1. Fiber Optic Sensor & Communication
2. Microwave Photonics
3. Signal Processing
4. Instrumentation

International Journal: 

1. Rani Ankita and Somnath Sengupta, “Design of a microwave photonic filter using FBG-based delay lines and the FIR filtering technique for photonic integrated circuits”, Applied Optics, Optica, vol 64., no.3, pp. 507-516, 13 Jan’ 2025. DOI: https://doi.org/10.1364/AO.537334

2. Rani Ankita and Somnath Sengupta, “Design of Microwave Photonic Filter Using Zero-Pole Placement Method With FBG Based Delay Lines”, Microwave and Optical Technology Letters, Wiley, vol. 67, no.1, p. e70093 (13 pp.), 07 Jan’ 2025. DOI: https://doi.org/10.1002/mop.70093

3. Rani Ankita, S K Ghorai and Somnath Sengupta, “Vehicle flow indication and identification using FBG sensors”, Physica Scripta, IOP, vol. 99, no.12, p.125543 (12 pp.), 19 Nov’ 2024. DOI: 10.1088/1402-4896/ad8f6c

4. Sunil Kumar, S K Ghorai and Somnath Sengupta, “Fiber Bragg grating sensor interrogation using edge filtering with long period grating modulated light source”, Optical and Quantum Electronics, Springer, vol. 55, p. 847 (10 pp.), Jul 2023. DOI: https://doi.org/10.1007/s11082-023-05120-0

5. Sunil Kumar and Somnath Sengupta, "Machine learning based algorithm for multi-FBG peak detection using generative adversarial network”, Journal of Optoelectronics & Advanced Materials, vol. 25, No. 5-6, p. 273 - 281, May–June 2023. Link: https://joam.inoe.ro/articles/machine-learning-based-algorithm-for-multi-fbg-peak-detection-using-generative-adversarial-network/fulltext

6. Sunil Kumar and Somnath Sengupta, "Detection of peak wavelength of multi-FBG using higher-order derivative of wavelets multiresolution analysis and maximum likelihood estimation." Optics Communications, Elsevier, vol 544, p.129621, May 2023. DOI: https://doi.org/10.1016/j.optcom.2023.129621

7. Sunil Kumar, Somnath Sengupta, “Adaptive and precise peak detection algorithm for fibre Bragg grating using generative adversarial network”, Opto-electronics Review, Polish Academy of Science, vol. 30, p. e144227 (7 pp.),  Dec 2022. DOI: https://doi.org/10.24425/opelre.2022.144227

8. Sunil Kumar, Somnath Sengupta, “Efficient detection of multiple FBG wavelength peaks using matched filtering technique”, Optical and Quantum Electronics, Springer, vol. 54, p. 89 (14 pp.), Jan 2022. DOI: https://doi.org/10.1007/s11082-021-03460-3

9. Somnath Sengupta, S. K. Ghorai, P. Biswas, “Design of superstructure fiber Bragg grating with efficient mode coupling for simultaneous strain and temperature measurement with low cross-sensitivity,” IEEE Sensors Journal, IEEE, vol. 16, no. 22, pp. 7941-7949, 2016. DOI: 10.1109/JSEN.2016.2611002

10. Somnath Sengupta, S. K. Ghorai, “Ultra-narrow band optical comb filter using Gaussian-sampled fiber Bragg grating with periodic chirp effect,” Optical and Quantum Electronics, Springer, vol. 48, p. 482 (13pp.), 2016. DOI: 10.1007/s11082-016-0754-0

11. Somnath Sengupta, S K Ghorai, “An efficient method for determining transmission characteristics of superstructure fiber Bragg grating and its use for multiparameter sensing”, Optical Fiber Technology, Elsevier, vol. 21, pp. 146–153, 2015. DOI: http://dx.doi.org/10.1016/j.yofte.2014.11.009

12. Somnath Sengupta and S K Ghorai, “DC Index Shifted Dual Grating Based Superstructure Fiber Bragg Grating as Multichannel FBG and Multiparameter Sensor”, International Journal Of Control Theory And Applications, vol.8, No.1, pp. 208-212, Jan-June 2015. DOI not available

13. D. Kumar, S. Sengupta, S. K. Ghorai, “Distributed strain measurement using modal interference in birefringent optical fiber”, Measurement Science & Technology, Institute of Physics, vol. no. 19, p. 065201 (8pp), 2008. DOI: 10.1088/0957-0233/19/6/065201

