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首页> 外文期刊>Laser Focus World: The Magazine for the Photonics & Optoelectronics Industry >SWEPT-WAVELENGTH LASERS: Akinetic all-semiconductor swept lasers boost OCT image quality
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SWEPT-WAVELENGTH LASERS: Akinetic all-semiconductor swept lasers boost OCT image quality

机译:扫描波长激光:全动态扫描半导体激光器可提高OCT图像质量

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摘要

Optical coherence tomography (OCT) image quality continues to improve thanks to advances in detection systems and improved light sources such as wavelength-tunable vertical-cavity surface-emitting lasers (VCSELs). But a different light source that eliminates the mechanical tuning of VCSEL and external-cavity lasers is rapidly gaining momentum, as it could offer superior OCT image quality and potentially lower-cost manufacture: akinetic all-semiconductor swept laser sources from Insight (Lafayette, CO). Nearly all swept-wavelength light sources use mechanical means to move optical filter elements or microelectromechanical systems (MEMS) mirrors to tune the output wavelength; unfortunately, these mechanical elements can exhibit hysteresis, cause cavity instabilities, or introduce extraneous reflections that produce noise and limit OCT imaging quality in swept-source OCT (SS-OCT) systems. Akinetic means "absence of movement"; an all-semiconductor akinetic laser is electrically tuned--the only moving parts are photons and electrons.
机译:光学相干断层扫描(OCT)图像质量不断提高,这要归功于检测系统的进步和改进的光源,例如波长可调的垂直腔面发射激光器(VCSEL)。但是另一种消除VCSEL和外腔激光器的机械调谐的光源正在迅速获得发展动力,因为它可以提供卓越的OCT图像质量和潜在的低成本制造:Insight(拉斐特,CO)的全动态半导体扫描激光光源)。几乎所有的扫描波长光源都使用机械手段来移动滤光器元件或微机电系统(MEMS)镜来调整输出波长。不幸的是,这些机械元件可能会出现滞后现象,导致腔体不稳定性,或者引入多余的反射,从而产生噪声并限制扫频OCT(SS-OCT)系统中的OCT成像质量。运动的意思是“缺乏运动”;对全半导体运动激光器进行电调谐-仅有的运动部件是光子和电子。

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