Mr. Robert Olah Profile

Robert Olah

at Banpil Photonics Inc

SPIE Involvement:

Author

Proceedings Article | 26 May 2016 Paper

High performance digital read out integrated circuit (DROIC) for infrared imaging

Genki Mizuno, Robert Olah, Patrick Oduor, Achyut Dutta, Nibir Dhar

Proceedings Volume 9854, 985409 (2016) https://doi.org/10.1117/12.2230573

KEYWORDS: Analog electronics, Infrared imaging, Imaging systems, Infrared cameras, Cameras, Staring arrays, Readout integrated circuits, Capacitors, Field programmable gate arrays, Amplifiers

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Banpil Photonics has developed a high-performance Digital Read-Out Integrated Circuit (DROIC) for image sensors and camera systems targeting various military, industrial and commercial Infrared (IR) imaging applications. The on-chip digitization of the pixel output eliminates the necessity for an external analog-to-digital converter (ADC), which not only cuts costs, but also enables miniaturization of packaging to achieve SWaP-C camera systems. In addition, the DROIC offers new opportunities for greater on-chip processing intelligence that are not possible in conventional analog ROICs prevalent today. Conventional ROICs, which typically can enhance only one high performance attribute such as frame rate, power consumption or noise level, fail when simultaneously targeting the most aggressive performance requirements demanded in imaging applications today. Additionally, scaling analog readout circuits to meet such requirements leads to expensive, high-power consumption with large and complex systems that are untenable in the trend towards SWaP-C. We present the implementation of a VGA format (640x512 pixels 15μm pitch) capacitivetransimpedance amplifier (CTIA) DROIC architecture that incorporates a 12-bit ADC at the pixel level. The CTIA pixel input circuitry has two gain modes with programmable full-well capacity values of 100K e- and 500K e-. The DROIC has been developed with a system-on-chip architecture in mind, where all the timing and biasing are generated internally without requiring any critical external inputs. The chip is configurable with many parameters programmable through a serial programmable interface (SPI). It features a global shutter, low power, and high frame rates programmable from 30 up 500 frames per second in full VGA format supported through 24 LVDS outputs. This DROIC, suitable for hybridization with focal plane arrays (FPA) is ideal for high-performance uncooled camera applications ranging from near IR (NIR) and shortwave IR (SWIR) to mid-wave IR (MWIR) and long-wave IR (LWIR) spectral bands.

Proceedings Article | 18 May 2015 Paper

High efficiency c-Si solar cells utilizing light-trapping phenomenon

Anil Shrestha, Genki Mizuno, Patrick Oduor, Robert Olah, Saif Islam, Achyut Dutta, Nibir Dhar

Proceedings Volume 9493, 94930E (2015) https://doi.org/10.1117/12.2183411

KEYWORDS: Solar cells, Absorption, Silicon, Interfaces, Polymers, Antireflective coatings, Nanostructures, Reflection, Standards development, Nanowires

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Proceedings Article | 13 May 2015 Paper

Development of high performance SWIR InGaAs focal plane array

Richie Nagi, Jeremy Bregman, Genki Mizuno, Patrick Oduor, Robert Olah, Achyut Dutta, Nibir Dhar

Proceedings Volume 9481, 948105 (2015) https://doi.org/10.1117/12.2181155

KEYWORDS: Photodiodes, Sensors, Short wave infrared radiation, Indium gallium arsenide, Staring arrays, Photonics, Diffusion, Quantum efficiency, Photodetectors, Diodes

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Banpil Photonics has developed a novel InGaAs based photodetector array for Short-Wave Infrared (SWIR) imaging, for the most demanding security, defense, and machine vision applications. These applications require low noise from both the detector and the readout integrated circuit arrays. In order to achieve high sensitivity, it is crucial to minimize the dark current generated by the photodiode array. This enables the sensor to function in extremely low light situations, which enables it to successfully exploit the benefits of the SWIR band. In addition to minimal dark current generation, it is essential to develop photodiode arrays with higher operating temperatures. This is critical for reducing the power consumption of the device, as less energy is spent in cooling down the focal plane array (in order to reduce the dark current). We at Banpil Photonics are designing, simulating, fabricating and testing SWIR InGaAs arrays, and have achieved low dark current density at room temperature. This paper describes Banpil’s development of the photodetector array. We also highlight the fabrication technique used to reduce the amount of dark current generated by the photodiode array, in particular the surface leakage current. This technique involves the deposition of strongly negatively doped semiconductor material in the area between the pixels. This process reduces the number of dangling bonds present on the edges of each pixel, which prevents electrons from being swept across the surface of the pixels. This in turn drastically reduces the amount of surface leakage current at each pixel, which is a major contributor towards the total dark current. We present the optical and electrical characterization data, as well as the analysis that illustrates the dark current mechanisms. Also highlighted are the challenges and potential opportunities for further reduction of dark current, while maintaining other parameters of the photodiode array, such as size, weight, temperature of peak performance (lowest dark current), and power consumption.

