Correlation Domain Spectroscopy by Frequency-Chirped Light

频率啁啾光的相关域光谱

基本信息

批准号：
10450031
负责人：
ITO Hiromasa
金额：
$ 9.02万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450031/
关键词：
Frequency-shifted Feedback Laser Frequency chirp Spectroscopy 相関関数

项目摘要

In this research, a new technique in spectroscopy ; correlation domain spectroscopy was studied as an application of a frequency-shifted feedback laser. The main outcomes of the research are following.1. Correlation domain spectroscopy, theory and experiment.A theoretical analysis is developed for a measurement of a impulse response of a sample by a continuous wave light. The technique was named the correlation domain spectroscopy. To demonstrate the correlation domain spectroscopy, a frequency-shifted feedback laser was used as a frequency-chirped light source, because the frequency-chirp of the laser output is highly linear. In the experiment, an impulse response of an optical fiber loop was measured. We succeeded to measure the impulse response with a temporal resolution of 5 ns. Since the technique uses the continuos wave light, it is possible to measure the materials with low optical damage threshold such as biological samples.2. Measurement of dispersion of optical fiberA frequency-shifted feedback laser with an erbium doped fiber as a gain medium. The advantage of the laser is a wide wavelength tunable range. The wavelength was tuned by varying the driving frequency of the intracavity acoustooptic modulator, and 10 nm tuning range was obtained. The another advantage is that the laser oscillates at 1.55 μm which is the wavelength of the optical communication. Combining these advantages, we have proposed and demonstrated a measurement of the group velocity dispersion and polarization mode dispersion of an optical fiber by use of the frequency-shifted feedback laser. In the experiment, the group velocity dispersion and the polarization mode dispersion were measured with resolutions of 0.1 ps/nm/km and 0.01 ps, respectively.

在这项研究中，光谱学的新技术；研究了相关域光谱，以应用频率转移激光器的应用。研究的主要结果是遵循的。1。相关域光谱，理论和实验。为通过连续波光测量样品的理论分析。该技术被命名为相关域光谱。为了证明相关域光谱，将频率变速的反馈激光用作频率的光源，因为激光输出的频率速度高度线性。在实验中，测量了光纤环的脉冲响应。我们成功地以5 ns的暂时分辨率来衡量脉冲响应。由于该技术使用连续的波灯，因此可以测量具有低光损伤阈值（例如生物学样品）的材料。2。用Erbium掺杂纤维作为增益培养基的光纤维频移反馈激光器的分散体的测量。激光的优点是可调范围宽的范围。通过改变腔内声学调节器的驱动频率来调节波长，并获得10 nm的调谐范围。另一个优点是激光以1.55μm振荡，这是光通信的波长。结合了这些优势，我们提出并证明了通过使用频率变化的反馈激光器对光纤的组速度分散和极化模式分散的测量。在实验中，分别以0.1 ps/nm/km和0.01 ps的分辨率测量组速度分散和极化模式分散体。