Talks

  1. Quantum cascade laser-based mid-infrared calibration-free wavelength modulation spectroscopy”, Asia Communications and Photonics Conference - International Conference on Information Photonics and Optical Communications (ACP-IPOC 2020), 24-27 Oct 2020, Beijing (invited), link

  2. "Photonic sensors for demanding applications in science and technology", 2nd International Conference on Ubiquitous and Emerging concepts on Sensors and Transducers (UEMCOS 2020), 16-18 Oct 2020, Kolkata, India (invited

  3. "Tunable diode laser spectroscopy - a versatile technique for gas and chemical sensing", 28th DAE-BRNS National Laser Symposium (NLS-28), 8-11 Jan 2020, Vellore, India (invited)

  4. "Fiber Optic Sensors and Related Technologies", Short Course at the 28th DAE-BRNS National Laser Symposium (NLS-28), 8-11 Jan 2020, Vellore, India

  5. Chemical sensing using tunable semiconductor lasers - applications relevant to India", Photonics and Sensors Workshop, City University London, 27-28 June 2019, (invited)

  6. "Deployment of near-IR and mid-IR tunable laser diode spectroscopy systems for urban pollution monitoring - the first set of results from Ahmedabad and Mt Abu", Student Conference on Optics and Photonics (SCOP 2018), Oct 4-6, 2018, Physical Research Laboratory, Ahmedabad, India (invited)

  7. "Calibration-free near-infrared and mid-infrared wavelength modulation spectroscopy in industrial sensing and microbiological growth studies", The 10th International Conference on Information Optics and Photonics (CIOP 2018), (Session 2: Advanced Fiber Optics & Sensing Technology), Beijing, China, July 8-11, 2018. (invited). link

  8. "Gas sensing using near-IR and mid-IR tunable semiconductor lasers for industrial and bio-sensing applications", Department of Electrical and Electronic Engineering, City University London, 1 June 2018. link

  9. "Environmental monitoring and bio-sensing applications of tunable diode laser spectroscopy" - 3rd IEEE Workshop on Recent Progress in Photonics (IEEE WRAP 2017), Mahindra Ecole Centrale, 18-19 Dec 2017 (invited)

  10. "Potential of tunable diode laser spectroscopy for detecting oxygen leaks in helicopters", Defense Bioengineering and Electromedical Laboratory (DEBEL), DRDO, Bangalore, 1 July 2016 (invited)

  11. "Industrial applications of fiber-optic sensors”, Annual Photonics Workshop (APW 2011), Cochin University of Science and Technology, Cochin, 28 Feb 2011 (invited)

 

Book chapter

  1. Chakraborty A.L., Roy A. (2021) Wavelength Modulation Spectroscopy. In: Singh D.K., Pradhan M., Materny A. (eds) Modern Techniques of Spectroscopy. Progress in Optical Science and Photonics, vol 13. Springer, Singapore. https://doi.org/10.1007/978-981-33-6084-6_13  (invited)

Patents

  1. C K Jha and A L Chakraborty, “A system for monitoring hand and finger movements”, Indian Patent Office, Provisional Patent Application No.: 202021029035, date of filing 8 July 2020

Journal papers

  1. A Roy and A L Chakraborty, "QCL-based open-path, single-pass measurement of ambient carbon monoxide using R1f/ΔI1 WMS", accepted, IEEE Photonics Technology Letters (Special Issue: ACP2020), Feb 2021

  2. C K Jha, K Gajapure and A L Chakraborty, “Design and evaluation of an FBG sensor-based glove to simultaneously monitor flexure of ten finger joints”, IEEE Sensors Journal, 21(6), 7620-7630 (March 2021) doi.org/10.1109/JSEN.2020.3046521

  3. P Ghosh, Varsha T, A Kar, A L Chakraborty and S Khatua, “Precise light-induced in situ active tuning of the LSPR of gold nanorods over 100 nm”, to be submitted

