Recent Publications

a. Articles Published in Refereed Journals

 

96. Varsha, and G. Das,“ Generation of wavelength-switchable nanosecond mode-locked pulses in an Erbium/Ytterbium co-doped fiber laser cavity", Results in Optics, https://doi.org/10.1016/j.rio.2024.100723, vol. 16, July, 2024.

95. Varsha, and G. Das,“ Q-switched Er-doped fiber laser using an aqueous solution of gold nanorods and polyvinyl alcohol", Optical Fiber Technology, https://doi.org/10.1016/j.yofte.2024.103672, vol. 83, March, 2024.

94. Navneet Kaur, and G. Das,“ Three-dimensional plasmonic substrate as surface-enhanced Raman spectroscopy (SERS) tool for the detection of trace chemicals", Journal of Raman Spectroscopy, https://doi.org/10.1002/jrs.6649, January 1, 2024.

93. Joshua O Trevisanutto, Jonas K Valiunas, and G. Das,“Detection of C2H2 using a segmented HC-PCF gas cell", Measurement: Sensors, vol. 27, pp. 100773, June 1, 2023.

92. Navneet Kaur, and G. Das,“Plasmonic structure of zinc (Zn) and zinc oxide (ZnO) on a tapered optical fiber", Optical Materials Express, vol. 2, no. 9, pp. 3821-3828, August 26, 2022.

91. Navneet Kaur, Joshua O. Trevisanutto and G. Das,“Plasmonic structure on a tapered optical fiber for application as a Surface-Enhanced Raman Spectroscopy (SERS) Substrate", Microwave and Optical Technology Letters, DOI:10.1002/mop.32971, Vol. 63, no. 11, pp.2776 - 2781, November 2021.

90. Navneet Kaur, Joshua O. Trevisanutto and G. Das,“Tweezing and manipulating the distribution of gold nanorods (GNRs) on a tapered optical fiber to develop a plasmonic structure", OSA Continuum, vol. 3, no. 9, pp. 2415, August. 20, 2020.

89. Joshua O. Trevisanutto, Apichart Linhananta and G. Das,“Plasmonic structure: fiber grating formed by gold nanorods on a tapered fiber", Optics Letters, vol. 41, no. 24, pp. 5789-5792, Dec. 15, 2016.

88. Jonas K. Valiunas, Mario Tenuta and G. Das,“ A gas cell based on Hollow-Core Photonic Crystal Fiber (PCF) and its application for the detection of Greenhouse Gas (GHG): Nitrous Oxide (N2O)", Journal of Sensors, vol. 2016, doi:10.1155/2016/7678315, 2016.

87. Jonas K. Valiunas and G. Das,“ Brillouin Fiber Laser Using Nonlinear Birefringent Photonic Crystal Fiber", Int. J. of Comp. Application (ICETIC), pp 43-45, October 14, 2016.

86. Jonas K. Valiunas, George Stewart and G. Das,“ Detection of Nitrous Oxide (N2O) at sub-ppmv using Intracavity Absorption Spectroscopy (ICAS)", IEEE Photonics Technology Letters, vol. 28, no. 3, pp. 359-362, 2016.

85. Robert A. Drainville and G. Das“ A novel, simple model of cascaded fiber Raman lasers", Optics Communication, vol. 340, pp. 11-15, 2015.

84. G. Das, Z. J Chaboyer, J. E. Navratil, and Robert A Drainville“ Passively Q-switched Yb- and Sm-doped fiber laser at 1064 nm", Optics Communications, vol. 334, pp. 258-264, 2015.

83. Robert A. Drainville, and G. Das“, Widely tunable fiber Bragg grating and its application in fiber lasers", Microwave and Optical Tech. Letters, vol. 55, no. 12, 2824-2826, 2013.

82. J. Valiunas, and G. Das,“ Tunable single-longitudinal-mode high power fiber laser", International Journal of Optics: Special Issue, April 2012.

81. S. Pramanik, G. Das and S. N. Sarkar, “Comparative study of the influence of aspect ratio in trapezoidal index profile on fiber Raman amplifier performance”, Optical Engineering, vol. 49, no. 5, May 2010.

