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Time-delay signature characteristics of the chaotic output from an optoelectronic oscillator by introducing an optical feedback

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Frontiers of Optoelectronics 2020年第4期13卷 402-408页

作者： Xixuan LIU Xi TANG Zhengmao WU guangqiong xia School of Physical Science and Technology Southwest UniversityChongqing 400715China

In this work,via autocorrelation function(ACF)and permutation entropy(PE)methods,we numerically investigate the time-delay signature(TDS)characteristics of the chaotic signal output from an optoelectronic oscillator(OEO)after introducing an extra optical feedback *** results demonstrate that,for such a chaotic system,both the optoelectronic feedback with a delay time of T1 and the optical feedback with a delay time of T2 contribute to the TDS of generated *** TDS of the chaotic signal should be evaluated within a large time window including T1 and T2 by the strongest peak in the ACF curve of the chaotic signal,and the strongest peak may locate at near T1 or *** mapping the evolution of the TDS in the parameter space of the optical feedback strength and time,certain optimized parameter regions for achieving a chaotic signal with a relatively weak TDS can be determined.

关键词： optoelectronic oscillator(OEO) chaotic output time-delay signature(TDS) optical feedback

Modulation response performances of a Fabry-Perot semiconductor laser subjected to light injection from another Fabry-Perot semiconductor laser

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Chinese Science Bulletin 2009年第20期54卷 3643-3648页

作者： xia guangqiong WU ZhengMao YANG Qi LIN xiaoDong School of Physics Southwest University Chongqing 400715 China State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China

The modulation response characteristics of a Fabry-Perot semiconductor laser(slave FP-LD) subjected to light injection from another Fabry-Perot semiconductor laser(master FP-LD) have been investigated *** results show that the modulation response performances of the slave FP-LD depend on the light injection strength,the central mode frequency detuning Δf and the mode spacing difference Δλ between the slave FP-LD and the master *** the increase of the light injection strength from the master FP-LD,the 3 dB modulation bandwidth of the slave FP-LD will be enhanced;however,if the injection strength is increased to certain degree,the front side of the relaxation oscillation peak will be reduced to below 3 dB,which results in the rapid decrease of the 3 dB modulation *** the increase of Δf,for a relatively small injection strength level,the 3 dB modulation bandwidth will behave a monotonous enlargement until the slave FP-LD operates in a period-one state(P1).For a relatively strong optical injection level,the slave FP-LD has a broad injection-locked frequency detuning *** the injection-locked area,with the increase of frequency detuning Δf,the 3dB modulation bandwidth increases at first and then decreases after experiencing a maximum *** given light injection strength and frequency detuning,the 3 dB modulation bandwidth of the slave FP-LD has two maximums and behaves a symmetrical distribution with the change of Δλ.By choosing reasonable parameters,the 3 dB modulation bandwidth can be significantly *** the parameter values selected in this paper,the 3 dB modulation bandwidth can increase 5.5 times compared with the case of free running.

关键词：半导体激光器注射曝光表演调制

Nonlinear dynamics of 1550 nm VCSELs subject to polarization-preserved optical feedback and orthogonal optical injection

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Frontiers of Optoelectronics 2013年第3期6卷 243-250页

作者： Bin WEI Zhengmao WU Tao DENG guangqiong xia School of Physical Science and Technology Southwest Ulaiversity Chongqing 400715 China

Based on spin-flip model （SFM）, the nonlinear dynamics of 1550nm vertical-cavity surface-emitting lasers （VCSELs） subject to polarization-preserved optical feedback （PPOF） and orthogonal optical injection （OOI） are theoretically investigated. The results show that two linear polarization （LP） modes can be simultaneously stimulated and polarization switching （PS） can be observed, which is different from the case that only y LP mode exists in a VCSEL with PPOF. Under the joint action of PPOF and OOI, the two LP modes will exhibit rich dynamical states, such as period one, period two, multi- period and chaos oscillation. Different evolution routes to chaos can be also observed. Moreover, frequency detuning Af（Af=fm fs, wherefn andfs are the center frequencies of free-running master VCSEL and slave VCSEL, respectively） has an obvious influence on the PS. With the increase of the positive frequency detuning PS points shift toward larger injection strengths; meanwhile, a suitable negative frequency demning value makes the injection strength for PS be the lowest.

