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	1. Photonic Microwave Downconverter Based on an Optoelectronic Oscillator
	TANG Zhenzhou,ZHANG Fangzheng,PAN Shilong
	Electrics, Communication and Autocontrol Technology 21 October 2013
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	Abstract:A novel and compact photonic microwave downconverter is proposed and experimentally demonstrated based on an optoelectronic oscillator (OEO) using a single dual-drive Mach-Zehnder modulator (DMZM). The DMZM is used to simultaneously convert the input RF signal into an optical signal, form an OEO for RF carrier extraction, and downconvert the optical RF signal to the baseband. In the experiment, a 2-Gb/s NRZ coded 10.66-GHz RF signal is successfully downconverted to the baseband. In addition, a microwave receiver for wireless high-definition (HD) video transmission is built and verified based on the proposed downconverter. The experiment results confirm that the proposed downconverter has simple configuration, good downconversion performance and very stable operation.
	TO cite this article:TANG Zhenzhou,ZHANG Fangzheng,PAN Shilong. Photonic Microwave Downconverter Based on an Optoelectronic Oscillator[OL].[21 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4565213


	2. Enhancing the short-circuit current and efficiency of organic solar cells using Al-doped zinc oxide nanoparticles
	Zhang Yongzhi,Li Fushan,Guo Tailiang
	Electrics, Communication and Autocontrol Technology 09 September 2013
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	Abstract:In this paper, Al-doped zinc oxide (AZO) nanoparticles (NPs) were formed on indium tin oxide (ITO) electrode by thermal annealing AZO thin film prepared using sputtering method. Polymer solar cells using ITO, ITO/AZO thin film, and ITO/AZO NPs as anodes were prepared, and it was shown that the short-circuit current and power conversion efficiency of the solar cells could be significantly improved by depositing AZO NPs on ITO electrodes. The mechanism for improving the performance of the bulk-heterojunction polymer solar cells by using ITO/AZO NPs anode was systematically investigated. Our study opens up avenues for enhancing efficiency of polymer solar cells by structuring the electrodes with AZO NPs.
	TO cite this article:Zhang Yongzhi,Li Fushan,Guo Tailiang. Enhancing the short-circuit current and efficiency of organic solar cells using Al-doped zinc oxide nanoparticles[OL].[ 9 September 2013] http://en.paper.edu.cn/en_releasepaper/content/4558043

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	3. Micro-cavity lasers with directional emission and its characteristic comparison
	Yan Changling,Shi Jianwei,Li Peng
	Electrics, Communication and Autocontrol Technology 08 May 2013
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	Abstract:We demonstrated Lima?on-shaped micro-cavity lasers with directional emission. In experiment, this kind of micro-cavity laser was fabricated with the deformed factor at 0.41, characterized and compared with the traditional F-P cavity ridge laser prepared with the same material at a wavelength of about 10um. From the experimental results, the micro-cavity laser showed an highly directional emission (about 9mW in output peak power) with parallel directional divergence angle of 30 and perpendicular divergence angle of 67 at full width of half maximum, which is similar to that of the ridge laser. The threshold current density of the micro-cavity laser was about 40% lower than that of the ridge laser, and the quality factor was estimated up to 1140.
	TO cite this article:Yan Changling,Shi Jianwei,Li Peng. Micro-cavity lasers with directional emission and its characteristic comparison[OL].[ 8 May 2013] http://en.paper.edu.cn/en_releasepaper/content/4537873


	4. Generation of 40GHz Short Pulses for OTDM Demultiplexing Using Cascaded MZMs
	WANG Ning,LI Yan,WU Jian
	Electrics, Communication and Autocontrol Technology 04 May 2013
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	Abstract:In this paper, we experimentally demonstrated the generation of 40GHz phase stable short pulses based on cascaded Mach-Zehnder modulators (MZM). The pulse width is measured to be 4.2ps. The time jitter, extinction ratio (ER) and optical signal-to-noise ratio (OSNR) are measured to be better than 80fs, 18dB and 50dB respectively. The generated optical pulses can be further used for demultiplexing in 4*40GBaud/s optical time-division muletiplexing (OTDM) systems.
	TO cite this article:WANG Ning,LI Yan,WU Jian. Generation of 40GHz Short Pulses for OTDM Demultiplexing Using Cascaded MZMs[OL].[ 4 May 2013] http://en.paper.edu.cn/en_releasepaper/content/4541013


