학술논문
kHz Closed Loop Interferometric Technique for Coherent Fiber Beam Combining
Document Type
Periodical
Author
Source
IEEE Journal of Selected Topics in Quantum Electronics IEEE J. Select. Topics Quantum Electron. Selected Topics in Quantum Electronics, IEEE Journal of. 20(5):182-187 Jan, 2014
Subject
Language
ISSN
1077-260X
1558-4542
1558-4542
Abstract
An architecture for large bandwidth active coherent fiber beam combining using interferometric measurement is demonstrated. The phases of all the fibers are extracted from a single image recorded on a high speed camera. To the best of our knowledge, this is the first time that the kHz regime is achieved with this technique. Our system, composed of 16 independent fiber channels, is used to evaluate the phase locking stability achieved with this technique. We also show that a minimum of 8 pixels per fiber on the camera is required for a stable close loop operation with a residual phase error of λ/20 rms, which demonstrates the scalability of this concept.