基于光电振荡器的宽带射频下转换及在高清视频传输的应用

以无压缩全高清视频的光载无线传输为背景, 通过研究宽带射频光子下转换技术, 从而构建全高清视频的实时传输系统, 其中下转换系统主要基于光电振荡器实现.由于光电振荡器的注入锁定, 光微波信号中的载波信号被提取出来, 并反馈至调制器, 与宽带光微波信号混频, 在光域实现信号下转换.实验论证了载频为10 GHz, 码率大于2 Gb/s的信号下转换和有线无线传输.利用天线和光纤实现了距离为0.5 m的无线分发和距离为10 km的有线传输.本文还成功实现了1.5 Gb/s无压缩高清视频信号的实时传输.实验结果表明, 该系统具有大带宽、抗电磁干扰等优点, 同时利用光电振荡器的自动相位跟踪技术, 无须外加锁相等操作.整个下转换系统简单稳定, 为高清视频的有线无线传输提供了论证和演示平台.

Abstract

Wideband photonic microwave downconversion based on an optoelectronic oscillator (OEO) is proposed and demonstrated for the uncompressed HD video radio-over-fiber (RoF) transmission system. By using the injection locking of the OEO, high-quality RF carrier is extracted from the optical microwave signal. The extracted RF carrier is then fed back to the modulator to perform the downconversion in the optical domain. An experiment is performed. The distribution and downconversion of the signal with a carrier frequency of 10 GHz and a data rate of ≥2 Gb/s is verified. The wireless distance is 0.5 m and the length of optical fiber is 10 km. The distribution of a real-time 1.5-Gb/s uncompressed HD video is also demonstrated in the radio over fiber link. The results show that the system features wide bandwidth and low electromagnetic interference. Meanwhile, thanks to the automaic phase tracking of the OEO, no additional phase-locking operation is needed. The overall system is simple and stable, which provides a presentation and demonstration platform for HD video transmission.

参考文献

[1] CISCO INC. Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update, 2011–2016［EB/OL］. Feb. 2012. http://www.cisco.com/en/US/solutions/collateral/ns341/ns525/ns537/ns705/ns827/white_paper_c11-520862.html.

[2] USAMI M. Strategy for KDDI's next generation network［C］. International Conference on Transparent Optical Networks (ICTON 2008), 2008, 186-189.

[3] BELBEKKOUCHE A, REZGUI J, HAFID A. Wireless mesh and optical burst switching convergence for a novel metropolitan area network architecture［J］. Computer Networks, 2011, 55(1): 159-172.

[4] PAN S L, YAO J P. UWB over fiber communications: modulation and transmission［J］. Journal of Lightwave Technology, 2010, 28(16): 2445-2455.

[5] 徐坤, 殷杰, 李建强. 超宽带光载无线系统及其关键技术［J］.中兴通讯技术, 2009, 15(3): 21-24.

XU Kun, YIN Jie, LI Jian-qiang. Super wideband radio over fiber system and the research of key technologies［J］. ZTE Communication, 2009, 15(3): 21-24.

[6] 王晓云, 黄宇红, 崔春风,等.C-RAN：面向绿色的未来无线接入网演进［J］.中国通信, 2010, 7(3)：107-112.

WANG Xiao-yun, HUANG Yu-hong, CUI Chun-feng, et al. C-RAN：evolution toward green radio access network［J］.China Communications, 2010, 7(3): 107-112.

[7] AL-RAWESHIDY H, KOMAKI S. Radio over fiber technologies for mobile communications networks［M］. Artech House Publishers, 2002.

[8] PAGAN V R, HASS B M, MURPHY T E. Linearized electrooptic microwave downconversion using phase modulation and optical filtering［J］. Optics Express, 2011, 19(2): 883-895.

[9] SONG H J, SONG J I. Simultaneous all-optical frequency downconversion technique utilizing an SOA-MZI for WDM radio over fiber (RoF) applications［J］. Journal of Lightwave Technology, 2006, 24(8): 3028-3034.

[10] YAO X S, MALEKI L. Optoelectronic microwave oscillator ［J］. JOSA B, 1996, 13(8): 1725-1735.

[11] SHIEH W, YAO S X, LUTES G, et al. Microwave signal mixing by using a fiber-based optoelectronic oscillator for wavelength-division multiplexed systems［C］. Conference on Optical Fiber Communication (OFC 97), 1997, 358-359.

[12] PAN S L, YAO J P. Optical clock recovery using a polarization-modulator-based frequency-doubling optoelectronic oscillator［J］. Journal of Lightwave Technology, 2009, 27(16): 3531-3539.

[13] HSUEH Y T, LIU C, FAN S H, et al. A novel full-duplex tested demonstration of converged all-band 60-GHz radio-over-fiber access architecture［C］. Conference on Optical Fiber Communication (OFC 2012), 2012, OTu2H.5.

[14] CHEN W E, LU T H, LIN C T, et al. Transmission distance improvement employing simple 60GHz radio-over-fiber system with beat noise mitigation［C］. Conference on Optical Fiber Communication (OFC 2012), 2012, OM2B.4.

唐震宙, 潘时龙, 周沛, 朱丹, 郭荣辉, 贲德. 基于光电振荡器的宽带射频下转换及在高清视频传输的应用[J]. 光子学报, 2012, 41(10): 1161. TANG Zhen-zhou, PAN Shi-long, ZHOU Pei, ZHU Dan, GUO Rong-hui, BEN De. Wideband Photonic Microwave Downconversion Based on an Optoelectronic Oscillator for Uncompressed HD Video Distribution[J]. ACTA PHOTONICA SINICA, 2012, 41(10): 1161.

基于光电振荡器的宽带射频下转换及在高清视频传输的应用

关于本站 Cookie 的使用提示

全站搜索

基于光电振荡器的宽带射频下转换及在高清视频传输的应用

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索