1Kx1K Si:As IBC detector arrays for JWST MIRI and other applications

Love, Peter J.; Hoffman, Alan W.; Lum, Nancy A.; Ando, Ken; Ritchie, William D.; Therrien, Neil J.; Toth, Andrew; Holcombe, Roger S.

doi:10.1117/12.555219

Cited by 17 publications

(11 citation statements)

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“…Additionally the sensitivity of the SFD structure is low due to the high intrinsic detector capacitance in the InGaAs photodetectors. (5,6,7) The DI structure is also a very simple and power lean interface; in its most simple approach, it requires only one integrating capacitor and 2 transistors more than the SFD stage. In this circuit the bias over the detector is kept nearly As a result the only low dark current, low lag and broad application interface circuit for SWIR detectors is the CTIA interface stage; despite of its transistor count and of the higher unit cell power dissipation.…”

Section: Detector Interfacingmentioning

confidence: 99%

Low-noise, fast frame-rate InGaAs 320 x 256 FPA for hyperspectral applications

et al. 2009

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InGaAs is the material of preference for uncooled imaging in the [0.9-1.7 µm] SWIR range, as it can be manufactured on low cost InP substrates in a mainstream technology for optical telecommunications. By removing the substrate the spectral range can be extended to the [0.6 -1.7 µm] range. In this way low cost, room temperature operated FPAs cameras for imaging and hyperspectral applications can be developed. The FPA is built around a low power CTIA stage with 3 S&H capacitors in the 20*20 um 2 unit cell. This approach results in a synchronous shutter operation, which will support both ITR and IWR operation.In IWR mode the integration dead time is limited to max. 10 µsec. The CDS operation yields in a high sensitivity combined with a low noise: This presentation will focus on the development of a 20 µm pitch 320*256 device, with the following main characteristics: 20 µV/e-sensitivity and < 60 e-noise. The 4 low-power, differential outputs are enabling to drive an output load of > 30 pF at 40 Msamples/sec each, resulting in a > 1700 Hz frame rate, while at the same time the overall nominal power dissipation is < 200 mW. The ROIC is realized in a 0.35 um technology and the outputs are designed to drive directly a 3.3 V, 1.5 V VCM differential AD convertor. The circuit also supports a NDR operating mode to further reduce the noise of the FPA. A small from factor camera with Cameralink output is built around this FPA.

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Section: Detector Interfacingmentioning

confidence: 99%

Low-noise, fast frame-rate InGaAs 320 x 256 FPA for hyperspectral applications

et al. 2009

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“…At that moment the Source Follower per Detector or SFD interface becomes interesting. This interface cell (see Figure 2) has only 3 transistors per cell [7][8][9][10][11]. The reset transistor is only carrying a limited amount of current during the reset cycle of the interface; also the transistor is in the triode mode, where the electric field are low.…”

Section: \T Source Followermentioning

confidence: 99%

COUGAR: a liquid nitrogen cooled InGaAs camera for astronomy and electro-luminescence

et al. 2014

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A SWIR FPA was designed and manufactured with 640*512 pixels, 20 µm pitch and InGaAs detectors for electroluminescence characterization and astronomical applications in the [0.9 -1.55 µm] range. The FPA is mounted in a liquid nitrogen dewar and is operated by a low noise frontend electronics.One of the biggest problem in designing sensors and cameras for electro-luminescence measurements is the autoillumination of the detectors by the readout circuit. Besides of proper shielding of the detectors, the ROIC shall be optimized for minimal electrical activity during the integration time of the very-weak signals coming from the circuit under test. For this reason a SFD (or Source Follower per Detector) architecture (like in the Hawaii sensor) was selected, resulting in a background limited performance of the detector.The pixel has a (somewhat arbitrary) full well capacity of 400 000 e -and a sensitivity of 2.17 µV/e -.The dark signal is app. 1 e-/pixel/sec and with the appropriate Fowler sampling the dark noise lowers below 5 erms . The power consumption of the circuit is limited 2 mW, allowing more than 24 hours of operation on less than 1 l of liquid nitrogen. The FPA is equipped with 4 outputs (optional readout on one single channel) and is capable of achieving 3 frames per second. Due to the non-destructive readout it is possible to determine in a dynamic way the optimal integration time for each observation.The Cougar camera is equipped with ultra-low noise power supply and bias lines; the electronics contain also a 24 bit AD converter to fully exploit the sensitivity of the FPA and the camera.

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“…Two additional IR beams, represented as IRtrans in Figure 2, are used to confine the region where the particle should be during the experiment. If the particle leaves that region, it scatters light that can be detected by a chip located on the optical bench, here called detector chip [22]. In this case, the particle has to be transported back into the region of interest along the cavity mode.…”

Section: Modeling Approachmentioning

confidence: 99%

Thermal performance of a radiatively cooled system for quantum optomechanical experiments in space

Zanoni

Burkhardt

Johann

et al. 2016

Applied Thermal Engineering

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The performance of a radiatively cooled instrument is investigated in the context of optomechanical quantum experiments, where the environment of a macroscopic particle in a quantumsuperposition has to be cooled to less than 20 K in deep space. A heat-transfer analysis between the components of the instrument as well as a transfer-function analysis on thermal oscillations induced by the spacecraft interior and by dissipative sources is performed. The thermal behaviour of the instrument in an orbit around a Lagrangian point and in a highly elliptical Earth orbit is discussed. Finally, we investigate further possible design improvements aiming at lower temperatures of the environment of the macroscopic particle. These include a mirror-based design of the imaging system on the optical bench and the extension of the heat shields.

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1Kx1K Si:As IBC detector arrays for JWST MIRI and other applications

Cited by 17 publications

References 0 publications

Low-noise, fast frame-rate InGaAs 320 x 256 FPA for hyperspectral applications

Low-noise, fast frame-rate InGaAs 320 x 256 FPA for hyperspectral applications

COUGAR: a liquid nitrogen cooled InGaAs camera for astronomy and electro-luminescence

Thermal performance of a radiatively cooled system for quantum optomechanical experiments in space

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