A simple single-fiber (SF) Mach-Zehnder interferometer (MZI) based technique for identifying any known/unknown organic/inorganic substance, has been proposed. The suggested process involves the quantification of the contribution of tapered and un-tapered sections of SF-MZI in its optical interference length by modifying the existing expression of its free spectral range (FSR). Each chemical/biological material/entity, possesses specific properties and the proposed method aims to enumerate the characteristic features of the material with a particular identification number. A dual tapered fiber based SF-MZI is employed for sensing four types of chemical compounds by submerging the tapered fibers with varied concentrations of the compounds. The effect of systematic alteration in refractive index (RI) of surrounding of the tapered fibers results in blue shift in the spectrum recorded on optical spectrum analyzer (OSA). The experimental spectral shift is correlated, within the unveiled theoretical framework, with variation in RI for determining the sensitivity, optical interference length of tapered and un-tapered region, and the unique identification parameter for each compound. The presented framework shall be useful in developing an integrated method for sensing various chemical and biological entities.

已经提出了一种基于简单单纤维（SF）马赫曾德尔干涉仪（MZI）的技术来识别任何已知/未知的有机/无机物质。建议的过程涉及通过修改其自由光谱范围（FSR）的现有表达来量化SF-MZI的锥形和非锥形部分在其光学干涉长度中的贡献。每种化学/生物材料/实体都具有特定的特性，并且所提出的方法旨在枚举具有特定标识号的材料的特征。基于双锥形纤维的SF-MZI用于通过将锥形纤维浸入各种浓度的化合物来感测四种类型的化合物。逐渐变细的锥形纤维周围折射率（RI）的影响导致在光谱分析仪（OSA）上记录的光谱中出现蓝移。在揭示的理论框架内，实验光谱偏移与RI的变化相关，以确定敏感度，锥形和非锥形区域的光学干涉长度以及每种化合物的唯一识别参数。所提出的框架在开发用于感测各种化学和生物实体的综合方法中将是有用的。以及每种化合物的唯一识别参数。所提出的框架在开发用于感测各种化学和生物实体的综合方法中将是有用的。以及每种化合物的唯一识别参数。所提出的框架在开发用于感测各种化学和生物实体的综合方法中将是有用的。