权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Wavelength Stabilization of a Semiconductor Laser in High-Speed Modulation Using Saturated Absorption Spectroscopy of Atomic Lines

使用原子线饱和吸收光谱进行高速调制中半导体激光器的波长稳定

基本信息

批准号：
63550250
负责人：
SHIMBA Minoru
金额：
$ 1.47万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550250/
关键词：
Semiconductor Laser Wavelength Stabilization Modulation Absorption Spectroscopy 半導体レーザ

项目摘要

We stabilized the oscillation frequency of a semiconductor laser at 800 nm wavelength region under direct frequency shift keying (FSK) using the Rb absorption lines in this year. The better stability had already been observed in the peak-hold method in comparison with the traditional method of the unmodulated case. Therefore we investigated the stability under some different FSK conditions, i.e., some different frequency shifts and duty ratios in this year.1.We observed that the frequency stability in the peak-hold method was improved under all frequency shift conditions compared with the traditional method at duty ratio 50 per cent. The best stability was obtained at the frequency shift which was expected to be the best value by the theoretical estimation. 2.We observed that the stability obtained in the peak-hold method depended much less on the duty ratio than in the traditional method. This result means the peak-hold method is useful under the generalized modulation condition. 3.The wavelength reference point for the stabilization may be changed under the modulation in the traditional method. However, the stabilization point in the peak-hold method also depended much less on the duty ratio than in the traditional method.We investigated the peak-hold method instead of the method using the saturated absorption spectroscopy of atomic lines for the stabilization in this year. This is because we thought that the peak-hold method should be investigated thoroughly. We will investigate the better stability at the higher modulation frequency and then stabilize the wavelength by the method using the saturated absorption spectroscopy of atomic lines. The stabilization at the wavelength of 1.55 mum will be investigated in the peak-hold method, too.

今年，我们使用Rb吸收线在直接频移键控（FSK）下将半导体激光器的振荡频率稳定在800 nm波长区域。与传统的无调制情况下的方法相比，峰值保持法具有更好的稳定性。因此，我们研究了在一些不同的FSK条件下的稳定性，即，1.在占空比为50%时，峰值保持法在所有频移条件下的频率稳定度均比传统方法有所提高，在理论估计的最佳频移值处获得最佳稳定度。2.我们观察到，在峰值保持方法中获得的稳定性对占空比的依赖比传统方法小得多。这一结果表明峰值保持法在广义调制条件下是有效的。3.传统的稳定方法在调制条件下会改变稳定的波长参考点。然而，峰值保持法中的稳定点也比传统方法对占空比的依赖性小得多，我们在今年研究了峰值保持法，而不是使用原子线的饱和吸收光谱的方法来稳定。这是因为我们认为峰值保持方法应该被彻底研究。我们将研究在较高的调制频率下更好的稳定性，然后通过使用原子线的饱和吸收光谱的方法来稳定波长。在1.55妈妈的波长的稳定性将在峰值保持方法，也进行了研究。