80. Z. J. Chaboyer, J. Valiunas, B. Adams, A. Chen and G. Das,“Single-wavelength fiber laser for localized temperature monitoring”, Microwave and Opt. Technol. Lett., vol. 52, no. 9, pp. 1941-1946, 2010.

79. M. Dastmalchi and G. Das, “Tunable medium power multiwavelength fiber laser”, Microwave and Opt. Technol. Lett., vol. 51, no.10, pp. 2517-2519, 2009.

78. Z. J. Chaboyer, P. J. Moore and G. Das, “Medium power single-mode single-wavelength fiber laser ”, Optics Communications, vol. 282, pp. 3100-3103, 2009.

77. G. Das and Z. J. Chaboyer, “Single-wavelength fiber laser with 250 mW output power at 1.57 µm ”, Optics Express, vol. 17, no. 10, pp. 7750-7755, 2009.

76. P. J. Moore, Z. J. Chaboyer and G. Das, “Tunable Dual-Wavelength fiber laser”, Optical Fiber Technology, Elsevier, vol. 15, pp. 377-379, 2009.

75. G. Das and M. Dastmalchi, “Medium power erbium-ytterbium co-doped multiwavelength fiber laser”, Optical Engineering, vol 47, no. 7, June 2008.

74. Z. Medendorp, J. Valiunas and G. Das, “Wavelength-Switchable fiber laser”, Microwave and Opt. Technol. Lett., vol. 49, no. 6, pp. 1231-12 33, 2007.

b. Articles Published in Refereed Conference Proceedings

73. Navneet Kaur, Varsha Varsha and G. Das , “Surface-enhanced Raman spectroscopy (SERS) for the detection of Rhodamine 6G and Crystal Violet”, Optica Biophotonics Congress: Optics in the Life Sciences, DTh2C.7, Virtual, Canada, April 24 -27, 2023.

72. Navneet Kaur and G. Das , “ZnO Plasmonic Structure on a Tapered Optical Fiber”, OSA Optical Sensors and Sensing Congress, Virtual, Canada, July 19-23,2021.

71. Joshua O. Trevisanutto and G. Das , “Gas Cell based on Segmented Hollow-Core Photonic Crystal Fiber and its Application in an Intracavity Absorption Spectroscopy System”, CLEO 2021, Virtual, USA, May 12, 2021.

70. Joshua O. Trevisanutto and G. Das , “Fabrication of a Tapered Optical Fiber with Nanostructure Produced by Optical Tweezing”, Applications of Lasers for Sensing and Free Space Communications, OSA Laser Congress, Boston, USA, Oct. 30 to Nov. 4, 2016.

69. G. Das, “Detection of greenhouse gas (N2O) using intracavity absorption spectroscopy (ICAS)”, CLEO 2016, San Jose, USA, June 5-10, 2016.

68. G. Das, “Fiber laser: A new technique for the detection of trace gases”, Photonics North, 2015, IEEE, 2015.

67. S. Pramanik, G. Das and S. N. Sarkar, “Comparative study of the influence of aspect ratio in trapezoidal index profile on fiber raman amplifier performance”, PHOTONICS-2008, International Conference on Fiber Optics and Photonics, IIT Delhi, India, Dec. 13-17, 2008.

66. G. Das and J. Valiunas,“A medium-power widely tunable single wavelength fiber laser (Reference 25)”, SPIE, vol. 7099, August 2008.

65. G. Das, “3D Plasmonic structure on the surface of a tapered optical fiber for the detection of trace chemicals", OPTIQ - 2023, XLVI OSI SYMPOSIUM International Conference on Optics, Photonics & Quantum Information, December 11-13, 2023, India (Invited Talk).

64. G. Das, “Detection and Quantification of Chemicals at Lower Concentrations", ASA, CSSA, SSSA International Annual Meeting, St. Louis, MO, USA, October 29 - November 1, 2023.

63. Varsha and G. Das, “Passively Q-Switched fiber laser using an aqueous solution of gold nanorods and poly vinyl alcohol as a saturableabsorber", CAP Congress 2023, June 18-22, 2023.

62. Navneet Kaur and G. Das, “Optical fiber probe for the detection of chemicals: Rhodamine 6G and Crystal Violet", CAP Congress 2023, June 18-22, 2023.

