用于印度初级压力标准的基于激光的光学干涉仪压力计设计
Laser based optical interferometer manometer design for primary pressure standard in India
AI总结：
针对帕斯卡单位复现需求，本文开展了基于激光的光学干涉仪压力计相关研究，完成光学腔理论计算、激光参数分析及双腔与全光纤装置设计，服务于印度下一代初级压力标准建设。
摘要：
压力的国际单位制单位，即帕斯卡（Pascal），目前通过超声干涉仪压力计、压力天平等机械装置在1 Pa至100 kPa的压力范围内复现。近年来，光学干涉仪压力计开始被用于复现帕斯卡。这种复现方式无汞、环境友好，且不像活塞式压力计那样依赖任何机械运动，其原理基于物理常数。该装置包含一个作为折射计的光学Fabry-Perot（法布里-珀罗）腔，核心是利用激光测量腔体的谐振频率。本文中，我们报告了此类光学腔体的理论计算结果，并讨论了开发这类基于腔体的折射计系统所需激光的各类参数。我们还提出了双腔体的机械设计以及全光纤光学装置方案，该方案将用于印度CSIR-国家物理实验室气压区域下一代初级压力标准的搭建。
英文摘要：
The SI unit of pressure, i.e. Pascal is realized with mechanical devices such as ultrasonic interferometer manometers and pressure balances for the pressure range 1 Pa to 100 kPa. Recently, optical interferometer manometers are being used to realize Pascal. Such a realization is mercury-free and environmentally friendly and does not depend on any mechanical motions as in piston gauges and is based on physical constants. It consists of an optical Fabry-Perot cavity as a refractometer and is based on the measurement of the resonant frequency of the cavity using lasers. In this paper, we report the theoretical calculations for such an optical cavity and discuss various parameters for the laser required for developing such a cavity-based refractometer system. We present the mechanical design for the dual cavity and an all-fiber optical set-up to be used for the next generation of primary pressure standards in the barometric region of pressure at CSIR-National physical laboratory, India.
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