International Conferences:

1. Rani Ankita and Somnath Sengupta, “Advancements in Optical Low-pass Filter Design and Integration using Opti-system”, International Conference on Electrical, Computer and Communication Technologies (IEEE ICECCT 2024), Chhattisgarh Swami Vivekanand Technical University (CSVTU), Bhilai, Chhattisgarh, IEEE Proceeding, 26 - 28, June 2024. 
2. Rani Ankita and Somnath Sengupta, “Advancements in Digital Signal Processing: Design and Implementation of IIR Bandpass Optical Filter using Optisystem”, International Conference on Advances in Modern Age Technologies for Health and Engineering Science (AMATHE 2024), PES Institute of Technology & Management, Shivamogga, Karnataka, IEEE Proceeding, Bangalore  Section, 16 - 17, May 2024.
3. Sunil Kumar, and Somnath Sengupta, "FBG Peak Wavelength Detection Using Transfer Learning-Based Machine Learning Method.", IEEE 3rd Global Conference for Advancement in Technology (GCAT). IEEE Proceeding, Bangalore, 7-9 Oct, 2022.
4. Sunil Kumar, Somnath Sengupta, “Multi Peak Detection Algorithm of Fiber Bragg Grating using Mexican Hat Wavelets and Hilbert Transform”, IEEE India Council International Subsections Conference (INDISCON), IEEE Proceeding, Bhubaneswar, 15-17 July 2022.
5. Somnath Sengupta, S K Ghorai, “High Performance Optical Comb Filter using Full duty cycle based Periodically Chirped- Sampled Fiber Bragg Grating”, IEEE Proceeding, ICMAP2015, ISM Dhanbad, 11-13 Dec, 2015.
6. S.K. Ghorai, S. Sengupta, Soumya Sidhishwari and D R Roy, “A Hybrid Fiber Optic Sensing System for Structural Health Monitoring”, IEEE Sensors 2010, Hawaii, USA. 1-2 Nov, 2010.
7. Soumya Sidhishwari, S. Sengupta and S.K.Ghorai, “Higher order modal interference in optical fiber for structural health monitoring”, International Conference on Fiber Optics &  Photonics (PHOTONICS- 2008),Organized by  IIT Delhi, Delhi, Dec. 15-17, 2008.
8. S.K. Ghorai, Soumya Sidhishwari and S. Sengupta, “Improved least squares based autoregressive model for phase extraction in distributed fiber optic interferometric sensors”, International Conference on Optoelectronics, fiber optics & photonics (PHOTONICS- 2006), Hyderabad, Dec. 13-16, 2006.

National Conferences:

1. S.K.Ghorai, Dilip Kumar and S.Sengupta, “Distributed strain sensing using fiber mode-mode interference”, Proc. of National Conf. on Advances in Sensors for Aerospace Applications, held at Research Center Imarat, Hyderabad, Dec 14 –15, 2007.
2. S. Sengupta, D. Kumar, S. K. Ghorai, “Distributed Fiber Optic Strain Sensing in a Simply Supported Beam using Wavelet Transform,” National Conference: Advances in Electronic Materials and Devices-2006, Guru Ghasidas University, Bilaspur, India, 5-6 March 2006.

Ph D Supervision:

Thesis Topic: “Development of Peak Detection Techniques for Fiber Bragg Grating Sensors using Signal Processing and Machine Learning”, Ph.D. awarded to Sunil Kumar (PHD/EC/10006/19), 22’Dec'2023.

IEEE Member (#99150626)

1. Currently working in a project as PI, entitled, “Fiber Bragg Grating Interrogation using Microwave Photonic Filter with Machine Learning for Structural Health Monitoring”, under the project “Development of Data Science Methods for Cyber Physical System”, in collaboration with, TIH-IDEAS: ISI-Kolkata, NM-ICPS in Data Science, DST, GoI. (Sanctioned on: 23 Sept’ 2022, Sanctioned Amount: 4.58 Lakhs). https://www.ideas-tih.org/s-projects-basic

2. Completed the project as CO-PI: “Embedded Fiber Optic Sensor based Instrumentation System for Structural Health Monitoring”, Funding Agency: ISRO, VSSC, RESPOND, 2009-2012.