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Now showing items 1-20 of 25

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 ...
Quantum cascade laser-based wavelength modulation spectroscopy

Chakraborty, Arup Lal (2020-10-24)
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 ...

Now showing items 1-20 of 25

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