| Department | 自适应光学技术研究室（八室） |
| Control Bandwidth Promotion of Adaptive Fiber-Optics Collimator and Its Application in Coherent Beam Combination | |
| Huang, Guan1,2,3; Geng, Chao1,2; Li, Feng1,2; Liu, Jiaying1,2,3; Li, Xinyang1,2 | |
| Source Publication | IEEE PHOTONICS JOURNAL
 |
| Volume | 10Issue:6Pages:7105513 |
| 2018-12-01 | |
| Language | 英语 |
| ISSN | 1943-0655 |
| DOI | 10.1109/JPHOT.2018.2876136 |
| Indexed By | SCI ; Ei |
| WOS ID | WOS:000449084900001 |
| EI Accession Number | 20184406021791 |
| Subtype | J |
| Abstract | Adaptive fiber-optics collimator (AFOC) plays an important role in the coherent beam combining (CBC) systems. To improve the control bandwidth, the frequency characteristics of AFOC are measured, and an accurate transfer function model is established. Through the analysis of this model, we find that the resonance and the inherent response delay are the main limiting factors. To solve these two problems, an active resonance suppression method based on biquad filters and an improved control algorithm named precise-delayed stochastic parallel gradient descent (PD-SPGD) is proposed. The resonance suppression experiment shows that when the frequency is within 10 kHz, the fluctuation in the AFOC's amplitude-frequency characteristic is suppressed within +/- 3 dB by the biquad filters, and the phase-frequency characteristic is compensated to be similar to a pure delay element (with inherent response delay of about 88 mu s). The two-channel CBC experiment shows that the algorithm's iteration rate increased from 1.6 to 6 kHz and the convergence time decreased from 5.63 to 1.83 ms when the biquad filters and PD-SPGD are used together, which indicate that the AFOC's actual control bandwidth is about 3.1 times higher than before. |
| Keyword | Coherent beam combining adaptive fiber-optics collimator biquad filters precise-delayed SPGD algorithm |
| WOS Keyword | MIRROR ; TILT ; TIP |
| EI Keywords | Adaptive optics ; Bandwidth ; Fiber amplifiers ; Fiber optics ; Gradient methods ; Laser beams ; Natural frequencies ; Optical fibers ; Stochastic systems |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ioe.ac.cn/handle/181551/9284 |
| Collection | 自适应光学技术研究室（八室） |
| Affiliation | 1.Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu; 610209, China; 2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; 3.University of Chinese Academy of Sciences, Beijing; 100049, China |
| Recommended Citation GB/T 7714 | Huang, Guan,Geng, Chao,Li, Feng,et al. Control Bandwidth Promotion of Adaptive Fiber-Optics Collimator and Its Application in Coherent Beam Combination[J]. IEEE PHOTONICS JOURNAL,2018,10(6):7105513. |
| APA | Huang, Guan,Geng, Chao,Li, Feng,Liu, Jiaying,&Li, Xinyang.(2018).Control Bandwidth Promotion of Adaptive Fiber-Optics Collimator and Its Application in Coherent Beam Combination.IEEE PHOTONICS JOURNAL,10(6),7105513. |
| MLA | Huang, Guan,et al."Control Bandwidth Promotion of Adaptive Fiber-Optics Collimator and Its Application in Coherent Beam Combination".IEEE PHOTONICS JOURNAL 10.6(2018):7105513. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2018-2051.pdf（3016KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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