Multiplexed readout of kinetic inductance bolometer arrays

25 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Detector readout, signal processing, and related technologies Poster session

Speaker

Dr Juho Luomahaara (VTT Technical Research Centre of Finland, QTF Centre of Excellence)

Description

Kinetic inductance bolometer represents a sensor technology that can be scaled into large 2D detector arrays. Such detector arrays are attractive for passive sub-millimeter and terahertz imaging systems, providing mechanical simplicity and good-enough imaging capability for terrestrial imaging. We have previously reported on the successful implementation of an imaging system containing a focal plane array equipped with thousands of pixels, optics system and cryogenics operating above 5 K. Here we present a new multiplexing scheme capable of reading the whole detector array with only a modest noise penalty. The readout is called serial addressed frequency excitation (SAFE) as it combines features from both time-domain and frequency-domain multiplexing (FDM) schemes. As a result, the readout is substantially simplified compared to the full FDM case where expensive high-speed digital electronics would be needed. After introducing the readout concept, we describe our implementation of it and show experimental results that verify its performance. Furthermore, video imagery of human subjects at a stand-off of a few meters is presented.

Less than 5 years of experience since completion of Ph.D Y
Student (Ph.D., M.Sc. or B.Sc.) N

Primary authors

Dr Juho Luomahaara (VTT Technical Research Centre of Finland, QTF Centre of Excellence) Mr Hannu Sipola (VTT Technical Research Centre of Finland, QTF Centre of Excellence) Dr Andrey Timofeev (VTT Technical Research Centre of Finland, QTF Centre of Excellence) Mr Leif Grönberg (VTT Technical Research Centre of Finland, QTF Centre of Excellence) Mr Anssi Rautiainen (Asqella Oy) Dr Arttu Luukanen (Asqella Oy) Dr Elena Saenz (ESA European Space Agency, ESTEC) Dr Juha Hassel (VTT Technical Research Centre of Finland, QTF Centre of Excellence)

Presentation Materials