Multi-wavelength tunable lasers for gas spectroscopy

用于气体光谱的多波长可调谐激光器

基本信息

批准号：
EP/I002278/1
负责人：
Ralph Tatam
金额：
$ 66.02万
依托单位：
CRANFIELD UNIVERSITY
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2010
资助国家：
英国
起止时间：
2010 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FI002278%2F1
关键词：
Multi wavelength tunable lasers gas

项目摘要

In process industry, environmental and medical applications, it can be important to measure the concentration of many gas species simultaneously and rapidly, to give real-time information. Examples include; - Measurement of combustion feedstocks and effluent gases, important in the drive for reduced carbon emissions. - Detection of hydrocarbons and hydrogen sulfide in the natural gas industry and biogas generation industries - Detection of toxic species in industry, such as ammonia and hydrogen fluoride - Breath gas diagnostics, to diagnose and anage diseases such as asthma, diabetes, renal disease, cystic fibrosis and others. - Measuring short-lived gas species, to improve urban air quality and understand important atmospheric processes affecting climate change. These activities present a significant measurement problem to industrial users. Industrial gas detection is dominated by complex and expensive laboratory equipment with sampling that precludes real-time measurement and can even affect the composition of the sample through condensation and / or reaction in the sample pipework. Small ultra-low-cost devices are also available, however these do not offer the stability nor the gas species specificity needed for industrial applications. Many gases of interest absorb light at specific and characteristic wavelengths in the near infrared region of the spectrum (1.3 - 2.5 microns). Using a suitable laser source whose emission is at known and controlled wavelengths, this property forms the basis of a powerful method to detect gases and measure their concentrations.Our new approach to optical gas detection, based on development of a new class of optical sources, will enable both multi-species detection as well as detection of unstable species, both of which are difficult to impossible with existing technology. Demonstration of these sources will initially include detection of hydrocarbons, carbon dioxide and carbon monoxide, then lead on to measurement of unstable species such as hydrogen sulfide and ammonia..

在过程工业、环境和医疗应用中，同时快速测量多种气体的浓度以提供实时信息非常重要。例子包括： - 燃烧原料和废气的测量，对于减少碳排放非常重要。 - 天然气工业和沼气发电工业中碳氢化合物和硫化氢的检测 - 工业中有毒物质的检测，例如氨和氟化氢 - 呼吸气体诊断，用于诊断和治疗疾病，例如哮喘、糖尿病、肾病、囊肿等纤维化等。 - 测量短寿命气体种类，以改善城市空气质量并了解影响气候变化的重要大气过程。这些活动给工业用户带来了重大的测量问题。工业气体检测以复杂且昂贵的实验室设备为主，其采样无法进行实时测量，甚至可能通过样品管道中的冷凝和/或反应影响样品的成分。小型超低成本设备也是可用的，但是这些设备不能提供工业应用所需的稳定性和气体种类特异性。许多感兴趣的气体吸收光谱近红外区域（1.3 - 2.5 微米）内特定和特征波长的光。使用发射波长已知且受控的合适激光源，这一特性构成了检测气体并测量其浓度的强大方法的基础。我们的光学气体检测新方法基于新型光源的开发，将能够实现多物种检测以及不稳定物种的检测，这两者在现有技术下是很难甚至不可能的。这些来源的演示首先包括检测碳氢化合物、二氧化碳和一氧化碳，然后测量硫化氢和氨等不稳定物质。