光子模数转换关键技术及其应用
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摘要
采用新型可饱和吸收体和锁模机制,研制了低抖动高重频宽光谱飞秒光纤激光器,并实现了高性能光采样脉冲的产生.给出了时间-波长交织和时间拉伸光模数转换系统架构;阐明了通道失配产生的原因及其校正方法;研究了光模数转换在雷达和示波器等系统中应用的关键技术.实验结果表明,利用光子学高速宽带特点实现的光子模数转换器,可有效克服电子瓶颈,实现高速宽带信号的采样.
A new kind of femtosecond fiber laser with low timing jitter,high repetition rate and broad flattened bandwidth was developed using new saturable absorber and mode locking mechanism,from which high performance sampling pulses were generated.The schemes of photonic analog-to-digital converters(PADCs)based on time-wavelength interleaving and time stretch were presented.Methods to identify and compensate the channel mismatches were described.Key issues for practical applications of PADC in Radar and oscilloscope systems were depicked.Expermental results show that PADC,which takes advantage of the inherent characteristics of photonics,is an effetive way to overcome the bottle neck of electronics for sampling high speed and broadband signals.
A new kind of femtosecond fiber laser with low timing jitter,high repetition rate and broad flattened bandwidth was developed using new saturable absorber and mode locking mechanism,from which high performance sampling pulses were generated.The schemes of photonic analog-to-digital converters(PADCs)based on time-wavelength interleaving and time stretch were presented.Methods to identify and compensate the channel mismatches were described.Key issues for practical applications of PADC in Radar and oscilloscope systems were depicked.Expermental results show that PADC,which takes advantage of the inherent characteristics of photonics,is an effetive way to overcome the bottle neck of electronics for sampling high speed and broadband signals.
引文
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[19] YANG Guang,ZOU Weiwen,LI Xing,et al.Theoretical and experimental analysis of channel mismatch in time-wavelength interleaved optical clock based on mode-locked laser[J].Optics Express,2015,23(3):2174-2186.
[20] YANG Guang,ZOU Weiwen,YU Lei,et al.Compensation of multi-channel mismatches in high-speed high-resolution photonic analogto-digital converter[J].Optics Express,2016,24(21):24061-24074.
[21] GHELFI P,LAGHEZZA F,SCOTTI F,et al.A fully photonics-based coherent radar system[J].Nature,2014,507(7492):341-345.
[22] XU Shaofu,ZOU Weiwen,YANG Guang,et al.Ultra-high range resolution demonstration of a photonics-based microwave radar using high-repetitionrate mode-locked fiber laser[J].Chinese Optical Letters,2018,6(6):062801.
[23] YANG Guang,ZOU Weiwen,YUAN Ye,et al.Wideband signal detection based on high-speed photonic analog-to-digital converter[J].Chinese Optics Letters,2018,18(3):030601.
[24] ZOU Weiwen,ZHANG Hao,LONG Xin,et al.Allopticalcentral-frequency-programmableand bandwidth-tailorable radar[J].Scientific reports,2016,6:19786.
[25] ZHANG Hao,ZOU Weiwen,CHEN Jianping,et al.Generation of a widely tunable linearly chirped microwave waveform based on spectral filtering and unbalanced dispersion[J].Optics Letters,2015,40(6):1085-1088.
[26] PAN Shilong, YAO Jianping. Photonics-based broadband microwave measurement[J].Journal of Lightwave Technology,2017,35(16):3498-3513.
[27] ZHANG Siteng,ZOU Weiwen,QIAN Na,et al.Enlarged range and filter-tuned reception in photonic time-stretched microwave Radar[J].IEEE Photonics Technology Letters,2018,30(11):1028-1031.
[28]钱阿权,邹卫文,吴龟灵,等,光子时间拉伸模数转换系统的多通道化设计与实现[J].中国激光,2015,42(5):146-153.QIAN Aquan,ZOU Weiwen,WU Guiling,et al.Design and implementation of multi-channel photonic time-stretch analog-to-digital converter[J].Chinese Journal of Lasers,2015,42(5):146-153.
[2] KHILO A,SPECTOR S J,GREIN M E,et al.Photonic ADC:Overcoming the bottleneck of electronic jitter[J].Optics Express,2012,20(4):4454-4469.
[3] VALLEY G C,HURRELL J P,SEFLER G A.Photonic analog-to-digital converters:Fundamental and practical limits[J].Proc SPIE,2004,5618:96-106.
[4] TAYLOR H F.An electro-optic analog-to-digital converter[J].Proc of IEEE,1975,63:1524-1525.
[5]陈建平,郭攀,李铭,等.高速光模-数转换关键技术[J].红外与激光工程,2010,39(3):447-451.CHEN Jianping,GUO Pan,LI Ming,et al.Key techniques in high-speed photonic A/D conversion[J].Infrared and Laser Engineering,2010,39(3):447-451.
[6] WU Guiling,LI Siqi,LI Xinwan,et al.18 wavelengths 83.9Gs/s optical sampling clock for photonic A/D converters[J].Optics Express,2010,18(20):21162-21168.
[7] WU Kan,ZHANG Xiaoyan, WANG Jun,et al.463-MHz fundamental mode-locked fiber laser based on few-layer MoS2 saturable absorber[J].Optics Letters,2015,40(7):1374-1377.