	5. Tunable single-longitudinal-mode erbium-doped fiber laser employing a two-taper Mach-Zehnder interferometer filter and saturable absorber
	ZHANG Zhao,CAO Zhigang,SHUI Tao,JI Xiaochun,WANG Rui,YU Benli
	Electrics, Communication and Autocontrol Technology 05 March 2013
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	Abstract:In this paper，we propose and demonstrate a tunable and stable single-longitudinal-mode (SLM) erbium fiber laser with 1.4 kHz linewidth. A two-taper Mach-Zehnder interferometer filter as a wavelength -selective component and 5-meter-long unpumped erbium-doped fiber (EDF) as a saturable absorber(SA) are used in the cavity. By adjusting the curvature of two-taper, the center wavelength of the laser can be tuned from 1545.4 nm to 1561.9 nm. The maximum optical signal to noise ratios（OSNR）is 40 dB and the power variation is less than 0.06 dB in one hour under room temperature.
	TO cite this article:ZHANG Zhao,CAO Zhigang,SHUI Tao, et al. Tunable single-longitudinal-mode erbium-doped fiber laser employing a two-taper Mach-Zehnder interferometer filter and saturable absorber[OL].[ 5 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4524719


	6. Multiwavelength Brillouin-Erbium Fiber Laser with Single and Double Brillouin-frequency Spacing
	SHUI Tao,CAO Zhigang,ZHANG Xifen,JI Xiaochun,WANG Rui,ZHANG Zhao,YU Benli
	Electrics, Communication and Autocontrol Technology 05 March 2013
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	Abstract:In this paper, a Brillouin-erbium fiber laser (BEFL) is demonstrated to obtain multiple channels with both single and double Brillouin-frequency spacing. The BEFL consists of a dual-cavity which is constructed by a 3 port circulator and a 50/50 coupler. The dual-cavity shares a single mode fiber (SMF) approximately 1 km in length and an EDFA to produce interdependent bi-directional Stokes signals. A tunable laser and a 980-nm laser diode are used as the Brillouin pump and the EDF pump respectively. The impact of EDF pump power, Brillouin pump wavelength and power on the tuning range and number of Stokes generated are investigated. The dual-cavity BEFL can operate at most 10 channels with double Brillouin-frequency spacing or 20 channels with single Brillouin-frequency spacing.
	TO cite this article:SHUI Tao,CAO Zhigang,ZHANG Xifen, et al. Multiwavelength Brillouin-Erbium Fiber Laser with Single and Double Brillouin-frequency Spacing[OL].[ 5 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4524223


	7. Generation and Synchronization of Feedback-induced Chaos in Semiconductor Ring Lasers by Injection-Locking
	Guohui Yuan,Xin Zhang,Zhuoran Wang
	Electrics, Communication and Autocontrol Technology 25 December 2012
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	Abstract:A smart scheme for chaotic signal generation in a semiconductor ring laser (SRL) with optical feedback is proposed and investigated numerically. The chaotic oscillation in the SRL can be generated by the partial reflection of the laser output. Time series, attracter and the power spectrum, as well as the Lyapunov exponent spectrum, are calculated and analyzed. We also study the synchronization scheme of feedback-induced chaos in SRLs by optical injection that consists of a drive SRL with optical feedback and a response SRL with optical injection from the drive laser. High-quality synchronization is achieved with suitable injection strength and detuning frequency between the drive and the response SRLs.
	TO cite this article:Guohui Yuan,Xin Zhang,Zhuoran Wang. Generation and Synchronization of Feedback-induced Chaos in Semiconductor Ring Lasers by Injection-Locking[OL].[25 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4495478