61. G. Das and Joshua O. Trevisanutto, “Photonic Device for the Detection of Nitrous Oxide (N2O) and Ammonia (NH3)", ASA, CSSA and SSSA International Annual Meetings, San Antonio, Texas, November 10-13, 2019.

60. Joshua O. Trevisanutto and G. Das, “Gas Cell Based on Hollow-Core Fiber for Trace Gas Detection", CAP Congress 2019, Simon Fraser University, June 2-7, 2019.

59. Navneet Kaur, Joshua O. Trevisanutto and G. Das, “Fiber-based nanoprobe for the detection of chemicals", CAP Congress 2019, Simon Fraser University, June 2-7, 2019.

58. G. Das and Joshua O. Trevisanutto, “Photonic Device for Gas Detection", CAP Congress 2019, Simon Fraser University, June 2-7, 2019.

57. G. Das and Joshua O. Trevisanutto, “Optical fiber nanoprobe for the detection of chemicals", CAP Conference, Dalhousie University, Halifax, Nova Scotia, June 11-15, 2018.

56. Joshua O. Trevisanutto, Jonas K. Valiunas and G. Das, “Photonic device for the detection of trace gases, CAP Conference, Dalhousie University, Halifax, Nova Scotia, June 11-15, 2018.

55. G. Das, “Fiber Laser: Detection of trace gases (Invited Talk)”, 2017 International Annual Meeting, Managing Global Resources for a Secure Future, Tampa, Florida, USA, 22 October - 25 October, 2017.

54. G. Das, “Application of lasers in gas and chemical sensing (Invited Talk)”, CAP Conference, Queen's University, Kingston, 27 May - 2 June, 2017.

53. Joshua O. Trevisanutto G. Das, “Plasmonic nanostructure for the detection of chemicals”, CAP Conference, Queen's University, Kingston, 27 May - 2 June, 2017.

52. G. Das, “Fiber lasers: Detection of gases and chemicals (Invited Talk)”, CAP Conference, University of Ottawa, Ottawa, 12-17 June, 2016 (Cancelled).

51. Joshua O. Trevisanutto G. Das, “Fabrication of a Tapered Optical Fiber with Nanostructure Produced by Optical Tweezing”, Applications of Lasers for Sensing and Free Space Communications, OSA Laser Congress, Boston, USA, Oct. 30 to Nov. 4, 2016 (Published: OSA conference proceeding).

50. Joshua O. Trevisanutto, Chetna Sharma G. Das, “Development of a tapered fiber probe”, CAP Conference, University of Ottawa, Ottawa, 12-17 June, 2016.

49. J. Valiunas G. Das, “Detection of C2H2 at a concentration of ppmv levels using a fiber laser system”, CAP Conference, University of Ottawa, Ottawa, 12-17 June, 2016.

48. G. Das, “Detection of greenhouse gas (N2O) using intracavity absorption spectroscopy (ICAS)”, CLEO 2016, San Jose, USA, June 5-10, 2016 (Published: OSA conference proceeding).

47. G. Das, “Detection of Nitrous Oxide (N2O) Gas Using Intracavity Absorption Spectroscopy (ICAS)”, Department of Soil Science, UBC, 24th June, 2015.

46. G. Das, “Fiber laser: A new technique for the detection of trace gases (Invited Talk)”, Photonics North 2015, 9-11 June, Ottawa, Canada. (Published: IEEE conference proceedings)

45. J. Valiunas and G. Das, “Detection of Trace Gases using Fiber Laser Technology- Part 1”, CAP Congress, University of Alberta, Edmonton, Canada, June 13 - 19, 2015.

44. J. Valiunas and G. Das, “Detection of Trace Gas (N2O) using Fiber Laser Technology”, CAP Congress, University of Alberta, Edmonton, Canada, June 13 - 19, 2015.

43. J. Valiunas and G. Das, “Brillouin fiber laser using highly nonlinear Chalcogenide (AS2Se3) glass fiber”, CAP Congress, University of Toronto, Toronto, Canada, June 7 - 11, 2010.

42. J. Valiunas and G. Das, “Brillouin fiber laser”, Research and Innovation Week Exhibition 2010, Lakehead University, February 24, 2010.

