|
|
|
An autobias control system for the electro–optic modulator used in a quantum key distribution system |
| Chen Wen-Fen (陈文芬), Wei Zheng-Jun (魏正军), Guo Li (郭莉), Hou Li-Yan (侯丽燕), Wang Geng (王赓), Wang Jin-Dong (王金东), Zhang Zhi-Ming (张智明), Guo Jian-Ping (郭建平), Liu Song-Hao (刘颂豪) |
| Laboratory of Nanophotonic Functional Materials and Devices (SIPSE) and Laboratory of QuantumEngineering and Quantum Materials, South China Normal University, Guangzhou 510006, China |
|
|
|
|
Abstract In a quantum key distribution system, it is crucial to keep the extinction ratio of the coherent pulses stable. This means that the direct current bias point of the electro-optic modulator (EOM) used for generating coherent pulses must be locked. In this paper, an autobias control system based on a lock-in-amplifier for the EOM is introduced. Its drift information extracting theory and control method are analyzed comprehensively. The long term drift of the extinction ratio of the coherent pulses is measured by a single photon detector, which indicates that the autobias control system is effective for stabilizing the bias point of the EOM.
|
Received: 14 September 2013
Revised: 25 February 2014
Accepted manuscript online:
|
|
PACS:
|
03.67.Dd
|
(Quantum cryptography and communication security)
|
| |
42.79.Hp
|
(Optical processors, correlators, and modulators)
|
| |
07.05.Dz
|
(Control systems)
|
|
| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61108039), the Major Research Plan of the National Natural Science Foundation of China (Grant No. 91121023), and the Scientific Research Foundation of Graduate School of South China Normal University (Grant No. 2012kyjj224). |
Corresponding Authors:
Wei Zheng-Jun
E-mail: weizjweizj@126.com
|
Cite this article:
Chen Wen-Fen (陈文芬), Wei Zheng-Jun (魏正军), Guo Li (郭莉), Hou Li-Yan (侯丽燕), Wang Geng (王赓), Wang Jin-Dong (王金东), Zhang Zhi-Ming (张智明), Guo Jian-Ping (郭建平), Liu Song-Hao (刘颂豪) An autobias control system for the electro–optic modulator used in a quantum key distribution system 2014 Chin. Phys. B 23 080304
|
| [1] |
Bennett C H and Brassard G 1984 Proceedings of the IEEE International Conference on Computers, Systems, and Signal Processing, December 9-12, 1984, Bangalore, India, p. 175
|
| [2] |
Bennett C H 1992 Phys. Rev. Lett. 68 3121
|
| [3] |
Inoue K, Waks E and Yamamoto Y 2003 Phys. Rev. A 68 022317
|
| [4] |
Takesue H, Diamanti E, Honjo T, Langrock C, Fejer M M, Inoue K and Yamamoto Y 2005 New J. Phys. 7 232
|
| [5] |
Zhou Y Y, Zhou X J, Tian P G and Wang Y J 2013 Chin. Phys. B 22 010305
|
| [6] |
Zhang Y, Wang S, Yin Z Q, Chen W, Liang W Y, Li H W, Guo G C and Han Z F 2012 Chin. Phys. B 21 100307
|
| [7] |
Wang J D, Qin X J, Wei Z J, Liu X B, Liao C J and Liu S H 2010 Acta Phys. Sin. 59 281 (in Chinese)
|
| [8] |
Takesue H, Honjo T, Tamaki K and Tokura Y 2009 IEEE Commun. Mag. 47 102
|
| [9] |
Inoue K, Ohashi T, Kukita T, Watanabe K, Hayashi S, Honjo T and Takesue H 2008 Opt. Express 16 15469
|
| [10] |
Salvestrini J P, Guilbert L, Fontana M, Abarkan M and Gille S 2011 J. Lightwave Technol. 29 1522
|
| [11] |
Bui D T, Nguyen L D, Ledoux-Rak I and Journet B 2010 Optical Components and Materials VI, January 26-28, 2010, San Francisco, UAS, p. 75980R
|
| [12] |
Nicolas G, Gregoire R, Wolfgang T and Hugo Z 2002 Rev. Mod. Phys. 74 145
|
| [13] |
Bui D T, Pham T T, Vu V Y and Journet B 2012 m4th International Conference on Communications and Electronics (ICCE), August 1-3, 2012, Hue, Vietnam, p. 63
|
| [14] |
Bui D T, Nguyen C T, Ledoux-Rak I, Zyss J and Journet B 2011 Meas. Sci. Technol. 22 125105
|
| [15] |
Huang Z J, Zhang X M, Zheng S L, Jin X F and Chi H 2011 2011 IEEE International Topical Meeting on Microwave Photonics, October 18-21, 2011, Singapore, Singapore, p. 218
|
| [16] |
Snoddy J, Li Y, Ravet F and Bao X Y 2007 Appl. Opt. 46 1482
|
| [17] |
Wada Y, Taketomi A, Inoue T, Hashimo M, Kamba Y, Matsuura J, Tei K, Yamaguchi S, Enokidani J and Sumida S 2011 2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim, August 28-September 1, 2011, Sydney, Australia, p. 1730
|
| [18] |
Chen Y N, Zhang X Q and Li D 2009 9th International Conference on Electronic Measurement & Instruments (ICEMI 2009), August 16-19, 2009, Beijing, China, pp. 3-950
|
| [19] |
Gao J Z 2004 Detection of Weak Signals (Beijing: Tsinghua University Press) p. 154 (in Chinese)
|
| [20] |
Inoue K and Honjo T 2005 Phys. Rev. A 71 042305
|
| [21] |
Ma L, Nam S, Xu H, Baek B, Chang T, Slattery O, Mink A and Tang X 2009 New J. Phys. 11 045020
|
| [22] |
Oppenheim A V, Willskey A S and Nawmid S 1999 Signals & Systems, 2nd edn. (Beijing: Tsinghua University Press) p. 202 (in Chinese)
|
| [23] |
Wang Z, Hong J, Qiao Y L, Wang F and Yang W F 2007 Optical Technique 33 196 (in Chinese)
|
| [24] |
Liu J F, Liang R S, Liu W P, Tang Z L, Zheng L M, Wei Z J, Chen Z X, Liao C J and Liu S H 2004 Acta Photonica Sin. 33 867 (in Chinese)
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
