一种提高基于循环频移器的多载波光源光信噪比的方案

刘娜; 席丽霞; 李建平; 张晓光; 田凤; 周浩

doi:10.7498/aps.61.174209

摘要

频率锁定多载波光源是实现太比特系统传输的关键器件之一, 目前已成为光纤通信领域的研究热点.基于循环频移技术产生的频率锁定多载波光源因具有驱动电压低、串扰小、平坦度高的优点而受到重视, 但是其输出质量容易受到调制器固有的高阶谐波串扰的影响,特别是三阶谐波串扰. 为了减小三阶串扰的影响,本文提出了在I/Q调制器两支路上再加载另一频率为3fm的射频信号的方案, 用其产生的一阶信号来抑制三阶串扰.通过理论分析与数值仿真,得到了载波数为24、载波间最大功率差小于0.1 dB的多载波光源输出.与未采用三阶串扰抑制方案的结果比较, 光源输出有效光信噪比提高了2 dB. 结果表明,采用本文的改进方案,可以有效地提高多载波光源的输出平坦度和有效光信噪比.

关键词:

Abstract

The output quality of frequency-locked multi-carrier source based on recirculating frequency shifter (RFS) technology is easily influenced by the inherent high-order harmonic crosstalk of modulator, especially the third-order crosstalk. In order to reduce the third-order crosstalk, a scheme that another RF signal whose frequency is 3fm is loaded on both ports of I/Q modulator is adopted. The first-order signal it produces is used to suppress the third-order crosstalk. A multi-carrier source whose number is 24 and maximal power difference is smaller than 0.1 dB is achieved through theoretical analysis and simulation research. The effective optical signal-to-noise ratio (OSNR) of multi-carrier source is improved by 2 dB compared with that before using the scheme of suppressing third-order crosstalk.

Keywords:

作者及机构信息

1.
信息光子学与光通信国家重点实验室, 北京邮电大学, 北京 100876

基金项目: 高等学校博士学科点专项科研基金(批准号: 20110005110014)、北京邮电大学青年创新专项基金(批准号: BUPT2011RC009)、北京邮电大学优秀博士生创新基金(批准号: CX201121)和深圳市科技研发资金基础研究计划 (批准号: JC201105191003A)资助的课题.

Authors and contacts

1.
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

Funds: Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20110005110014), the Scientific Fund for Chinese Universities (Grant No. BUPT 2011RC009), and BUPT Excellent Ph.D. Students Foundation (Grant No. CX201121), and the Basic Research Program of the Shenzhen Science and Technology R D Fund (Grant No. JC201105191003A).