[8] LI Xing,ZOU Weiwen,YANG Guang,et al.Direct generation of 148nm and 44.6fs pulses in an erbiumdoped fiber laser[J].IEEE Photonics Technology Letters,2015,27(1):93-96.
[9] LI Xing,ZOU Weiwen,CHEN Jianping.Passive harmonic hybrid mode-locked fiber laser withextremely broad spectrum[J]. Optics Express,2015,23(16):21424-21433.
[10] LI Xing,ZOU Weiwen,WU Kan,et al.Timingjitter reduction by use of a spectral filter in a broadband femtosecond fiber laser[J].IEEE Photonics Technology Letters,2015,27(8):911-914.
[11] WANG Shubing,ZHANG Zhiyao,PENG Di,et al.Sagnac-loop-based optical coding for all-optical analog-to-digital conversion employing soliton selffrequency shift[J].Acta Photonica Sinica,2017,46(11):1125002.
[12] SU Feiran,WU Guiling,YE Lei,et al.Effects of the photonic sampling pulse width and the photodetection bandwidth on the channel response of photonic ADCs[J].Optics Express,2016,24(2):924-934.
[13] FARD A M,GUPTA S,JALALI B,et al.Photonic time-stretch digitizer and its extension to real-time spectroscopy and imaging[J].Laser&Photonics Reviews,2013,7(2):207-263.
[14]夏楠,陈颖,陈向宁,等.光纤非线性效应对光子时间拉伸模数转换系统性能的影响[J].光学学报,2014,34(6):0606002.XIA Nan,CHEN Ying,CHEN Xiangning,et al.Impact of nonlinearity effect on the performance of photonic time-stretch analog-to-digital converter system[J].Acta Optica Sinica,2014,34(6):0606002.
[15] ZHANG Huajie,ZOU Weiwen,YANG Guang,et al.Dual-output modulation in time-wavelength interleaved photonic analog-to-digital converter based on actively mode-locked laser[J].Chinese Optics Letters,2016,14(3):030602.
[16]李博,吴龟灵,苏斐然,等.基于相位调制器的相位编码光模数转换分析和实验研究[J].中国激光,2015,42(5):0505002.LI Bo,WU Guiling,SU Feiran,et al.Analysis and experimental study on phase-encoded photonic analogto-digital conversion based on phase modulator[J].Chinese Journal of Lasers,2015,42(5):0505002.
[17]高峰,吴龟灵,张进,等.EOM波长相关性对相位编码光模数转换系统的影响[J].光通信技术,2014,4:54-56.GAO Feng,WU Guiling,ZHANG Jin,et al.Effect of the wavelength sensitivity of electro-optic modulator on a multi-wavelength phase-encoded PADC[J].Optical Communication Technology,2014,4:54-56.
[18]刘锐,吴龟灵,苏斐然,等.通路不对称对基于平衡探测的光模数转换系统性能的影响[J].中国激光,2017,44(5):0506001.LIU Rui,WU Guiling,SU Feiran,et al.Effect of path asymmetry on performance of optical analog-todigital conversion system based on balanced detection[J].Chinese Journal of Lasers,2017,44(5):0506001.
[19] YANG Guang,ZOU Weiwen,LI Xing,et al.Theoretical and experimental analysis of channel mismatch in time-wavelength interleaved optical clock based on mode-locked laser[J].Optics Express,2015,23(3):2174-2186.
[20] YANG Guang,ZOU Weiwen,YU Lei,et al.Compensation of multi-channel mismatches in high-speed high-resolution photonic analogto-digital converter[J].Optics Express,2016,24(21):24061-24074.
[21] GHELFI P,LAGHEZZA F,SCOTTI F,et al.A fully photonics-based coherent radar system[J].Nature,2014,507(7492):341-345.
[22] XU Shaofu,ZOU Weiwen,YANG Guang,et al.Ultra-high range resolution demonstration of a photonics-based microwave radar using high-repetitionrate mode-locked fiber laser[J].Chinese Optical Letters,2018,6(6):062801.
[23] YANG Guang,ZOU Weiwen,YUAN Ye,et al.Wideband signal detection based on high-speed photonic analog-to-digital converter[J].Chinese Optics Letters,2018,18(3):030601.
[24] ZOU Weiwen,ZHANG Hao,LONG Xin,et al.Allopticalcentral-frequency-programmableand bandwidth-tailorable radar[J].Scientific reports,2016,6:19786.
[25] ZHANG Hao,ZOU Weiwen,CHEN Jianping,et al.Generation of a widely tunable linearly chirped microwave waveform based on spectral filtering and unbalanced dispersion[J].Optics Letters,2015,40(6):1085-1088.
[26] PAN Shilong, YAO Jianping. Photonics-based broadband microwave measurement[J].Journal of Lightwave Technology,2017,35(16):3498-3513.
[27] ZHANG Siteng,ZOU Weiwen,QIAN Na,et al.Enlarged range and filter-tuned reception in photonic time-stretched microwave Radar[J].IEEE Photonics Technology Letters,2018,30(11):1028-1031.
[28]钱阿权,邹卫文,吴龟灵,等,光子时间拉伸模数转换系统的多通道化设计与实现[J].中国激光,2015,42(5):146-153.QIAN Aquan,ZOU Weiwen,WU Guiling,et al.Design and implementation of multi-channel photonic time-stretch analog-to-digital converter[J].Chinese Journal of Lasers,2015,42(5):146-153.