Work

Robust integrated optical feedback interferometry via variable optical attenuation

Year: 2025

Type: article

Abstract: Robust operation of optical feedback interferometry-based instruments requires controlling the amount of light that is reflected back into the laser. To this end, here we propose an on-chip optical feedback interferometry system with an integrated variable optical attenuator. We develop what we believe to be a novel analytical model for this system, and using a realistic variable optical attenuator design, we show that it can provide high precision displacement measurements in a wide range of the feedback parameter 2 < C < 100 for target distances up to a few centimeters. This paves the way towards short-distance applications in which reflections change significantly, such as the characterization of micro-electro-mechanical systems.

Source: Optics Express

DOI: 10.1364/oe.550127

Authors: Ayesha Arshad, Usman Zabit, Olivier Bernal, Clement Deleau, Robert Halir

Institutions: Université de Toulouse, Instituto de Investigación Biomédica de Málaga, Universidad de Málaga

Language: English

Topic: Semiconductor Lasers and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Agence Nationale de la Recherche