Phase-interrogated surface plasmon resonance sensor based on laser feedback interferometry. (June 2021)

• Record Type: Journal Article
• Authors: Kashif, Muhammad; Mokhtar, Mohd Hadri Hafiz; Azeman, Nur Hidayah; Hashim, Fazida Hanim; Arsad, Norhana; Abushagur, Abdulfatah A.G.; Bakar, Ahmad Ashrif A.
• Is Part Of: Optics and lasers in engineering. Volume 141(2021)
• Publication Date: 2021-06
• Subjects: Surface plasmon resonance -- Phase interferometry -- Laser feedback -- Mach-Zehnder interferometer -- Glycerin; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2021.106564
• Languages: English
• ISSNs: 0143-8166

Abstract

Highlights: The Phase-interrogated surface plasmon resonance (SPR) sensor performance based on the Laser feedback interferometer (LFI) technique. The performance of the LFI SPR has compared to the conventional Mach-Zehnder Interferometer (MZI) technique in terms of sensitivity, resolution, drift, and repeatability using glycerin solution as the analyte. The experiment data shows that the sensor's sensitivity is high for small Glycerin-Water concentrations. Repeatability and any change in drift can affect the performance of the SPR phase sensor. The sensitivity of the LFI SPR phase sensor is high as it can measure Glycerin concentration as low as 0.05 %. Abstract: This work reports a phase-interrogated surface plasmon resonance sensor based on a laser feedback interferometer to detect a small refractive index change. The laser feedback interferometer technique is introduced to demonstrate the sensing technique's performance, which offers several inherent advantages, such as compact, optically self-aligned, and high accuracy measurement. Moreover, this technique doubles the interrogating light beam propagation to the solution under the test, leading to an improvement of intrinsic sensitivity measurement up to two-fold. The proposed technique was characterized, and the performance was compared to another phase-interrogated surface plasmon resonance (SPR) based on the Mach-Zehnder interferometer. Laser feedback interferometer SPR has shown significant improvement to the performance parameter under test, namely sensitivity, drift, repeatability, and resolution.