利用光纤挤压器实现的移相光模数转换器

彭越; 张洪明; 吴庆伟; 傅鑫; 姚敏玉

doi:doi:10.3788/cjl20103703.0748

中国激光, 2010, 37 (3): 748, 网络出版: 2010-03-11

利用光纤挤压器实现的移相光模数转换器

Phase-Shifted Photonic Analog-to-Digital Converter by Using Fiber Squeezer

论文大纲

彭越 ^*张洪明吴庆伟傅鑫姚敏玉

作者单位

清华大学电子工程系,清华大学信息科学与技术国家实验室,集成光电子学国家重点实验室,北京 100084

信号处理模数转换光量化偏振干涉光纤挤压器 signal processing analog-to-digital conversion optical quantization polarization interference fiber squeezer

摘要

提出了一种新型移相光量化方案,利用光纤挤压器使光纤传输截面产生应力双折射,从而实现移相量化编码。在实验中实现了4 bit移相光量化器,用10 GHz重复频率采样脉冲对2.5 GHz正弦信号进行量化,获得量化结果的信噪比为23.9 dB,对应的有效比特位为3.68 bit。同已有的方案相比,此方案结构简单,只需要一个相位调制器,避免了多调制器工作输入信号的同步问题;利用光纤挤压器实现移相,控制精度高且成本低,可以实现高于6 bit的理论量化精度;并且可以通过光脉冲复用技术实现更高的采样速率。

Abstract

In this paper,a novel phase-shifted photonic analog-to-digital conversion (PADC) scheme is presented. In order to realize the phase-shifted quantization,the phase difference between two polarizations is produced by press-induced birefringence in fiber squeezer. A 4-bit optical phase-shifted analog-to-digital system is demonstrated experimentally with 10 GS/s sampling rate,and 2.5 GHz sinusoidal electrical signal is sampled and quantized,achieving a signal-to-noise of 23.9 dB and an effective number of bits of 3.68 bits. Comparing with existing PADC methods,this scheme has a simple structure,and only needs one phase modulator,which avoids the problem of input signal synchronization;using the fiber squeezer as phase-shift module,the quantization resolution of higher than 6-bit can be achieved with high control precision and low cost;this scheme has the potential to realize higher sampling rate with optical pulses multiplex technology.

参考文献

[1] . H. Walden. Analog-to-digital converter survey and analysis[J]. IEEE J. Sel. Areas Commun., 1999, 17(4): 539-550.

[2] . R. Clark Jr.,M. L. Dennis. Toward a 100-Gsamples/s photonic A-D conversion[J]. IEEE Photon. Technol. Lett., 2001, 13(3): 236-238.

[3] . W. Juodawlkis,T. C. Twichell,G. E. Betts et al.. Optically sampled analog-to-digital converters[J]. IEEE Trans. Microw. Theory Tech., 2001, 49(10): 1840-1853.

[4] 彭璨,姚敏玉,张洪明等. 10 GHz主动锁模激光器[J]. 中国激光,2003,30(2):101-104

Peng Can,Yao Minyu,Zhang Hongming et al.. 10GHz actively mode-locked fiber ring laser [J]. Chinese J. Lasers,2003,30(2):101-104

[5] 王旌,张洪明,张鋆等. 基于饱和吸收镜的被动锁模光纤激光器[J]. 中国激光,2007,34(2):163-165

Wang Jing,Zhang Hongming,Zhang Jun et al.. Passively mode-locked fiber laser with a semiconductor saturable absorber mirror [J]. Chinese J. Lasers,2007,34(2):163-165

[6] . C. Valley. Photonic analog-to-digital converters[J]. Opt. Express, 2007, 15(5): 1955-1982.

[7] H. F. Taylor. An electrooptic analog-to-digital converter [C]. Proc. IEEE,1975,63(10):1524-1525

[8] . Jalali,Y. M. X. Optical folding-flash analog-to-digital converter with analog encoding[J]. Opt. Lett., 1995, 20(18): 1901-1903.

[9] . Ikeda,J. M. Abdul,H. Tobioka et al.. Design considerations of all-optical A/D conversion:nonlinear fiber-optic sagnac-loop interferometer-based optical quantizing and coding[J]. J. Lightwave Technol., 2006, 24: 2618-2628.

[10] . Stigwall,S. Galt. Demonstration and analysis of a 40 gigasample/s interferometric analog-to-digital conversion[J]. J. Lightwave Technol., 2006, 24(3): 1247-1256.

[11] . . All-optical analog-to-digital conversion based on polarization-differential interference and phase modulation[J]. IEEE Photon. Technol. Lett., 2007, 19(8): 625-627.

[12] . . All-optical analog-to-digital conversion using inherent multiwavelength phase shift in LiNbO3 phase modulator[J]. IEEE Photon. Technol. Lett., 2008, 20(12): 1036-1038.

[13] 章壮前,张洪明,傅鑫等. 一种采用并行光强度调制器的模数转换方法[J]. 中国激光,2008,35(3):378-382

Zhang Zhuangqian,Zhang Hongming,Fu Xin et al.. A new approach for analog to digital conversion based on double parallel optical intensity modulator [J]. Chinese J. Lasers,2008,35(3):378-382

[14] Luc B. Jeunhomme. Single-Mode Fiber Optics:Principles and Applications [M]. New York:Marcel Dekker,1983

彭越, 张洪明, 吴庆伟, 傅鑫, 姚敏玉. 利用光纤挤压器实现的移相光模数转换器[J]. 中国激光, 2010, 37(3): 748. Peng Yue, Zhang Hongming, Wu Qingwei, Fu Xin, Yao Minyu. Phase-Shifted Photonic Analog-to-Digital Converter by Using Fiber Squeezer[J]. Chinese Journal of Lasers, 2010, 37(3): 748.

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