Self-mixing imaging using a terahertz quantum cascade amplifier

We demonstrate a terahertz imaging system utilizing self-mixing in a 2.9 THz quantum cascade amplifier, through the use of an anti-reflection coated silicon lens to completely suppress lasing action. The fully exploited optical gain of the quantum cascade amplifier allows induced voltage perturbatio...

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Bibliographic Details
Main Authors: Wallis, Robert, Yuan Ren, Jessop, David S., Degl'Innocenti, Riccardo, Klimont, Adam, Beere, Harvey E., Ritchie, David A.
Format: Conference Proceeding
Language:English
Subjects:
Amplification
Amplifiers
Cascades
Imaging
Induced voltage
Lasing
Lenses
Noise levels
Optical feedback
Quantum cascade lasers
Silicon
Voltage measurement
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Summary:We demonstrate a terahertz imaging system utilizing self-mixing in a 2.9 THz quantum cascade amplifier, through the use of an anti-reflection coated silicon lens to completely suppress lasing action. The fully exploited optical gain of the quantum cascade amplifier allows induced voltage perturbations to be spatially mapped with a signal to noise ratio of up to 55 dB and an acquisition rate of up to 20,000 pixels per second.
ISSN:2162-2027
2162-2035
DOI:10.1109/IRMMW-THz.2015.7327686