  4. P Ghosh, A Kar, Varsha T, A L Chakraborty and S Khatua, "Light-controlled red shift of gold nanorod plasmon in hydroquinone solution", manuscript under preparation

  5. P Ghosh, G Joshi, A L Chakraborty, R Hegde, and S Khatua, "A new gold nanostructure with 8 nm tip size and high field enhancement in the near-infrared region synthesized using a simple wet-chemical method", manuscript under preparation

  6. Zarin A S, A L Chakraborty, S Khatua, "Time-resolved studies of bioluminescence from Photobacterium leiognathi and antimicrobial susceptibility testing on E. coli using tunable diode laser spectroscopy", IEEE Sensors Journal, Vol 40, Iss 19, pp 11073-11081 Oct 2020 https://doi.org/10.1109/JSEN.2020.2996228

  7. A Roy, A L Chakraborty, “Intensity modulation-normalized calibration-free 1f and 2f wavelength modulation spectroscopy”, IEEE Sensors Journal, Vol 20, Iss 21, pp 12691-12701, Nov 2020 https://doi.org/10.1109/JSEN.2020.3000470

  8. A Roy, R S Chawhan, A L Chakraborty, "Field deployment of a 4320 nm quantum cascade laser-based TDLS system to compare the background CO2 levels in Mt. Abu with foreground measurements in Gandhinagar, India," SPIE Optical Engineering 59(2), 024110 (2020), https://doi.org/10.1117/1.OE.59.2.024110

  9. P Ghosh, A Kar, S Khandelwal, D Vyas, A Q Mir, A L Chakraborty, R S Hegde, S Sharma, A Dutta, and S Khatua, “Plasmonic CoO-decorated Au nanorods for photoelectrocatalytic water oxidation”, ACS Applied Nano Materials, 2(9), 5795-5803, (2019) https://doi.org/10.1021/acsanm.9b01258

  10. A Roy, R S Chawhan, R Patel, S Varadharajan, L M Tiwari, A L Chakraborty, C Ghoroi and G Srivastava, “Quantifying the CO and CO2 mole fraction in the plume of an aerosol-based fire extinguishing agent using 4560 nm and 4320 nm QCLs”, IEEE Sensors Journal, 19(21), Nov 2019, https://doi.org/10.1109/JSEN.2019.2927081

  11. C K Jha, S Agarwal, A L Chakraborty and C Shirpurkar, "An FBG-based sensing glove to measure dynamic finger flexure with angular resolution of 0.1 degree and for speeds up to 80 degrees/s", IEEE/OSA Journal of Lightwave Technology, (Special Issue of OFS-26, Oct 2018), 37(18), Sep 15, 2019 https://doi.org/10.1109/JLT.2019.2919496

  12. A Roy, N K Sharma, A L Chakraborty and A Upadhyay, “Measurement of atmospheric carbon dioxide and water vapour in urban built-up areas in the Gandhinagar-Ahmedabad region in India using a portable tunable diode laser spectroscopy system”, Applied Optics (Feature issue: Near- to mid-IR (1–13 μm) III-V Semiconductor Lasers), 56(31), H57-H66, Nov 2017 https://doi.org/10.1364/AO.56.000H57

  13. Zarin A S, A L Chakraborty and A Upadhyay, “Absolute and non-invasive measurements of CO2 emission from batch culture of E coli using calibration-free 2f wavelength modulation spectroscopy applied to a 2004 nm VCSEL”, Optics Letters, 42(11), 2138-2141 (2017) https://doi.org/10.1364/OL.42.002138

  14. A Roy, A L Chakraborty and C K Jha, “Fiber Bragg grating interrogation using wavelength modulated tunable DFB lasers and a fiber-optic Mach-Zehnder interferometer", Applied Optics, 56(17), 3562-3569 (2017), https://doi.org/10.1364/AO.56.003562