	8. Three-dimensional planar metallic lenses based on concentric rings with modulated subwavelength width
	Feng Di,Zhang Chunxi
	Electrics, Communication and Autocontrol Technology 25 December 2012
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	Abstract:A kind of subwavelength planar metallic lenses (SPMLs) is proposed to realize far-field optical focusing in the visible range based on concentric rings with modulated width in a silver film. The width of each metallic ring is variant so that the radiation fields of surface plasmon polaritons can be controlled and the relevant phase retardations can be modulated to make a beam focus at the desired position. The beam properties of SPMLs with subwavelength concentric rings are numerically investigated through the three-dimensional finite-difference time-domain method. For comparison, the subwavelength planar dielectric lenses (SPDLs) structured on silica glass with the same concentric ring shapes as SPMLs are analyzed, although without opaque metal coating on SPDLs, the computational results show that SPMLs can support higher intensity focal spot, narrower full-width half-maximum beam width, and longer depth of focus at the focal region under certain lens thickness due to the coupling of surface plasomon polaritons, diffracted evanescent waves and propagated electromagnetic waves. This kind of new SPMLs may have a good potential for applications in photonic and plasmonic integrated devices, sensing, and nano-optical manipulations, etc.
	TO cite this article:Feng Di,Zhang Chunxi. Three-dimensional planar metallic lenses based on concentric rings with modulated subwavelength width[OL].[25 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4502397


	9. Planar lenses based on nano-scale metallic slits in visible range
	Feng Di,Zhang Chunxi
	Electrics, Communication and Autocontrol Technology 11 December 2012
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	Abstract:A kind of planar metallic lenses is proposed to realize optical focusing in the visible wavelength through a metallic film with nano-scale slit arrays, which have the same depth but tuning widths. Due to the subwavelength and aperiodic nature of planar metallic lenses, we present the rigorous electromagnetic analysis by using two dimensional finite difference time domain method. The electromagnetic wave transports through the tuning slits in the form of surface plasmon polaritons, and gets the required phase retardations to focusing at the focal plane. We analyze the focusing characteristics of planar dielectric lens and metallic lens with tuning widths that are obtained by generalizing the relevant phase delay, for different incidence polarization waves (TM polarized case and TE polarized case). The computational calculation results show that, extraordinary optical transmission of surface plasmon polaritions through non uniform nano-scale metallic slits is observed, and it has contributions to the optical focusing, but cannot increase the focal energy compared with dielectric planar lens with the same profile, and the metallic lenses are more sensitive to the polarization of incidence wave than that of dielectric lenses. The influence of metallic lenses' thickness on the focal characteristics has been analyzed also.
	TO cite this article:Feng Di,Zhang Chunxi. Planar lenses based on nano-scale metallic slits in visible range[OL].[11 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4502451


	10. Chaos Generation in a Semiconductor Ring Laser with an Optical Injection
	Yuan Guohui ,Xin Zhang,Zhuoran Wang
	Electrics, Communication and Autocontrol Technology 13 November 2012
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	Abstract:Two chaos generation schemes are demonstrated numerically based on a semiconductor ring laser (SRL) with either a constant or a chaotic optical injection from an external distributed feedback (DFB) laser. Under a certain bias current, the chaotic output can be generated by the SRL with appropriate injection parameters. Parameter map is achieved numerically to show types of oscillation in the SRL. Bifurcation diagrams and lyapunov exponent spectra roughly describe the routes to chaos for the SRL with disturbance. A bandwidth-enhanced chaos generation can be achieved based on the chaotic optical injection scheme. The bandwidth of the bandwidth-enhanced chaos generated is about 12GHz, which achieves approximately a two-fold increase compared with the constant injection scheme.
	TO cite this article:Yuan Guohui ,Xin Zhang,Zhuoran Wang. Chaos Generation in a Semiconductor Ring Laser with an Optical Injection[OL].[13 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4495475

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