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摘要

We investigate the principles of optical phase remodulation and demonstrate its application in a future-proof 10 Gb/s/channel wavelength-division-multiplexed (WDM) passive optical network to realize a colorless optical network unit and bidirectional transmission over a single fiber. The modulation depth of downstream differential phase-shift keying is properly reduced to facili

PDF全文 Chinese Optics Letters | 2017,15(06):060604
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We demonstrate the generation of mode-locked pulses in an erbium-doped fiber laser (EDFL) by using a new manganese-doped cadmium selenide quantum-dots-based saturable absorber. The laser produces a soliton pulse train operating at 1561.1 nm with a repetition rate of 1 MHz, as the pump power is varied from 113 to 250 mW. At the maximum pump power, we obtain the pulse duration of

PDF全文 Chinese Optics Letters | 2017,15(07):071405
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0 30 123

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Far-field blooming, a serious far-field dependence on driving current, affects the stability of beam quality and applications of broad-area (BA) diode lasers. In this Letter, the lateral ridge waveguide (LRW) is introduced to BA lasers by a simple and cost-effective approach to control the far-field stability and beam divergence. The influences of LRW length on output power, ne

PDF全文 Chinese Optics Letters | 2017,15(07):071404
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0 24 108

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A fused silica glass micro-channel can be formed by chemical etching after femtosecond laser irradiation, and the successful etching probability is only 48%. In order to improve the micro-channel fabrication success probability, the method of processing a high-temperature lattice by a femtosecond laser pulse train is provided. With the same pulse energy and scanning speed, the

PDF全文 Chinese Optics Letters | 2017,15(07):071403
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0 22 122

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Accurate and precise wavelength controlling of narrowband excimer lasers is essential for the lithography of an integrated circuit. High-precision wavelength tuning and calibration of a line-narrowed ArF laser are presented in this work. The laser spectrum is narrowed to a sub-picometer with a line narrowing system. Absolute wavelength calibration of the line-narrowed laser is

PDF全文 Chinese Optics Letters | 2017,15(07):071402
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0 32 116

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We demonstrate a continuous-wave (CW) dual-wavelength Nd:YVO4 laser working at 1064 and 1066 nm simultaneously. The method of Nd:YVO4 crystal angle tuning is used to balance the ratio of the stimulated emission cross sections of the two wavelengths, leading to the realization of a simultaneous dual-wavelength operation from only one laser. The experimental results show that at

PDF全文 Chinese Optics Letters | 2017,15(07):071401
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0 48 87

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We experimentally observe that Si micro-ring modulator (MRM) modulation characteristics are strongly influenced by the modulation data rate and the data pattern and determine this influence is due to the temperature increase caused by dynamic power dissipation within the Si MRM device. We also quantitatively determine the amount of Si MRM resonance wavelength shift due to diffe

PDF全文 Chinese Optics Letters | 2017,15(07):071301
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0 7 33

摘要

Lanthanide-doped polymers are very attractive, since they can be used for luminescent optical fiber fabrications. This Letter presents the terbium-ions-doped poly(methyl methacrylate) fiber fabrication and spectroscopic characterization. The measured excited state (D45) lifetime of 0.741 ms confirms that a used organometallic can be used to obtain an intense luminescence in a p

PDF全文 Chinese Optics Letters | 2017,15(07):070602
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摘要

S变换具有时频分析能力和多分辨率特点,可以看作是窗口傅里叶变换和小波变换的扩展。S变换不仅克服了傅里叶变换缺乏局部分析能力的不足,其变换系数又与待分析图像的傅里叶谱之间存在紧密联系,近年来被应用于条纹分析中。根据S变换系数的特点,深入研究了基于二维S变换的“脊”(2DSTR)分析方法和二维S变换“滤波”(2DSTF)分析方法,并对两种方法进行了详细对比。计算机模拟和实验验证了理论分析结果,研究结

PDF全文 激光与光电子学进展 | 2017,54(04):041206
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0 4 169

摘要

为了满足飞秒变像管扫描相机对偏转器的特殊要求,设计了一种应用于高速扫描相机的行波偏转器。根据Finch的行波偏转器设计理论,简化设计流程并利用HFSS软件建立偏转器模型,模拟并求解了行波偏转器的高频信号传播特性和通频带宽,通过电磁波相速度与电子束飞行速度的匹配确定了行波偏转器基本结构参数,并优化设计了一种适合应用于具有10 kV电子能量高速扫描相机的行波偏转器。所设计行波偏转器长度为44 mm,

PDF全文 激光与光电子学进展 | 2017,54(04):043201
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0 9 156
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