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Now showing items 1-20 of 24

A 4320 nm quantum cascade laser-based TDLS system for long-term measurement of ambient carbon dioxide levels at Gandhinagar in western India

Roy, Anirban; Chawhan, Rohan Shuddhodhan; Chakraborty, Arup Lal (2018-09-10)
Absolute concentration measurements of bacterial CO2 emission using a 2004 nm vertical cavity surface emitting tunable diode laser

A. S., Zarin; Chakraborty, Arup Lal (Recent Advances in Photonics (WRAP), 2015-12)
Accurate recovery of a methane absorption line using the residual amplitude modulation method implemented at the phase quadrature frequency of a laser diode

Upadhyay, Abhishek; Chakraborty, Arup Lal (2014-05-20)
Calibration-free 2f wavelength modulation spectroscopy using normalization by the nonlinear intensity modulation for quantitative industrial gas measurements

Chakraborty, Arup Lal; Johnstone, Walter (2011-09-11)
Current scenario of ambient carbon dioxide levels at multiple locations in urban Ahmedabad revealed by a 2004 nm tunable diode laser spectroscopy system

Roy, Anirban; Sharma, Neetesh Kumar; Chakraborty, Arup Lal; Upadhyay, Abhishek (IEEE, 2017-10-29)

This paper reports the design and deployment of a portable tunable diode laser spectroscopy system for in situ measurement of atmospheric carbon dioxide. Recent measurements made at three busy locations in urban Ahmedabad ...
Current Status of Calibration-Free Tunable Diode Laser Spectroscopy Techniques for Industrial Gas Monitoring

Chakraborty, Arup Lal (2011-12-03)

Industrial gas monitoring applications have greatly benefited from recent developments in tunable diode laser spectroscopy which is the industry standard in non-invasive, real-time measurement. Calibration-free wavelength ...
Detecting metabolic carbon dioxide using a tunable laser for non-invasive monitoring of growth of bacterial pathogens

A. S., Zarin; Chakraborty, Arup Lal; Upadhyay, Abhishek (ICM Centre, 2017-06-25)
Detection of methane at 1650nm and carbon dioxide at 2004nm using tunable diode laser spectroscopy

Upadhyay, Abhishek; Chakraborty, Arup Lal (2012-12-09)

Recovery of the absolute absorption line shape is demonstrated for methane with a 1650nm edge-emitting laser and for carbon dioxide with a 2004nm VCSEL. The potential for direct detection and wavelength modulation ...
Fiber bragg grating interrogation using a wavelength modulated 1651 nm tunable distributed feedback laser and a fiber ring resonator for wearable biomedical sensors

Roy, Anirban; Chakraborty, Arup Lal; Jha, Chandan Kumar (2017-04-25)
A fiber bragg grating sensor-based wearable system to detect the pre-dicrotic and dicrotic notch in the arterial pulse pressure waveform

Jha, Chandan Kumar; Sinha, Oindrila; Chakraborty, Arup Lal (13-12-19)
A fiber bragg grating-based sensing glove with a sensitivity of 18.45 pm/degree to accurately assess finger flexure

Jha, Chandan Kumar; Chakraborty, Arup Lal; Agarwal, Shivang (2018-09-24)
Interrogation of an FBG-based temperature measurement system using a tunable diode laser and a fiber ring resonator

Gupta, Ankita; Chakraborty, Arup Lal; Upadhyay, Abhishek (2014-01-08)
Large and controllable light-induced shift of the longitudinal surface plasmon resonance of gold nanorods submerged in hydroquinone solution

Ghosh, Piue; Kar, Ashish; Thambi, Varsha; Chakraborty, Arup Lal; Khatua, Saumyakanti (13-12-19)
Open-path CO2 measurement in indoor and outdoor environments in the Ahmedabad-Gandhinagar area using a 2004 nm tunable VCSEL

Roy, Anirban; Upadhyay, Abhishek; Chakraborty, Arup Lal (Indian Institute of Technology Kanpur, 2016-12-04)
Optimization of calibration-free wavelength modulation spectroscopy technique for gas parameter measurement

Upadhyay, Abhishek; Chakraborty, Arup Lal (2014-03-05)

The residual amplitude modulation (RAM) method, which is the simplest wavelength modulation spectroscopy (WMS) method for calibration-free measurement of gas concentration and pressure, can be optimized by selecting a ...
Photoelectrochemical water splitting with cobalt oxide coated gold nanorods under visible excitation

Ghosh, Piue; Kar, Ashish; Chakraborty, Arup Lal; Sharma, Sudhanshu; Dutta, Arnab; Khatua, Saumyakanti (2019-06-23)
Quantitative wavelength modulation spectroscopy for gas measurements - elimination of laser intensity modulation effects

Chakraborty, Arup Lal; Johnstone, Walter (2010-12-15)

Quantitative tunable diode laser spectroscopy (TDLS) has established itself as a very powerful technique for the detection of gases in field applications such as industrial process control. Recent calibration-free techniques ...
Rapid detection of CO2 using a Raspberry Pi-based field-deployable tunable diode laser spectroscopy system

Gandhi, Vaibhav; Heda, Shashank; A. S., Zarin; Upadhyay, Abhishek; Chakraborty, Arup Lal (ICMAP, 2015-12-11)
Rapid detection of methane, carbon dioxide and ammonia for harsh environments using tunable diode laser spectroscopy

Upadhyay, Abhishek; Dighe, Aditi; Chakraborty, Arup Lal (Institute of Electrical and Electronics Engineers (IEEE), 2013-12-13)

This paper reports time-varying and simultaneous detection of the pressure and concentration, of hazardous gases such as methane, carbon dioxide and ammonia using tunable diode laser spectroscopy (TDLS). The concentration ...
Real-time accurate monitoring of ten finger joint angles using a fiber bragg grating sensor-based glove for use in virtual rehabilitation

Jha, Chandan Kumar; Chakraborty, Arup Lal (13-12-19)

Now showing items 1-20 of 24

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