41. Z. J. Chaboyer and G. Das, “Laser for trace gas detection”, Research and Innovation Week Exhibition 2010, Lakehead University, February 24, 2010.

40. G. Das,“250 mW output power single-longitudinal-mode single-wavelength fiber laser with a fiber Fabry-Perot filter”, PHOTONICS North 2009, Quebec, Canada, May 24-27, 2009.

39. P. J. Moore, Z. J. Chaboyer, and G. Das, “ Dual-Wavelength fiber laser”, 23rd National Conference on Undergraduate Research, University of Wisconsin, April 16-18, 2009.

38. Z. J. Chaboyer, P. J. Moore and G. Das, “Medium power single-wavelength fiber laser”, 23rd National Conference on Undergraduate Research, University of Wisconsin, April 16-18, 2009.

37. G. Das, P. J. Moore and Z. J. Chaboyer “A tunable high power single-wavelength fiber laser”, CAP congress, Laval University, Quebec, Canada, June 8-11, 2008.

36. G. Das and J. Valiunas,“A medium-power widely tunable single wavelength fiber laser”, Photonics North 2008, Montreal, Canada, June 2-4, 2008.

35. G. Das “Biophotonics-High Power Fiber Laser Applications”, Institute of Cancer Research meeting, Thunder Bay, Canada, 15th August, 2006.

34. G. Das, Z. Medendorp and J. Valiunas, “Multiwavelength fiber laser”, CAP congress, Brock University, Canada, 11-14th June, 2006.

33. G. Das, “Fiber laser and applications”, Lakehead University Biotechnology symposium and poster fair", Lakehead University lounge and Agora, 20th March, 2006.

32. G. Das, K. T. Leung and H. Schraft, “High power laser in Biotechnology”, AFMNET and CIPI meeting, Toronto, Canada, 11th January, 2006.

d. Graduate and Undergraduate Thesis

31. Joshua O. Trevisanutto, “Segmented hollow core photonic crystal fiber as a gas cell”, PhD, Chemistry and Material Science, Lakehead University, 2022.

30. Navneet Kaur, "Tweezing and manupulating nanomaterials on tapered optical fiber to develop surface-enhanced Raman Spectroscopy (SERS) substrate", MSc, Physics, Lakehead University, 2020.

29. Joshua O. Trevisanutto, “Plasmonic Nanostructure on a Tapered Fiber for Chemical Detection”, MSc, Physics, Lakehead University, 2017.

28. Jonas K. Valiunas, “Fiber laser system for the detection of trace gas”, PhD, Chemistry and Material Science, Lakehead University, 2017.

27. Joseph E. Navratil, “Tunable Pulsed Laser at 1.1µm”, MSc, Physics, Lakehead University, 2014.

26. Remy Philippe, “Tapered fiber and its applications”, Physics, Lakehead University, 2013.

25. Z. J. Chaboyer, “An ytterbium-doped fiber laser at 1.1 µm ”, MSc, Physics, Lakehead University, 2012.

24. Andrew Drainville, “A widely Tunable Fiber Laser”, Physics, Lakehead University, 2012.

23. J. K. Valiunas, “Tunable high-power fiber laser and its application to produce Brillouin fiber lasers”, Physics, Lakehead University, 2011.

22. Z. J. Chaboyer, “Tunable Single-Wavelength Fiber Laser for Trace Gas Detection”, Physics, Lakehead University, 2010.

21. M. Dastmalchi, “A multiwavelength erbium / ytterbium co-dopped fiber laser”, Physics, Lakehead University, 2007.

Publications (2000-2004)

a. Articles Published in Refereed Journals

20. G. Das and J. W. Y. Lit, “Multiwavelength fiber laser using a multimode elliptical core erbium-doped fiber” Microwave Opt. Technol. Lett., vol. 42, no. 2, pp. 124-128, 2004.

19. G. Das and J. W. Y. Lit, “Wavelength switching of a fiber laser with a Sagnac loop reflector”, IEEE Photon. Technol. Lett., vol. 16, no. 1, pp. 60-62, 2004.

18. G. Das and J. W. Y. Lit, “Sagnac loop reflector and its multiwavelength laser application”, Opt. Eng., vol. 42, no. 10, pp. 2880-2885, 2003.