  15. A Upadhyay, D Wilson, M Lengden, A L Chakraborty, G Stewart and W Johnstone, "Calibration-free WMS measurement of gas parameters with in-situ real-time laser parameter characterization using continuous wave DFB-QCL, VCSEL and DFB lasers", IEEE Photonics Journal, 9(2), April 2017, https://doi.org/10.1109/JPHOT.2017.2655141

  16. A Upadhyay, A L Chakraborty, "Calibration-free 2f WMS with in situ real time characterization of a laser modulated at its phase quadrature and with 2f RAM nulling", Optics Letters, 40(17), pp. 4086-4089, (2015), https://doi.org/10.1364/OL.40.004086

  17. A Upadhyay, A L Chakraborty, “Wavelength modulation spectroscopy of methane using the residual amplitude modulation method implemented at the phase quadrature frequency of a 1650 nm laser diode", IEEE Sensors Journal, 15(2), pp 1153-1160, (2015) https://doi.org/10.1109/JSEN.2014.2358714

  18. A L Chakraborty, K Ruxton, W Johnstone, “Suppression of intensity modulation contributions to signals in second harmonic wavelength modulation spectroscopy”, Optics Letters, 35(14), pp. 2400-2402 (2010) https://doi.org/10.1364/OL.35.002400

  19. K Ruxton, A L Chakraborty, W Johnstone, M Lengden, G Stewart, K Duffin, "Tunable diode laser spectroscopy with wavelength modulation: elimination of residual amplitude modulation in a phasor decomposition approach", Sensors and Actuators B: Chemical, 150(1), pp 367-375, September 2010. https://doi.org/10.1016/j.snb.2010.06.058

  20. I Armstrong, W Johnstone, K Duffin, M Lengden, A L Chakraborty and K Ruxton, "Detection of CH4 in the mid-IR using difference frequency generation with tunable diode laser spectroscopy", IEEE Journal of Lightwave Technology, 28(10), pp 1435-1442, February 2010 https://doi.org/10.1109/JLT.2010.2042789

  21. A L Chakraborty, K Ruxton and W Johnstone, “Influence of the wavelength-dependence of fiber couplers on the background signal in wavelength modulation spectroscopy with RAM-nulling”, Optics Express, 18(1), pp 267-280 (2010), https://doi.org/10.1364/OE.18.000267

  22. A L Chakraborty, K Ruxton, W Johnstone, M Lengden and K Duffin, “Elimination of residual amplitude modulation in tunable diode laser wavelength modulation spectroscopy using an optical fiber delay line”, Optics Express, 17(12), pp. 9602-9607 (2009). https://doi.org/10.1364/OE.17.009602

  23. A L Chakraborty, R K Sharma, M K Saxena, S Kher, “Compensation for temperature dependence of Stokes signal and dynamic self-calibration of a Raman distributed temperature sensor”, Optics Communications, 274(2), pp 396-402, 15 June 2007, https://doi.org/10.1016/j.optcom.2007.02.028

  24. A L Chakraborty, S Kher, S Chaubey, T P S Nathan, “Bi-directional frequency-domain digital filtering to simultaneously improve temperature resolution and eliminate spatial inaccuracy of a distributed temperature sensor”, Optical Engineering, 43(11), pp 2724-2729, Nov 2004, https://doi.org/10.1117/1.1797871

  25. S Kher, G Srikanth, S Chaubey, A L Chakraborty, T P S Nathan, D D Bhawalkar, “Design, development and studies on a Raman-based fiber-optic distributed temperature sensor”, Current Science, 83(11), pp 1365-8, Dec 2002

Conference papers

  1. Zarin A S, A L Chakraborty, S Khatua, "Correlating microbial bioluminescence to the different phases of growth using a 2004 nm VCSEL-based 2f wavelength modulation spectroscopy", accepted, CL-P.8, Conference on Lasers and Electro-Optics/ European Quantum Electronics Conference (CLEO Europe, - EQEC 2021), 21 - 25 June 2021

