Novel low cost electronically tunable external cavity laser for high resolution spectroscopy

外腔二极管激光器（ECDL）可以取代科学和商业应用中更复杂的激光器，例如高分辨率光谱学，但目前ECDL使用的机械波长调谐方法从根本上限制了其调谐范围（灵活性）和分辨率（线宽），并禁止同步多波长操作。缓解措施增加了显著的复杂性和成本。2 TP已经确定了一个机会，使用相位全息创建一个没有这些限制的ECDL，创建一个价值阶跃变化。2 TP的项目将证明一个上级可调ECDL的技术，将为用户提供更好的性能和可负担性，从而为2 TP赢得市场份额。为了交付拟议的项目，2 TP将需要解决以下领域的挑战：·化学-研究液晶化学和气体吸收线的光谱建模·物理-建模，使用高分辨率滤波器和低成本激光器进行实验·软件-使用遗传算法控制ECDL操作·集成-制造和测试方面的技术该项目将提供：a.一种无机械运动部件的可寻址高分辨率波长选择滤波器电子控制的软件可重构技术将在结构上简单，具有多波长同步操作能力。低成本、高分辨率、宽调谐范围的ECDL，能够进行多物种检测.基于上述a）和B）的多气体检测技术演示器。

External Cavity Diode Lasers (ECDL) can replace the more complex lasers in scientific &commercial applications e.g. high resolution spectroscopy but the mechanical wavelengthtuning approach used by current ECDLs fundamentally restricts their tuning range (flexibility)and resolution (linewidth) and prohibits synchronous multi-wavelength operation. Mitigationmeasures add significant complexity & cost. 2TP has identified an opportunity to use phaseonlyholography create an ECDL without these limitations, creating a value step change. 2TPsproject will prove enabling technologies for a superior tunable ECDL that will offer improvedperformance & affordability for the user, thus capturing market share for 2TP.To deliver the proposed project 2TP will need to address challenges in the areas of:• Chemistry –research liquid crystal chemistries & spectral modelling of gas absorptionlines• Physics – modelling, experiments with high resolution filter & low cost lasers• Software – use of genetic algorithms to control ECDL operation• Integration – manufacture and test aspects of the technologyThe project will deliver:a. An addressable high resolution wavelength selectable filter with no mechanicallymoving parts The electronically controlled, software reconfigurable technology will be simplein construction with multi-wavelength synchronous operation capability.b. A low cost, high resolution ECDL with a wide tuning range, capable of multi-speciesdetection.c. A multi-gas detection technology demonstrator based on a) and b) above.