Probing infrared detectors through energy-absorption interferometry

Dan Moinard; Stafford Withington; Christopher N. Thomas

doi:10.1117/12.2271622

30 August 2017 Probing infrared detectors through energy-absorption interferometry

Dan Moinard, Stafford Withington, Christopher N. Thomas

Proceedings Volume 10404, Infrared Sensors, Devices, and Applications VII; 104040J (2017) https://doi.org/10.1117/12.2271622
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

We describe an interferometric technique capable of fully characterizing the optical response of few-mode and multi-mode detectors using only power measurements, and its implementation at 1550 nm wavelength. EnergyAbsorption Interferometry (EAI) is an experimental procedure where the system under test is excited with two coherent, phase-locked sources. As the relative phase between the sources is varied, a fringe is observed in the detector output. Iterating over source positions, the fringes’ complex visibilities allow the two-point detector response function to be retrieved: this correlation function corresponds to the state of coherence to which the detector is maximally sensitive. This detector response function can then be decomposed into a set of natural modes, in which the detector is incoherently sensitive to power. EAI therefore allows the reconstruction of the individual degrees of freedom through which the detector can absorb energy, including their relative sensitivities and full spatial forms. Coupling mechanisms into absorbing structures and their underlying solidstate phenomena can thus be studied, with direct applications in improving current infrared detector technology. EAI has previously been demonstrated for millimeter wavelength. Here, we outline the theoretical basis of EAI, and present a room-temperature 1550 nm wavelength infrared experiment we have constructed. Finally, we discuss how this experimental system will allow us to study optical coupling into fiber-based systems and near-infrared detectors.

Conference Presentation

Citation Download Citation

Dan Moinard, Stafford Withington, and Christopher N. Thomas "Probing infrared detectors through energy-absorption interferometry", Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040J (30 August 2017); https://doi.org/10.1117/12.2271622

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available