  2. P Ghosh, V Thambi , A Kar , A L Chakraborty, S Khatua, "Light controlled in-situ tuning of plasmon resonance of a gold nanorod in sodium dodecyl sulphate", submitted to 25th International Commission for Optics (ICO-25) and the Conference of International Society on Optics Within Life Sciences (OWLS-16), 31 Aug - 4 Sep 2020, Dresden, Germany

  3. C K Jha, S S Bhattacharjee, J N Chauhan, A L Chakraborty, N V George, "Speech quality estimation of an FBG sensor-based contact microphone in noisy environment", 27th International Conference on Optical Fibre Sensors (OFS 2020), 8-12 June 2020, Virginia, USA

  4. P Ghosh, A Kar, V Thambi, A L Chakraborty and S Khatua, "Large and controllable light-induced shift of the longitudinal surface plasmon resonance of gold nanorods submerged in hydroquinone solution", IEEE WRAP 2019, 13-14 Dec 2019, IIT Guwahati

  5. C K Jha and A L Chakraborty, "Real-time monitoring of ten fingers joints using a fiber Bragg grating-based sensor glove for virtual rehabilitation", IEEE WRAP 2019, 13-14 Dec 2019, IIT Guwahati

  6. A Roy and A L Chakraborty, "Quantum cascade laser-based in situ measurement of atmospheric CO and CO2 in Gandhinagar using 1f and 2f wavelength modulation spectroscopy", IEEE WRAP 2019, 13-14 Dec 2019, IIT Guwahati

  7. C K Jha, O Sinha, A L Chakraborty, “A fiber Bragg grating sensor-based wearable system to detect the pre-dicrotic and dicrotic notch in the arterial pulse pressure waveform”, 2019 IEEE 16th India Council International Conference (INDICON 2019), 13-15 Dec 2019,  Rajkot, India, https://doi.org/10.1109/INDICON47234.2019.9030334

  8. A Roy, A L Chakraborty and K T V Grattan, "A 1531.52 nm tunable diode laser-based system for high-sensitivity remote monitoring of acetylene and ammonia leaks in industrial plants", Proceedings of the International Conference on Optics and Electro-Optics (ICOL 2019), 19-22 Oct 2019, Dehradun, India, Editors: Singh, K., Gupta, A.K., Khare, S., Dixit, N., Pant, K. (Eds.), 19-22 Oct 2019, Dehra Dun, India (oral presentation), https://doi.org/10.1007/978-981-15-9259-1

  9. P Ghosh, A Kar, A L Chakraborty, S Sharma, A Dutta and S Khatua, “Photoelectrochemical water splitting with cobalt oxide coated gold nanorods under visible excitation”, poster EG-P.6, CLEO Europe-EQEC 2019, 23-27 June 2019, Munich, Germany

  10. P Ghosh, G Joshi, A L Chakraborty, R Hegde, S Khatua, “Synthesis of gold nanodroplets with field enhancement of 10^5 at their tips using a simple wet-chemical method”, poster EH-P.12, CLEO Europe-EQEC 2019, 23-27 June 2019, Munich, Germany

  11. P Ghosh, A Tripathi, K Bhagtani, V Thambi, A L Chakraborty and S Khatua, "Synthesis of cobalt-coated gold nanorods using a wet chemical method", International Conference on Fiber Optics and Photonics (PHOTONICS 2018), 12-15 Dec 2018, New Delhi

  12. Zarin A S, A L Chakraborty, S Khatua, "Non-invasive and simultaneous high time-resolution monitoring of CO2 emission and bio-luminescence in a batch culture of Photobacterium leiognathi", International Conference on Fiber Optics and Photonics (PHOTONICS 2018), 12-15 Dec 2018, New Delhi (oral presentation)

  13. A Roy, R S Chawhan and A L Chakraborty, "A portable mid-infrared quantum cascade laser-based TDLS system for atmospheric carbon dioxide measurement: results of a week-long expedition to Mount Abu", International Conference on Fiber Optics and Photonics (PHOTONICS 2018), 12-15 Dec 2018, New Delhi                              BEST POSTER AWARD