17. G. Das and J. W. Y. Lit, “Ring resonator for multi-wavelength fiber laser using a Sagnac loop filter”, Opt. Eng., vol. 42, no. 8, pp. 2257-2262, 2003

16. G. Das and J. W.Y. Lit, “Multi-wavelength Fiber Laser using Sagnac loop filter”, Microwave and Opt. Technol. Lett., vol. 36, no. 3, pp. 200-2002 , 2003.

15. G. Das and J. W.Y. Lit, “Room temperature multi-wavelength operation of an elliptical core erbium-doped fiber laser”, Microwave and Opt. Technol. Lett., vol. 33, no. 3, pp. 184-186, 2002.

14. G. Das and J. W.Y. Lit, “L-band multi-wavelength erbium-doped fiber lasers using an elliptical fiber”, IEEE Photon. Technol. Lett., vol. 14, no. 5, pp. 606-608, 2002.

b. Papers Presented at Learned Society

13. G. Das and J. Lit, “An elliptical erbium doped multi-wavelength fiber laser”, Presented in the annual meeting of Canadian Institute for Photonic Innovations (CIPI), International Plaza Hotel, Toronto, Canada, May 22-23, 2001.

12. G. Das and J. Lit, “Multi-wavelength operation of an elliptical erbium –doped fiber laser”, presented in the conference of Canadian Association of Physicists, University of Victoria, Victoria, Canada, June 17-20, 2001.

11. G. Das and J. Lit, “Fiber with Multiple Claddings for Optical Communications and Sensing”, Presented in the conference of Canadian Association of Physicists, York University, Toronto, Canada, June 4-7, 2000.

10. G. Das and J. Lit, “Design of a Triple Clad Fiber for Lasers “, Presented in the annual meeting of Canadian Institute for Photonic Innovations (CIPI), Quebec City (University of Laval), Canada, June 12-13, 2000.

Publications (1996-1999)

a. Articles Published in Refereed Journals

9. G. Das and S.N.Sarkar, “A Simple Variational Prescription for Beam shaping to Achieve Spatial Solitary Propagation in Homogeneous Medium”, J. of Opt. Comm., vol. 20, no.4, 1999.

8. G. Das and S.N.Sarkar, “Analysis of Fundamental Modal Field Excitation and Confinement in Single-mode Graded index fibers Involving a novel simple Function”, J. of Opt. Comm., vol. 19, no.5, 1998.

7. G. Das, M.Sengupta, S.K.Mondal and S.N.Sarkar, “A Novel and Accurate Approximation for the Fundamental Mode in Single-mode fibers Having Arbitrary Index Profiles”, J. of Opt. Comm., vol.19, no.1, 1998.

6. G. Das and S.N.Sarkar, “Estimation of Dispersion Parameters Involving Peterman II Spot Size Using Near Gaussian Approximation in Single-mode Graded Index Fibers”, Opt., vol.36, no.9, 1997.

5. S. Gangopadhya, M. Sengupta, S.K. Mondal, G. Das and S. N. Sarkar, “Novel method for studying single mode fibers involving Chebysev technique”, J. of Opt. Comm., vol. 18, no. 2, 1997.

4. G. Das and S.N.Sarkar, “Variational Analysis of Single-mode Graded-Index Fibers based on a Novel Approximation of the Fundamental Modal Field”, Opt. Eng., vol.35, no.12, 1996.

b. Articles Published in Refereed Conference Proceedings

3. S.K.Mondal, G. Das and S.N.Sarkar, “Novel Switching Characteristics in Parabolic Nonlinearity Optical Couplers”, Proceedings of International Conference, Computer and Devices in Communication, held in Calcutta, India, January 14-17, 1998.

2. G. Das and S.N.Sarkar, “Two Parameter Novel Approximation of the Fundamental Modal Field for Single-mode Graded Index Fibers”, Proceedings of International conference on fiber optics and photonics, vol. 1, Photonics-96, India, 1996.

c. Papers Presented at Learned Society

1. G. Das and S.N.Sarkar, “Accurate Analytic Expression for Gain in a Pr⁺³ :ZBLAN fiber Amplifier Using Near Gaussian Function”, presented in National Symposium of the Optical Society of India on Optics and Opto-electronics, India, March 14-16, 1996.