Abstract

Free-space optical measurement systems can have a direct impact on evaluation systems operational in propagation paths. During propagation via optical fibers, light suffers scattering or interference, causing some output signal loss with an uncertainty outcome. Therefore, this study aims to explore the instant decisions related to the use of single- and multi-mode fiber optics and how they affect the gathering of data from high-speed optical measurement instrument links. The study also seeks to address a number of design methodology aspects and the empirical outcomes related to a surface topography measurement sensor based on fiber optics capable of surface roughness or step-height measurement. The study suggests that the Fourier transform profilometry method (FTP) can overcome the disadvantages of optical metrology sensors (e.g., bulkiness, challenging set-up, high costs, and low speed). However, despite eliminating vertical height problems, the Fourier transform profilometry (FTP) did have some shortcomings for every outcome related to core variables, including the dispersive optical fiber link sensor. The synthetic wavelength method enabled the dispersive optical fiber link sensor to calculate the vertical step height of the selected sample (1 µm). There was improved step-height repeatability, with satisfactory from 20 to 18 nm outcome improvement range. Additional investigations are necessary to establish the compatibility of single- or multi-mode optical fiber sensors with particular instruments, especially those currently preferred for embedded metrology applications.

© 2021 Optical Society of America

Synthetic wavelength to increase the snapshot optical sensor’s elevated vertical measurement ranges

Mothana A. Hassan, Haydn Martin, Liam Blunt, and Xiang Jiang
Appl. Opt. 58(33) 9051-9058 (2019)

Development of a spatially dispersed short-coherence interferometry sensor using diffraction grating orders

Mothana A. Hassan, Haydn Martin, and Xiang Jiang
Appl. Opt. 56(22) 6391-6397 (2017)

White-light interferometer with dispersion: an accurate fiber-optic sensor for the measurement of distance

Pavel Pavlíček and Gerd Häusler
Appl. Opt. 44(15) 2978-2983 (2005)

Multicascade-linked synthetic-wavelength digital holography using a line-by-line spectral-shaped optical frequency comb

Eiji Hase, Yu Tokizane, Masatomo Yamagiwa, Takeo Minamikawa, Hirotsugu Yamamoto, Isao Morohashi, and Takeshi Yasui
Opt. Express 29(10) 15772-15785 (2021)

Fiber-optic vector magnetic field sensor based on a magnetic-fluid-infiltrated large-core-offset Mach–Zehnder interferometer

Junying Zhang, Chen Tian, Zilong Guo, Xiongxing Zhang, Haibin Chen, and Wei Wang
Appl. Opt. 60(34) 10548-10554 (2021)