Dr. Suneet Chadha Profile

Dr. Suneet Chadha

Leader of IOP Optical Systems Business Unit

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 8 March 2004 Paper

Waveguide infrared spectrometer platform for point and standoff chemical sensing

Suneet Chadha, Pat Henning, Frank Landers, Ani Weling

Proceedings Volume 5269, (2004) https://doi.org/10.1117/12.519426

KEYWORDS: Spectroscopy, Infrared spectroscopy, Waveguides, Biological and chemical sensing, Infrared sensors, Infrared radiation, FT-IR spectroscopy, Sensors, Thermography, Integrated optics

Read Abstract +

Advanced autonomous detection of chemical warfare agents and toxic industrial chemicals has long been a major military concern. At present, our capability to rapidly assess the immediate environment is severely limited and our domestic infrastructure is burdened by the meticulous procedures required to rule out false threats. While significant advances have recently been accomplished in remote spectral sensing using rugged FTIRs and point detectors, efforts towards low cost chemical discrimination have been lacking. Foster-Miller has developed a unique waveguide spectrometer which is a paradigm shift from the conventional FTIR approach. The spectrometer provides spectral discrimination over the 3-14 μm range and will be the spectrometer platform for both active and passive detection. Foster-Miller has leveraged its innovations in infrared fiber-optic probes and the recent development of a waveguide spectrometer to build a novel infrared sensor platform for both point and stand-off chemical sensing. A monolithic wedge-grating optic provides the spectral dispersion with low cost thermopile point or array detectors picking off the diffracted wavelengths from the optic. The integrated optic provides spectral discrimination between 3-12 μm with resolution at 16 cm^-1 or better and overall optical throughput approaching 35%. The device has a fixed cylindrical grating bonded to the edge of a ZnSe conditioning “wedge”. The conditioning optic overcomes limitations of concave gratings as it accepts high angle (large FOV) light at the narrow end of the wedge and progressively conditions it to be near normal to the grating. On return, the diffracted wavelengths are concentrated on the discrete or array detector (pixel) elements by the wedge, providing throughput comparable to that of an FTIR. The waveguide spectrometer coupled to ATR probes, flow through liquid cells or multipass gas cells provides significant cost advantage over conventional sampling methodologies. We will present the enabling innovations along with present performance, sensitivity expectations and discrimination algorithm strategy.

Proceedings Article | 15 August 2003 Paper

Handheld chemical threat monitor for the soldier system

Suneet Chadha, Patrick Henning, Ani Weling, Franklin Landers, Alan Samuels

Proceedings Volume 5085, (2003) https://doi.org/10.1117/12.488670

KEYWORDS: Sensors, Spectroscopy, Liquids, FT-IR spectroscopy, Infrared radiation, Mid-IR, Absorption, Infrared sensors, Infrared detectors, Infrared spectroscopy

Read Abstract +

Proceedings Article | 7 February 2002 Paper

Miniaturized spectrometer for stand-off chemical detection

Patrick Henning, Suneet Chadha, Richard Damren, Rebecca Rowe, Chuck Stevenson, Lawrence Curtiss, Thomas DiGiuseppe

Proceedings Volume 4574, (2002) https://doi.org/10.1117/12.455166

KEYWORDS: Sensors, Spectroscopy, Waveguides, Diffraction gratings, Chemical detection, Detector arrays, Infrared detectors, Infrared radiation, Infrared technology, Infrared spectroscopy

Read Abstract +

Proceedings Article | 9 December 1999 Paper

Dedicated monolithic infrared spectrometer for process monitoring

Suneet Chadha, William Kyle, Roy Bolduc, Lawrence Curtiss

Proceedings Volume 3859, (1999) https://doi.org/10.1117/12.372940

KEYWORDS: Sensors, Spectroscopy, Infrared spectroscopy, FT-IR spectroscopy, Infrared radiation, Thermography, Chemical analysis, Infrared sensors, Statistical analysis, Absorption

Read Abstract +

Proceedings Article | 23 February 1999 Paper

Mid-infrared fiber optic hazardous waste identification system

Suneet Chadha, William Kyle, William Stevenson, Roy Bolduc, Mark Druy

Proceedings Volume 3540, (1999) https://doi.org/10.1117/12.339783

KEYWORDS: System identification, Chemical analysis, Liquids, FT-IR spectroscopy, Spectroscopy, Statistical analysis, Fiber optics sensors, Mid-IR, Fiber optics, Computing systems

Read Abstract +

Proceedings Article | 18 January 1999 Paper

High-throughput infrared spectrometer for standoff chemical detection

Suneet Chadha, Chuck Stevenson, Lawrence Curtiss

Proceedings Volume 3533, (1999) https://doi.org/10.1117/12.336847

KEYWORDS: Spectroscopy, Sensors, Infrared spectroscopy, Thermography, Optical fibers, Mirrors, FT-IR spectroscopy, Refractive index, Standoff detection, Glasses

Read Abstract +

Proceedings Article | 24 April 1996 Paper

Optical arrays and pattern recognition in the design of an artificial nose

Todd Dickinson, Suneet Chadha, David Walt, Joel White, John Kauer

Proceedings Volume 2676, (1996) https://doi.org/10.1117/12.238810

KEYWORDS: Sensors, Polymers, Optical arrays, Optical pattern recognition, Nose, Neural networks, Olfactory system, Fiber optics, Computing systems, Chemistry

Read Abstract +

Showing 5 of 7 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years