high-speed (>1 kHz), high-contrast-ratio (>100) coherent control of beam direction has also been demonstrated. Mass-free and reaction-free properties can realize high-speed laser-beam scanning, which will be quite useful in many applications such as material processing and space communications.

Citation Download Citation

Akira Shirakawa, Keigo Matsuo, and Ken-ichi Ueda "Fiber laser coherent array for power scaling of single-mode fiber laser", Proc. SPIE 5662, Fifth International Symposium on Laser Precision Microfabrication, (8 October 2004); https://doi.org/10.1117/12.596366

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available