基于 BS 结构的太赫兹光谱数据库的设计与实现

摘要

With the solution of key scientific and technical problems and development of instrumentation,the application of tera-hertz technology in various fields has been paid more and more attention.Owing to the unique characteristic advantages,tera-hertz technology has been showing a broad future in the fields of fast,non-damaging detections,as well as many other fields. Terahertz technology combined with other complementary methods can be used to cope with many difficult practical problems which could not be solved before.One of the critical points for further development of practical terahertz detection methods de-pends on a good and reliable terahertz spectral database.We developed a BS (browser/server)-based terahertz spectral database recently.We designed the main structure and main functions to fulfill practical requirements.The terahertz spectral database now includes more than 240 items,and the spectral information was collected based on three sources:(1)collection and citation from some other abroad terahertz spectral databases;(2)collected from published literatures;and (3)spectral data measured in our laboratory.The present paper introduced the basic structure and fundament functions of the terahertz spectral database de-veloped in our laboratory.One of the key functions of this THz database is calculation of optical parameters.Some optical pa-rameters including absorption coefficient,refractive index,etc.can be calculated based on the input THz time domain spectra. The other main functions and searching methods of the browser/server-based terahertz spectral database have been discussed. The database search system can provide users convenient functions including user registration,inquiry,displaying spectral fig-ures and molecular structures,spectral matching,etc.The THz database system provides an on-line searching function for reg-istered users.Registered users can compare the input THz spectrum with the spectra of database,according to the obtained cor-relation coefficient one can perform the searching task very fast and conveniently.Our terahertz spectral database can be accessed at http://www.teralibrary.com.The proposed terahertz spectral database is based on spectral information so far,and will be improved in the future.We hope this terahertz spectral database can provide users powerful,convenient,and high efficient func-tions,and could promote the broader applications of terahertz technology.%随着太赫兹技术中关键科学与技术问题的解决和有关仪器发展，其在各个领域的应用也备受人们的关注。由于太赫兹光谱技术具有一些独特优势，在快速无损检测技术的发展方面具有重要的应用前景，该技术与其他方法互补，可以解决许多原来难以解决的检测问题。进一步开发太赫兹光谱技术实际检测方法的关键之一就是需要具有一套较为完整和可靠的太赫兹光谱数据库。介绍了近期开发的一个基于浏览器／服务器（Browser／Server）的太赫兹光谱数据库系统。根据实际需要设计了太赫兹光谱数据库的结构和主要功能。该数据库目前包括240多条太赫兹光谱信息，其数据来源包括三个部分：（1）收集了部分国外太赫兹光谱数据库的信息；（2）从文献中收集部分光谱数据；（3）国内部分实验室测量的太赫兹光谱数据。着重介绍了建立 BS 结构的太赫兹数据库的基本结构和项目，介绍了 BS 结构太赫兹光谱数据库的功能与检索方法。该数据库具有计算样品的光学参数功能，可以根据输入的太赫兹时域光谱数据计算出样品的吸收系数，折射率等其他光学参数，以便于样品特征研究和谱库检索。检索系统能方便的提供注册用户收集、查询、显示谱图及其实验数据和分子结构图、数据匹配等功能。该数据库可以登录 http：／／www．teralibrary．com 进行查询和使用。该数据库是根据目前的太赫兹光谱数据信息建立的，以后会逐渐完善。希望该太赫兹光谱数据库能够为用户提供强大、方便和高效的服务功能，进而推进太赫兹技术在更多领域的应用。