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施引文献

[1]	Yu J J, Zhou X, Huang M F 2009 IEEE Photon. Technol. Lett. 21 1299
[2]	Zhou X, Yu J J, Huang M F, Shao Y, Wang T, Magill P, Cvijetic M, Nelson L, Birk M, Zhang G D, Ten S, Matthew H B, Mishra S K 2009 Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC) San Diego, California, America, March 22-26, 2009 pPDPB4
[3]	Gavioli G, Torrengo E, Bosco G, Carena A, Curri V, Miot V, Poggiolini P, Belmonte M, Forghieri F, Muzio C, Piciaccia S, Brinciotti A, Porta A L, Lezzi C, Savory S, Abrate S 2010 Optical Fiber Communication/ National Fiber Optic Engineers Conference (OFC/NFOEC) San Diego, California, America, March 21-25, 2010 pOThD3
[4]	Gavioli G, Torrengo E, Bosco G, Carena A, Savory S, Forghieri F, Poggiolini P 2010 IEEE Photon. Technol. Lett. 22 1419
[5]	Yu J J, Dong Z, Chi N 2011 IEEE Photon. Technol. Lett. 23 1061
[6]	Liu X, Chandrasekhar S, Chen X, Winzer P J, Pan Y, Zhu B, Taunay T F, Fishteyn M, Yan M F, Fini J M, Monberg E M, Dimarcello F V 2011 European Conference and Exhibition on Optical Communication (ECOC) Vienna, Austria, September 18-22, 2011 pTh.13.B.1
[7]	Tan Z Y, Guo X G, Cao J C, Li H, Han Y J 2010 Acta Phys. Sin. 59 2391 (in Chinese) [谭智勇, 郭旭光, 曹俊诚, 黎华, 韩英军 2010 59 2391]
[8]	Jia X H, Zhong D Z, Wang F, Chen H T 2007 Acta Phys. Sin. 56 2637 (in Chinese) [贾新鸿, 钟东洲, 王飞, 陈海涛 2007 56 2637]
[9]	Chandrasekhar S, Liu X, Zhu B Y, Peckham D W 2009 European Conference and Exhibition on Optical Communication (ECOC) Vienna, Austria, September 20-24, 2009 pPD2.6
[10]	Zhu B Y, Liu X, Chandrasekhar S, Peckham D W, Lingle R 2010 IEEE Photon. Technol. Lett. 22 826
[11]	Liu X, Chandrasekhar S, Zhu B Y, Peckham D W 2010 Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC) San Diego, California, America, March 21-25 2010 pOWO2
[12]	Ma Y R, Yang Q, Tang Y, Chen S M, Shieh W 2009 Opt. Express 17 9421
[13]	Ma Y R, Yang Q, Tang Y, Chen S M, Shieh W 2009 Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC) San Diego, California, America, March 22-26, 2009 pPDPC1
[14]	Gavioli G, Torrengo E, Bosco G, Carena A, Savory S J, Forghieri F, Poggiolini P 2010 IEEE Photon. Technol. Lett. 22 1419
[15]	Morohashi I, Sakamoto T, Yamamoto N, Sotobayashi H, Kawanishi T, Hosako I 2011 Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC) Los Angeles, California, America, March 6-10, 2011 pJThA29
[16]	Yu J J, Dong Z, Xiao X, Xia Y, Shi S P, Ge C, Zhou W Q, Chi N, Shao Y F 2011 Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC) Los Angeles, California, America, March 6-10, 2011 pPDPA6
[17]	Zhang J W, Chi N, Yu J J, Shao Y F, Zhu J B, Huang B, Tao L 2011 Opt. Express 19 12891
[18]	Yu J J, Dong Z, Zhang J W, Xiao X, Chien H C, Chi N 2012 J. Lightwave Technol. 30 458
[19]	Zhang J W, Yu J J, Dong Z, Shao Y F, Chi N 2011 Opt. Express 19 26370
[20]	Ma Y R, Yang Q, Tang Y, Chen S M, Shieh W 2010 J. Lightwave Technol. 28 308
[21]	Li J P, Li X, Zhang X G, Tian F, Xi L X 2010 Opt. Express 18 17597
[22]	Li J P, Li X, Zhang X G, Tian F, Xi L X 2010 European Conference and Exhibition on Optical Communication (ECOC), Torino, Italy, September19-23, 2010, p3.05
[23]	Li J P, Zhang X G, Tian F, Xi L X 2011 Opt. Express 19 848
[24]	Li J P, Zhang X G, Tian F, Xi L X 2011 Optical Fiber Communication/ National Fiber Optic Engineers Conference (OFC/NFOEC) Los Angeles, California, America, March 6-10, 2011 pOWE4
[25]	Tian F, Zhang X G, Li J P, Xi L X 2011 J. Lightwave Technol. 29 1085
[26]	Tian F, Zhang X G, Li J P, Xi L X 2010 Chin. Phys. Lett. 27 094206
[27]	Xi L X, Li J P, Zhang X G, Tian F, Zhang W B 2011 Chin. Phys. B 20 084202
[28]	Kawanishi T, Izutsu M 2004 IEEE Photon. Technol. Lett. 16 1534

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