Optimum design of the phase control system of coherent beam combining of fiber amplifiers

Xiaomeng Zhao; Xiaojun Xu; Pu Zhou; Jing Hou; Jinbao Chen

doi:10.1117/12.757193

6 February 2008 Optimum design of the phase control system of coherent beam combining of fiber amplifiers

Xiaomeng Zhao, Xiaojun Xu, Pu Zhou, Jing Hou, Jinbao Chen

Proceedings Volume 6823, High-Power Lasers and Applications IV; 68231A (2008) https://doi.org/10.1117/12.757193
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Combining fiber laser beams are of current interest for scaling lasers to high average output power. The Master Oscillator Power Amplifier (MOPA) configuration is important in fiber laser beam combination. The efficiency of coherent beam combining is depended on the phase control precision of the system mostly, which is equivalent to the closed loop output phase noise. In this paper, a simplified negative feedback model of the phase control system is constructed to study the optimum design of the system. The effects of the transfer function of the system on the phase noise of the optical fiber amplifier, the measured noise and the stability of the system are analyzed. The relationship between the closed loop output noise and the system parameters is analyzed and calculated. The results show that there is a set of system parameters to minimize the closed loop output noise for different phase noise of the optical fiber amplifier, and for a fixed set of system parameters, the closed loop output noise of the system almost changes linearly with the change of the input noise. The effective means to achieve optimal system parameters for higher degree of control precision are obtained.

Citation Download Citation

Xiaomeng Zhao, Xiaojun Xu, Pu Zhou, Jing Hou, and Jinbao Chen "Optimum design of the phase control system of coherent beam combining of fiber amplifiers", Proc. SPIE 6823, High-Power Lasers and Applications IV, 68231A (6 February 2008); https://doi.org/10.1117/12.757193

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