关键词： vertical-cavity surface-emitting lasers(VCSELs) nonlinear dynamics orthogonal optical injec-tion (OOI) polarization-preserved optical feedback (PPOF)

Impacts of mismatched intrinsic parameter on leader-laggard synchronization between two mutually coupled VCSELs

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Frontiers of Optoelectronics 2011年第3期4卷 298-307页

作者： Lingbo ZENG Tao DENG Zhengmao WU Jiagui WU guangqiong xia School of Physics Southwest University State Key Laboratory of Millimeter Waves Southeast University

Based on spin-flip model(SFM), the impacts of mismatched intrinsic parameter on leader-laggard chaos synchronization between two mutually coupled verticalcavity surface-emitting lasers(VCSELs) have been investigated numerically. Results show that, for two VCSELs with identical intrinsic parameter, the switching point of leader-laggard caused by continually varying frequency detuning or injection rate detuning is located at zero frequency detuning or zero injection rate detuning,which indicates that the VCSEL with higher frequency or subject to lower injection level plays a leader ***, for two VCSELs with mismatched intrinsic parameter, the switched point of leader-laggard will deviate from zero frequency detuning or zero injection rate. Therefore, compared with the results obtained under matched intrinsic parameter, the opposite results have been observed in the range between zero detuning and switching point. Additionally, the offsets of switching point induced by different intrinsic parameters are different, and the influence of line-width enhancement factor is found to be the most significant.

关键词： vertical-cavity surface-emitting laser mutual coupling mismatched intrinsic parameter leader-laggard chaos synchronization

Studying　the　Mode－Spectra　Characteristics　of　An　Above－Threshold　Biased　Semiconductor　Laser

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Chinese Journal of Lasers 1994年第1期B3卷 11-16页

作者： xia guangqiong WU Zhengmao CHEN Jianguo LU Yucun(Optoelectronics Department, Sichuan University,Chengdu 610064, China) Sichuan Univ Chengdu China

ＳｔｕｄｙｉｎｇｔｈｅＭｏｄｅ－ＳｐｅｃｔｒａＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｎＡｂｏｖｅ－ＴｈｒｅｓｈｏｌｄＢｉａｓｅｄＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒ￥ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＷＵＺｈｅｎｇｍａｏ；Ｃ... 详细信息

ＳｔｕｄｙｉｎｇｔｈｅＭｏｄｅ－ＳｐｅｃｔｒａＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｎＡｂｏｖｅ－ＴｈｒｅｓｈｏｌｄＢｉａｓｅｄＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒ￥ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；ＬＵＹｕｃｕ...

关键词： semiconductor laser ray trace method mode suppression ratio carrier density

Effect　of　antireflection　coatings　on　the　peak　wavelength　of　output　spectrum　from　end　facet　of　a　semiconductor　laser

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Chinese Journal of Lasers 1994年第6期B3卷 495-499页

作者： WU Zhengmao xia guangqiong WU Lan CHEN Jianguo LU Yucun(Optoelectronics Dept., Sichoan Unly., Cbongdu 610064,China) Sichuan Univ Chengdu China

Ｅｆｆｅｃｔｏｆａｎｔｉｒｅｆｌｅｃｔｉｏｎｃｏａｔｉｎｇｓｏｎｔｈｅｐｅａｋｗａｖｅｌｅｎｇｔｈｏｆｏｕｔｐｕｔｓｐｅｃｔｒｕｍｆｒｏｍｅｎｄｆａｃｅｔｏｆａｓｅｍｉｃｏｎｄｕｃｔｏ... 详细信息