  14. R S Chawhan, A Roy and A L Chakraborty, "Development of a compact and light-weight 1392 nm tunable diode laser-based system for real-time ambient water vapour measurements", International Conference on Fiber Optics and Photonics (PHOTONICS 2018), 12-15 Dec 2018, New Delhi

  15. A K Shukla, K K Dey and A L Chakraborty, “Debye-Sear effect in active liquids”, 3rd International Conference on Soft Materials (ICSM 2018), MNIT Jaipur, India, 9-14 Dec 2018

  16. C K Jha and A L Chakraborty, "A fiber Bragg grating strain sensor-based glove to accurately measure the bend angle of the finger flexed at the proximal inter-phalangeal joint", IEEE Sensors 2018 (A3L-C: Optical Fiber II Lecture session), 28-31 Oct 2018, New Delhi, India (oral presentation) https://doi.org/10.1109/ICSENS.2018.8589898

  17. A Roy, R S Chawhan, A L Chakraborty, "A 4320 nm quantum cascade laser-based TDLS system for long-term measurement of ambient carbon dioxide levels at Gandhinagar in western India", Field Laser Applications in Industry and Research (FLAIR 2018), 10-14 Sep 2018, Italy

  18. C K Jha, A L Chakraborty and S Agarwal, "A fiber Bragg grating-based sensing glove with a sensitivity of 18.45 pm/degree to accurately assess finger flexure", 26th International Conference on Optical Fibre Sensors, (OFS-26), 24-28 Sep 2018, Lausanne, Switzerland (oral presentation), https://doi.org/10.1364/OFS.2018.WB4             SPIE OUTSTANDING RESULTS AWARD

  19. Zarin AS and A L Chakraborty, "Rapid and non-invasive anti-microbial susceptibility testing using tunable diode laser spectroscopy", International Conference on Cell Biology (ICCB 2018), 27-31 Jan 2018, Hyderabad, India

  20. P Ghosh, V Thambi, S Khatua and A L Chakraborty, “Synthesis of gold nanorods with tunable surface plasmon resonance for near-infrared bio-sensing applications”, IEEE Workshop of Recent Advances in Photonics (WRAP 2017), 18-19 Dec 2017, Hyderabad, India, https://doi.org/10.1109/WRAP.2017.8468598                                                               BEST POSTER AWARD

  21. A Roy, N K Sharma, A L Chakraborty, A Upadhyay, "Current scenario of ambient carbon dioxide levels at multiple locations in urban Ahmedabad revealed by a 2004 nm tunable diode laser spectroscopy system", IEEE Sensors 2017, Optical Sensors and Systems II Poster session C2P-J, Glasgow, UK, Oct 2017, https://doi.org/10.1109/ICSENS.2017.8234369

  22. Zarin A S, A L Chakraborty, A Upadhyay, "Detecting metabolic carbon dioxide using a tunable laser for non-invasive monitoring of growth of bacterial pathogens", oral presentation (1617/CL-4.6), CLEO Europe- EQEC 2017, 25-29 June 2017, Munich, Germany, https://doi.org/10.1109/CLEOE-EQEC.2017.8087202

  23. A Roy, A L Chakraborty, C K Jha, “Fiber Bragg grating interrogation using a wavelength modulated 1651 nm tunable distributed feedback laser and a fiber ring resonator for wearable biomedical sensors”, 25th International Conference on Optical Fiber Sensors (OFS-25), 25-28 April 2017, Korea

  24. A Roy, A Upadhyay and A L Chakraborty, "Open-path CO2 measurement in indoor and outdoor environments in the Ahmedabad-Gandhinagar area using a 2004 nm tunable VCSEL", oral presentation at International Conference on Fiber Optics and Photonics (Photonics 2016), 4-8 Dec 2016, IIT Kanpur https://doi.org/10.1364/PHOTONICS.2016.W4G.2

