|
| 用于激光频率参数测量的飞秒光学频率梳 |
| Femtosecond optical frequency comb for measuring laser frequency parameters |
| 投稿时间：2023-08-12 修订日期：2024-04-17 |
| DOI： |
| 中文关键词: 光学频率梳 频率测量 拍频 稳定度 线宽 绝对频率 |
| 英文关键词:optical frequency comb optical frequency measurement beat note frequency instability optical linewidth absolute optical frequency |
| 基金项目:国家重点研发计划，自然科学基金 |
|
|
|
|
| 摘要点击次数: 10 |
| 全文下载次数: 0 |
| 中文摘要: |
| 近年来随着光纤制造技术和飞秒激光技术的成熟，以掺铒（Er）光纤光学频率梳为代表的频率梳技术，逐步突破了光学频率测量领域，在长度测量、精密光谱分析、超低相位噪声微波频率产生、精密时间频率传递、温度测量等领域发挥出越来越重要的作用，已成为许多高端科研领域的基础性工具。但飞秒光学频率梳所解决的重要问题是对激光频率进行测量。本文主要面向激光频率参数测量的需求，研制基于掺Er光纤飞秒激光器的光学频率梳，在实现光学频率梳稳定运转的前提下，通过非线性光学频率变换技术，实现光谱范围从掺Er光纤光学频率梳的中心波长向各个待测激光波长的转换，并完成与多个不同波长激光的拍频信号探测。目前已验证的飞秒光梳可测频率范围：500-2000 nm；频率稳定度和准确度：10-16量级；线宽：Hz量级。该指标满足了激光频率特性参数测量的需求，为激光绝对频率、频率漂移、线宽等参数的测量提供了基础性的测量工具。 |
| 英文摘要: |
| In recent years, with the rapid development of fiber manufacturing technology and femtosecond laser technology, femtosecond optical frequency combs (FOFCs) represented by Er-FOFCs have gradually advanced the field of optical frequency measurement. They are playing an increasingly important role in length measurement, precision spectral analysis, ultra-low phase noise microwave frequency generation, precision time-frequency transfer, temperature measurement, and many other fields, and have become an important fundamental tool in high-end scientific research. But the important problem to be solved by the FOFCs is to measure the optical frequency. This paper mainly focuses on the demand for measuring optical frequency parameters. An optical frequency comb based on a Er-doped fiber femtosecond laser has been developed. With the stable operation of the Er-FOFC, nonlinear optical frequency conversion is used to transfer the spectrum from the central wavelength of the Er-FOFC to other wavelengths. The beat note between the broadened spectrum in the Er-FOFC and the measured laser is detected. The Er-FOFC has a spectral range of 500-2000 nm, a frequency instability and accuracy of the level of 10-16, and a Hz-level comb tooth linewidth. These parameters meet the requirement for measuring laser frequency. The reported Er-FOFC provides a fundamental measurement tool for optical frequency, frequency drift, frequency linewidth, and other parameters. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
var reg=new RegExp("最后修改时间","g");
var stringObj=self.document.body.innerHTML;
var newstr=stringObj.replace(reg,"在线录用时间");
self.document.body.innerHTML=newstr;
|
|
