Analog and Digital Optical Pulse Synthesizers Using Arrayed-Waveguide Gratings for High-Speed Optical Signal Processing
Analog and Digital Optical Pulse Synthesizers Using Arrayed-Waveguide Gratings for High-Speed Optical Signal Processing
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DOI：
10.1109/jlt.2007.916580
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发表时间：
2008-03
影响因子：
4.7
通讯作者：
H. Tsuda;Y. Tanaka;T. Shioda;T. Kurokawa
中科院分区：
文献类型：
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作者：
H. Tsuda;Y. Tanaka;T. Shioda;T. Kurokawa
本文研制了基于高分辨率阵列波导光栅(AWG)的模拟和数字光脉冲合成器。模拟型光学合成器包括一个集成了45度曲面反射镜的AWG，一个4-f透镜系统，以及一个光学可寻址的空间光调制器。有效频率分辨率为14.5 GHz。成功地进行了色散补偿实验，获得了变换受限的短脉冲。该数字光合成器包括30个频率分离的通道，间隔12.5 GHz，其中每个通道包括一个幅度调制器和一个相位调制器。该脉冲合成器与12.5 GHz间隔的光学频率梳一起产生了矩形脉冲。该合成器可以产生任意波形的光脉冲。此外，利用脉冲合成器的周期特性，结合超宽带波导型法布里-珀罗电光调制器，产生了250 GHz的重复频率脉冲串。
In this paper, analog and digital optical pulse synthesizers using high-resolution arrayed-waveguide gratings (AWG) have been developed. The analog type of optical synthesizer consists of an AWG with an integrated 45deg, curved-surfaced mirror, a 4-f lens system, and an optically addressable spatial light modulator. The effective frequency resolution is 14.5 GHz. A dispersion compensation experiment is successfully carried out and a transform-limited short pulse has been obtained. This digital type of optical synthesizer comprises 30 frequency separated channels with a spacing of 12.5 GHz, where each channel includes an amplitude modulator and a phase modulator. The rectangular-shaped pulse is generated with this pulse synthesizer, together with a 12.5-GHz-spacing, optical frequency comb. The synthesizer can generate an optical pulse with any waveform. Moreover, using periodic characteristics of the pulse synthesizer, a 250-GHz repetition rate pulse train was generated, in combination with an ultrawideband, waveguide type of Fabry-Perot electrooptic modulator.