Multiplexed Readout for 1000-pixel Arrays of Microwave Kinetic Inductance Detectors

Understand

Microwave Kinetic Inductance Detectors (MKIDs) are the most attractive radiation detectors for far-infrared and sub-mm astronomy: They combine ultimate sensitivity with the possibility to create very large detector arrays, in excess of 10 000 pixels.

• This is possible by reading-out the arrays using RF frequency division multiplexing, which allows multiplexing ratios in excess of 1000 pixels per readout line.
• We describe a novel readout system for large arrays of MKIDs, operating in a 2 GHz band in the 4-8 GHz range.
• The readout, which is a combination of a digital front- and back-end and an analog up- and down-converter system, can read out up to 4000 detectors simultaneously with 1 kHz datarate.