Ｅｆｆｅｃｔｏｆａｎｔｉｒｅｆｌｅｃｔｉｏｎｃｏａｔｉｎｇｓｏｎｔｈｅｐｅａｋｗａｖｅｌｅｎｇｔｈｏｆｏｕｔｐｕｔｓｐｅｃｔｒｕｍｆｒｏｍｅｎｄｆａｃｅｔｏｆａｓｅｍｉｃｏｎｄｕｃｔｏｒｌａｓｅｒ￥ＷＵＺｈｅｎｇｍａ...

关键词： semiconductor laser antireflection coating ray ttace method spectrumblue shift

Variation of Lasing Wavelength of Fiber Grating Semiconductor Laser with Temperature for Different External Cavity Lengths

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光学学报 2003年第S1期23卷 519-520页

作者： Zhengmao Wu, Hanqing Zhou, guangqiong xia, Department of Physics, Southwest Normal University, Chongqing 400715, P. R. China, Tel: 86-23-68254609 Department of Physics Southwest Normal University Chongqing 400715 P. R. China

For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the theoretical result... 详细信息

关键词： for on as WDM of Variation of Lasing Wavelength of Fiber Grating Semiconductor Laser with Temperature for Different External Cavity Lengths with

高斯光束斜入射非平行法布里珀罗干涉仪后的透射光强分布

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光学学报 2005年第1期25卷 109-114页

作者：刘木林吴正茂夏光琼西南师范大学物理学院重庆400715

　基于多光束干涉原理,推导出了高斯光束斜入射非平行法布里珀罗干涉仪射后的透射光强表达式,在此基础上,着重研究了高斯光束入射角的大小以及法布里珀罗干涉仪两反射端面的不平行度对透射光强分布的影响。研究结果表明:入射角的大小和... 详细信息

　基于多光束干涉原理,推导出了高斯光束斜入射非平行法布里珀罗干涉仪射后的透射光强表达式,在此基础上,着重研究了高斯光束入射角的大小以及法布里珀罗干涉仪两反射端面的不平行度对透射光强分布的影响。研究结果表明:入射角的大小和干涉仪的不平行度对透射光的强度分布、峰值强度的大小和峰值强度的位置有很大的影响;在入射高斯光束具有较小的腰斑半径或法布里珀罗干涉仪的两端面的反射率较大时,必须考虑高斯光束沿传输轴线的衍射效应;楔角为负的非平行法布里珀罗出射光斑的光强在“反跳”处急剧下降到零,可利用这一特点对距离进行精确测量。

关键词：物理光学透射光强分布多光束干涉非平行法布里-珀罗干涉仪斜入射高斯光束

Analytical　Solutions　of　Rate　Equations　of　Two－segment　Absorptive　Bistable　Semiconductor　Lasers

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Chinese Journal of Lasers 1995年第3期 193-198页

作者： WU Zhengmao CHEN Jianguo xia guangqiong LU Yucun(Optoelectronics Dept, Sichuan Univ. Chengdu. 610064, China)

ＡｎａｌｙｔｉｃａｌＳｏｌｕｔｉｏｎｓｏｆＲａｔｅＥｑｕａｔｉｏｎｓｏｆＴｗｏ－ｓｅｇｍｅｎｔＡｂｓｏｒｐｔｉｖｅＢｉｓｔａｂｌｅＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒｓ￥ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；... 详细信息

ＡｎａｌｙｔｉｃａｌＳｏｌｕｔｉｏｎｓｏｆＲａｔｅＥｑｕａｔｉｏｎｓｏｆＴｗｏ－ｓｅｇｍｅｎｔＡｂｓｏｒｐｔｉｖｅＢｉｓｔａｂｌｅＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒｓ￥ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＬＵＹ...

关键词： bistable semiconductor laser rate equation