AI Article Synopsis
- The study examined how quadrature phase shifts affect displacement errors using a two-detector polarizing homodyne laser interferometer with a specialized detection system.
- Common nonlinear errors, particularly phase-shift errors, were identified and successfully addressed using a robust data-processing algorithm.
- The findings, including the systematic and periodic nature of the errors, provide insights that can help enhance the accuracy of various displacement-measuring devices that utilize phase-quadrature detection.
Article Abstract
The influence of quadrature phase shift on the measured displacement error was experimentally investigated using a two-detector polarizing homodyne laser interferometer with a quadrature detection system. Common nonlinearities, including the phase-shift error, were determined and effectively corrected by a robust data-processing algorithm. The measured phase-shift error perfectly agrees with the theoretically determined phase-shift error region. This error is systematic, periodic and severely asymmetrical around the nominal displacement value. The main results presented in this paper can also be used to assess and correct the detector errors of other interferometric and non-interferometric displacement-measuring devices based on phase-quadrature detection.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.17.016322 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An Approach to Reduce Tuning Sensitivity in the PIC-Based Optoelectronic Oscillator by Controlling the Phase Shift in Its Feedback Loop.
Micromachines (Basel)
December 2024
Research Laboratory "Sensor Systems Based on Integrated Photonics Devices", Ufa University of Science and Technology, 32, Z. Validi St., Ufa 450076, Russia.
Radio photonic technologies have emerged as a promising solution for addressing microwave frequency synthesis challenges in current and future communication and sensing systems. One particularly effective approach is the optoelectronic oscillator (OEO), a simple and cost-effective electro-optical system. The OEO can generate microwave signals with low phase noise and high oscillation frequencies, often outperforming traditional electrical methods.
View Article and Find Full Text PDFDesign and Implementation of a Binary Phase-Shift Keying Frequency Diverse Array: Considerations and Challenges.
Sensors (Basel)
January 2025
Applied Research Laboratory, The Pennsylvania State University, State College, PA 16801, USA.
The frequency diverse array (FDA) is an architecture capable of beamforming in both range and angle, improving upon the traditional phased array (PA) which can only achieve beamforming in angle. The FDA employing directional modulation (DM) for secure directional communications (SDC) can reduce bit error rates (BERs) in both range and angle, again improving upon the traditional PA which can only reduce BER in angle. In this paper, we document the challenges involved in the design and implementation of a two-element linear FDA employing fast-time binary phase-shift keying (BPSK) modulations.
View Article and Find Full Text PDFUltrasonic detection of wrinkles in composites with gradual phase shift migration.
Ultrasonics
December 2024
School of Mechatronic & Automation Engineering, Shanghai University, Shanghai 200444, China; Key Laboratory of Silicate Cultural Relics Conservation (Shanghai University), Ministry of Education, China. Electronic address:
Fiber reinforced polymer composites (FRPs) are essential for various industrial fields, but wrinkles inside will greatly reduce their mechanical properties. Full-matrix capture (FMC) is a popular data structure for ultrasonic phased array imaging in composites. However, such structure may lead to data redundancy and noise interference.
View Article and Find Full Text PDFWe experimentally demonstrate a cost-effective dual-polarization quadrature phase shift keying (DP-QPSK) coherent passive optical network (PON) system that operates at 100 Gbits/s/λ. This system utilizes distributed feedback lasers (DFBs) and a carrier recovery algorithm facilitated by a bifunctional frequency-domain pilot tone (FPT). To reduce costs in coherent PON implementations, low-cost DFBs are employed as the sole light sources, replacing the more expensive external cavity lasers (ECLs) at both the optical line terminal (OLT) and the optical network units (ONUs).
View Article and Find Full Text PDFWe propose a surface-normal dual-polarization in-phase and quadrature modulator (DP-IQM) that employs a thin dielectric metasurface (MS) layer inserted on a high-speed electro-absorptive modulator array. The metasurface provides the functionalities of all the passive components necessary for a DP-IQM, including a polarization beam splitter/combiner and an interferometric circuit, to a normal-incident beam. A dielectric metasurface composed of silicon nanoposts is designed and fabricated to experimentally demonstrate polarization and beam splitting functionalities with a phase error of less than 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!