  25. A Upadhyay, P Chakraborty, A Roy, A L Chakraborty, "Measurement of carbon dioxide concentrations in urban built-up areas using a portable 2004 nm VCSEL-based calibration-free TDLS system with wireless data logging", Field Laser Applications in Industry and Research (FLAIR 2016), Aix les Bains, France, 12-16 Sep 2016

  26. A Roy, A Upadhyay, A L Chakraborty, "High-sensitivity remote detection of atmospheric pollutants and greenhouse gases at low ppm levels using near-infrared tunable diode lasers", Proc. SPIE 9876, Remote Sensing of the Atmosphere, Clouds, and Precipitation VI, 98761W, 4-7 April 2016, New Delhi (May 5, 2016); https://doi.org/10.1117/12.2222785

  27. Zarin AS and A L Chakraborty, “Absolute concentration measurements of bacterial CO2 emission using a 2004 nm vertical cavity surface emitting tunable diode laser”, 2015 IEEE Workshop on Recent Advances in Photonics (WRAP-2015), 13-16 Dec 2015, IISc Bangalore

  28. V Gandhi, S Heda, R Anand, Zarin A S, A Upadhyay and A L Chakraborty, “Rapid detection of CO2 using a Raspberry Pi-based field-deployable tunable diode laser spectroscopy system”, International Conference on Microwave and Photonics (ICMAP 2015), 13-15 Dec 2015, ISM Dhanbad

  29. R Mallik, A Joshi, A Gupta and A L Chakraborty, "Using tunable laser diodes to classify cold drinks brands and interrogate an FBG-based temperature sensor", in 12th International Conference on Fiber Optics and Photonics (Photonics 2014), OSA Technical Digest (online) (Optical Society of America, 2014), paper T4B.5. http://www.opticsinfobase.org/abstract.cfm?URI=Photonics-2014-T4B.5

  30. A Upadhyay, A L Chakraborty, “Accurate recovery of a methane absorption line using the residual amplitude modulation method implemented at the phase quadrature frequency of a laser diode”, Field Laser Applications in Industry and Research (FLAIR 2014), Florence, Italy, 5-9 May 2014

  31. A Upadhyay, A L Chakraborty, “Optimization of calibration-free wavelength modulation spectroscopy technique for gas parameter measurement”, International Conference on Optics and Optoelectronics (ICOL 2014), 38th Symposium of the Optical Society of India, IRDE Dehra Dun, 3-5 March 2014

  32. A Gupta, A Upadhyay, A L Chakraborty, “Interrogation of an FBG-based temperature measurement system using a tunable diode laser and a fiber ring resonator”, 22nd DAE-BRNS National Laser Symposium (NLS-22), Manipal University, 8-11 Jan 2014

  33. A Upadhyay, A Dighe and A L Chakraborty, “Rapid detection of methane, carbon dioxide and ammonia for harsh environments using tunable diode laser spectroscopy”, International Conference on Microwave and Photonics (ICMAP 2013), 13-15 Dec 2013, ISM Dhanbad. https://doi.org/10.1109/ICMAP.2013.6733517

  34. A Upadhyay and A L Chakraborty, "Detection of methane at 1650 nm and carbon dioxide at 2004 nm using tunable diode laser spectroscopy", 12th International Conference on Fiber Optics and Photonics, (Photonics 2012), 11-15 Dec 2012, Chennai, India

  35. A Upadhyay, V V Katre and A L Chakraborty, "Tunable diode laser spectroscopy with electronically controlled background RAM nulling", Proc. of the 22nd Optical Fiber Sensors (OFS-22), 15-19 Oct, 2012, Beijing, China, doi: http://dx.doi.org/10.1117/12.975190

  36. A L Chakraborty, “Calibration-free approaches in tunable diode laser spectroscopy of gases for calibration-free measurement of concentration and pressure”, 20th National Laser Symposium (NLS-20), 9-12 Jan 2012, Chennai, India

