Share Email Print
cover

Proceedings Paper

Coherent beam combining of collimated fiber array based on target-in-the-loop technique
Author(s): Xinyang Li; Chao Geng; Xiaojun Zhang; Changhui Rao
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Coherent beam combining (CBC) of fiber array is a promising way to generate high power and high quality laser beams. Target-in-the-loop (TIL) technique might be an effective way to ensure atmosphere propagation compensation without wavefront sensors. In this paper, we present very recent research work about CBC of collimated fiber array using TIL technique at the Key Lab on Adaptive Optics (KLAO), CAS. A novel Adaptive Fiber Optics Collimator (AFOC) composed of phase-locking module and tip/tilt control module was developed. CBC experimental setup of three-element fiber array was established. Feedback control is realized using stochastic parallel gradient descent (SPGD) algorithm. The CBC based on TIL with piston and tip/tilt correction simultaneously is demonstrated. And the beam pointing to locate or sweep position of combined spot on target was achieved through TIL technique too. The goal of our work is achieve multi-element CBC for long-distance transmission in atmosphere.

Paper Details

Date Published: 12 October 2011
PDF: 7 pages
Proc. SPIE 8178, Optics in Atmospheric Propagation and Adaptive Systems XIV, 81780M (12 October 2011); doi: 10.1117/12.897153
Show Author Affiliations
Xinyang Li, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Chao Geng, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Xiaojun Zhang, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)
Changhui Rao, Institute of Optics and Electronics (China)
Key Lab. on Adaptive Optics (China)


Published in SPIE Proceedings Vol. 8178:
Optics in Atmospheric Propagation and Adaptive Systems XIV
Karin Stein; John D. Gonglewski, Editor(s)

© SPIE. Terms of Use
Back to Top