Proceedings Article | 7 February 2015 Paper

High performance broadband photodetector and its array for optical communication

Jeremy Bregman, Richie Nagi, Robert Olah, Patrick Oduor, Achyut Dutta

Proceedings Volume 9388, 93880Q (2015) https://doi.org/10.1117/12.2084946

KEYWORDS: Photodiodes, Photodetectors, Optical communications, Diffusion, Quantum efficiency, Sensors, Photonics, Diodes, Optical arrays, Optical interconnects

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Proceedings Article | 11 June 2014 Paper

Effect of dense planer focal plane array on device performances

Tony Lin, Robert Olah, Achyut Dutta

Proceedings Volume 9100, 91000K (2014) https://doi.org/10.1117/12.2058154

KEYWORDS: Staring arrays, Diodes, Doping, Diffusion, Resistance, Instrument modeling, Indium gallium arsenide, Photons, Device simulation, Sensors

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Proceedings Article | 11 June 2014 Paper

Development of low-cost high-performance multispectral camera system at Banpil

Patrick Oduor, Genki Mizuno, Robert Olah, Achyut Dutta

Proceedings Volume 9100, 910006 (2014) https://doi.org/10.1117/12.2058153

KEYWORDS: Cameras, Imaging systems, Staring arrays, Readout integrated circuits, Short wave infrared radiation, Image sensors, Indium gallium arsenide, Semiconducting wafers, Multispectral imaging, Integrated optics

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Proceedings Article | 10 May 2012 Paper

Small form-factor ultraviolet laser source

Robert Olah, Eugene Anoikin, Achyut Dutta

Proceedings Volume 8388, 838807 (2012) https://doi.org/10.1117/12.924735

KEYWORDS: Ultraviolet radiation, Crystals, Nonlinear crystals, Second-harmonic generation, Harmonic generation, Laser sources, Laser crystals, Ferroelectric materials, Neodymium lasers, Superlattices

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Proceedings Article | 28 January 2012 Paper

Optimization of broadband detector for optical communication: design-simulation and fabrication

Andrew Lange, Robert Olah, Achyut Dutta, Nibir Dhar

Proceedings Volume 8283, 82830B (2012) https://doi.org/10.1117/12.915788

KEYWORDS: Sensors, Diffusion, Absorption, Indium gallium arsenide, Optical communications, Modulation, Photodetectors, Silicon, Interfaces, Infrared sensors

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Proceedings Article | 24 May 2011 Paper

Ultraviolet photodetectors directly integrated on CMOS using low-temperature ZnO-based nanowire techniques

Robert Olah, Achyut Dutta, Deli Wang, Tariq Manzur

Proceedings Volume 8046, 80460M (2011) https://doi.org/10.1117/12.888013

KEYWORDS: Zinc oxide, Absorption, Magnesium, Silicon, Sensors, Thin films, Zinc, Ultraviolet radiation, Photodetectors, Nanowires

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Proceedings Article | 18 May 2011 Paper

Perpetual harvesting device electronics

Robert Olah, Genki Mizuno, Achyut Dutta, Nibir Dhar

Proceedings Volume 8035, 80350U (2011) https://doi.org/10.1117/12.887443

KEYWORDS: Solar energy, Electronics, Wind energy, Energy harvesting, Light emitting diodes, Infrared radiation, Control systems, Thermography, Prototyping, Oscillators

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Proceedings Article | 17 May 2011 Paper

