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Novel lightsources with variable frequency, waveform, and number of channels for communications and sensings.

具有可变频率、波形和通道数量的新型光源，用于通信和传感。

基本信息

批准号：
16560292
负责人：
KISHI Naoto
金额：
$ 2.37万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

The purpose of the project is to develop lightsources with controllabilities of their frequencies, waveforms, and number of channels. The achievements of this project are as follows.With the use of semiconductor-amplifier based waveform/wavelength converter, a 16-channel multi-wavelength light-source with variable pulsewidth between 10ps and 90ps were demonstrated. The generated optical signals were successfully applied to transmission over fibers with various dispersion values between - 100ps/nm and 460ps/nm so that the power penalties of received signals were minimized by adjusting the pulsewidths. Pulsewidth optimized signal was also found to be superior to conventionally used optical signal formats.A multi-wavelength fiber laser with an intra-cavity phase modulation was demonstrated. Multi-wavelength output with a good spectral flatness within 5nm was successfully demonstrated.Wavelength conversion with a semiconductor optical amplifier was applied to realize a variable wavelength optical clock in the wavelength range between 1460nm and 1610nm. 10GHz clock signal was successfully obtained with a very high optical signal to noise ratio.Narrow-linewidth single-polarization single-frequency fiber laser controlled by an external light injection was demonstrated. With a proper adjustment of lasing and external light powers, low-drift wavelength tunable operation between 1545nm and 1560nm was achieved.Improvement of multi-wavelength lightsource based on supercontinuum spectrum generation through Raman soliton effect in optical fiber was investigated with the use of seed pulses with shorter pulsewidth. With the use of 1.3ps pulsewidth seed light source, larger bandwidth and better flatness of the generated spectrum was obtained. Detailed characterization of the generated spectrum is still in progress.

该项目的目的是开发具有可控频率、波形和通道数量的光源。本项目的成果如下：利用基于半导体放大器的波形/波长转换器，实现了脉冲宽度在10ps和90ps之间的16通道多波长光源。在- 100ps/nm ~ 460ps/nm的色散值范围内，通过调整脉冲宽度，使接收信号的功率损失最小化。脉宽优化信号也优于传统的光信号格式。介绍了一种腔内相位调制的多波长光纤激光器。成功地展示了5nm范围内具有良好光谱平坦度的多波长输出。采用半导体光放大器进行波长转换，实现了波长范围为1460nm ~ 1610nm的可变波长光时钟，成功获得了10GHz的时钟信号，光信噪比非常高。介绍了采用外注入光控制的窄线宽单偏振单频光纤激光器。通过适当调整激光器和外部光功率，实现了1545nm ~ 1560nm范围内的低漂移波长可调。利用短脉宽的种子脉冲，研究了利用光纤中拉曼孤子效应产生超连续光谱对多波长光源的改进。使用脉冲宽度为1.3ps的种子光源，可以获得更大的带宽和更好的平坦度。生成光谱的详细表征仍在进行中。