  37. A L Chakraborty, “Calibration-free approaches in tunable diode laser spectroscopy of gases for industrial applications”, Frontiers in Optics and Photonics (FOP-11), 37th OSI Symposium of Optical Society of India (OSI), 3-5 Dec 2011, New Delhi, India

  38. A L Chakraborty and W Johnstone, “Calibration-free 2f wavelength modulation spectroscopy using normalization by the nonlinear intensity modulation for quantitative industrial gas measurements”, Field Laser Applications in Industry and Research (FLAIR 2011), 13-17 Sep 2011, Murnau, Germany

  39. A L Chakraborty and W Johnstone, “Tunable diode laser spectroscopy of methane for calibration-free industrial measurement of concentration and pressure”, Contemporary Trends in Optics and Optoelectronics, 36th OSI Symposium of Optical Society of India (OSI), 17-19 Jan 2011, Thiruvananthapuram, India

  40. A L Chakraborty, W Johnstone, “Quantitative wavelength modulation spectroscopy for gas measurements – elimination of laser intensity modulation effects”, Proceedings Volume 8173, (Photonics 2010): Tenth International Conference on Fiber Optics and Photonics; 81731X (2011) , 11-15 December 2010, IIT Guwahati, India https://doi.org/10.1117/12.897883

  41. G Stewart, K Ruxton, A L Chakraborty and W Johnstone, “Tunable diode laser spectroscopy with wavelength modulation: an overview of current techniques and motivations”, PHOTON 10, 23-26 Aug 2010, University of Southampton, United Kingdom

  42. K Ruxton, A L Chakraborty, A J McGettrick, K Duffin, W Johnstone and G Stewart, “Recent advance in tunable diode laser spectroscopy with background RAM Nulling for industrial applications”, 20th International Conference on Optical Fibre Sensors (OFS-20), 5-9 Oct 2009, Edinburgh, UK, https://doi.org/10.1117/12.833000

  43. A L Chakraborty, K Ruxton and W Johnstone, “Tunable diode laser spectroscopy with RAM nulling – current status and future possibilities”, Field Laser Applications in Industry and Research (FLAIR 2009), 6-11 Sep 2009, Grainau, Germany

  44. K Ruxton, A L Chakraborty, A J McGettrick, K Duffin, W Johnstone and G Stewart, “Diode laser spectroscopy using a calibration-free phasor decomposition approach with RAM nulling”, 7th International Conference on Tunable Diode Laser Spectroscopy (TDLS-2009), 13-17 July 2009, Zermatt, Switzerland

  45. I Armstrong, A L Chakraborty, K Ruxton, and W Johnstone, “An investigation of TDLS modulation schemes as applied to the Mid-IR spectral region by difference frequency generation in PPLN”, 7th International Conference on Tunable Diode Laser Spectroscopy (TDLS-2009), 13-17 July 2009, Zermatt, Switzerland

  46. A L Chakraborty, K Ruxton, W Johnstone, M Lengden and K Duffin, “Elimination of residual amplitude modulation in TDLS-WMS”, Conference on Lasers and Electro-Optics/ European Quantum Electronics Conference (CLEO Europe/EQEC-2009), 14-19 June 2009, Munich, Germany, https://doi.org/10.1109/CLEOE-EQEC.2009.5196266

  47. A L Chakraborty, S Kher, A K Nath, “Dynamic self-calibration of a Raman distributed temperature sensor”, 8th International Conference on Optoelectronics, Fiber Optics and Photonics, (Photonics 2006), Dec 13-16, 2006, Hyderabad, India BEST POSTER AWARD

  48. A L Chakraborty, S Kher, S Chaubey, T P S Nathan, “Application of bidirectional frequency-domain digital filtering to simultaneously improve the temperature resolution and eliminate spatial inaccuracy of a distributed temperature sensor”, National Symposium on Instrumentation (NSI-28), G. B. Pant University of Agriculture and Technology, Pantnagar, 2003