Design and simulation of infrared energy harvesting devices

Vijay Parameshwaran, Robert Olah, Achyut Dutta, Nibir Dhar

Proceedings Volume 8035, 80350L (2011) https://doi.org/10.1117/12.887444

KEYWORDS: Energy harvesting, Mercury cadmium telluride, Black bodies, Diffusion, Solar energy, Absorption, Infrared radiation, Infrared imaging, Photovoltaics, Semiconductors

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Proceedings Article | 25 January 2011 Paper

Novel multicolor photodetectors for short- and long-distance optical communication

Achyut Dutta, Robert Olah, Genki Mizuno, Nibir Dhar

Proceedings Volume 7959, 795906 (2011) https://doi.org/10.1117/12.881179

KEYWORDS: Photodetectors, Sensors, Absorption, Indium gallium arsenide, Optical communications, Quantum efficiency, Semiconducting wafers, Ultraviolet radiation, Telecommunications, Silicon

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Proceedings Article | 5 May 2010 Paper

Ultra-high sensitivity CO-sensor based on nanocrystalline metal oxide gate AlGaN/GaN heterostructure

Sazia Eliza, Robert Olah, Achyut Dutta

Proceedings Volume 7679, 76790R (2010) https://doi.org/10.1117/12.852727

KEYWORDS: Carbon monoxide, Sensors, Oxides, Field effect transistors, Platinum, Heterojunctions, Gallium nitride, Absorption, Metals, Polarization

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Proceedings Article | 5 May 2010 Paper

A distributed sensor system for detection of toxic and hazardous gases

Sazia Eliza, Robert Olah, Achyut Dutta

Proceedings Volume 7666, 76662W (2010) https://doi.org/10.1117/12.852796

KEYWORDS: Sensors, Hydrogen, Carbon monoxide, Field effect transistors, Platinum, Gases, Gallium nitride, Interfaces, Distributed computing, Toxic gases

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Proceedings Article | 29 April 2010 Paper

High-efficiency solar cells based on micro-nano scale structures

Achyut Dutta, Robert Olah, Genki Mizuno, Rabi Sengupta, Jin-Hong Park, Priyalal Wijewarnasuriya, Nibir Dhar

Proceedings Volume 7683, 76830O (2010) https://doi.org/10.1117/12.855610

KEYWORDS: Solar cells, Silicon, Absorption, Solar energy, Semiconductors, Thin films, Thin film solar cells, Manufacturing, Crystals, Standards development

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Showing 5 of 15 publications

Conference Committee Involvement (15)

Image Sensing Technologies: Materials, Devices, Systems, and Applications IV

12 April 2017 | Anaheim, CA, United States

Image Sensing Technologies: Materials, Devices, Systems, and Applications III

20 April 2016 | Baltimore, MD, United States

Energy Harvesting and Storage: Materials, Devices, and Applications VII

19 April 2016 | Baltimore, MD, United States

Image Sensing Technologies: Materials, Devices, Systems, and Applications II

22 April 2015 | Baltimore, MD, United States

Energy Harvesting and Storage: Materials, Devices, and Applications VI

21 April 2015 | Baltimore, MD, United States

Image Sensing Technologies: Materials, Devices, Systems, and Applications

7 May 2014 | Baltimore, MD, United States

Energy Harvesting and Storage: Materials, Devices, and Applications V

5 May 2014 | Baltimore, MD, United States

Energy Harvesting and Storage: Materials, Devices, and Applications IV

29 April 2013 | Baltimore, Maryland, United States

Energy Harvesting and Storage: Materials, Devices, and Applications III

23 April 2012 | Baltimore, Maryland, United States

Energy Harvesting and Storage: Materials, Devices, and Applications II

25 April 2011 | Orlando, Florida, United States

Micro- and Nanotechnology Sensors, Systems, and Applications II

5 April 2010 | Orlando, Florida, United States

Energy Harvesting and Storage: Materials, Devices, and Applications

5 April 2010 | Orlando, Florida, United States

Micro- and Nanotechnology Sensors, Systems, and Applications

15 April 2009 | Orlando, Florida, United States

Nanomaterial Synthesis and Integration for Sensors, Electronics, Photonics, and Electro-Optics

1 October 2006 | Boston, Massachusetts, United States

Nanostructure Integration Techniques for Manufacturable Devices, Circuits, and Systems: Interfaces, Interconnects, and Nanosystems

23 October 2005 | Boston, MA, United States

Showing 5 of 15 Conference Committees

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