• Optoelectronics,
• Fiber optic Communication,
• Optical Sensors,
• Optical networking,
• Data Communication,
•  Optical Wireless Communication

• National scholarship in the UG level ( B.Sc(Hons.))
• Senior Scientist award by DST for International Travel

1. Ajit Kumar,N. Sharan, S. K. Ghorai, “ Performance analysis of downlink multipath multi?user NOMA?VLC system”, Optical and Quantum Electronics, vol. 54, p 660, 2022, doi.org/10.1007/s11082-022-04068-x (SCI).
2.  Nishant Sharan, S. K. Ghorai, Ajit Kumar, “LED non?linearity mitigation in a NOMA?OFDM VLC system using a union of precoder and companding”, Optical and Quantum Electronics, vol. 54, p 648, 2022, doi.org/10.1007/s11082-022-04043-6 (SCI)
3. Sharan N, Ghorai S K. Hybrid scheme of precoder with μ-law compander for PAPR reduction and nonlinearity improvement in ADO-OFDM system. Int J Commun Syst. 2021;34(16):e4961. doi:10.1002/dac.4961(SCI)
4. Nishant Sharan, S.K Ghorai, " PAPR Reduction and Non-linearity Alleviation using Hybrid of Precoding and Companding in a Visible Light Communication (VLC) System", Optical and Quantum Electronics, vol. 52, p 304, 2020,  doi.org/10.1007/s11082-020-02426-1 (SCI)
5. A.Kumar, S.K Ghorai,  "BER Performance Analysis of OFDM based Integrated PLC and MIMO-VLC System", IET Optoelectronics, March 2020, DOI:  10.1049/iet-opt.2019.0132 (SCI)
6. A. Kumar and S. K. Ghorai, "Effect of LED Radiation Pattern on BER Performance in Indoor Multipath MIMO-VLC System,” Wireless Personal Communications, pp.1-18, 2020. DOI: 10.1007/s11082-018-1656-0 (SCI)
7. A. Kumar and S. K. Ghorai, “High-gain and volume-efficient concave–convex lens for multiple-input multiple-output visible light communication system,” Optical Engineering, vol. 59, no. 3, p. 035106, 2020. DOI: 10.1117/1.OE.59.3.035106 (SCI).
8. Ramtanu Mukherjee, S. K. Ghorai, Bharat Gupta, and Tapas Chakravarty,“Development of a Wearable Remote Cardiac Health Monitoring with Alerting System,” Instruments and Experimental Techniques, Vol. 63, No. 2, pp. 273–283, 2020. DOI: 10.1134/S002044122002013X (SCI)
9. Soumya Sidhishwari, Mainak Basu, S.K. Ghorai,  “A modal interference-based Fiber Optic Sensor for dual parameter measurement using an Artificial Neural Network”, Optical Fiber Technology, vol.50,p 216-224, 2019 (SCI).
10. Ajit Kumar, S.K.Ghorai ,“Effect of multipath reflection on BER performance of indoor MIMO-VLC system”, Optical and Quantum Electronics, vol. 50:388 p -1-18 (SCI)
11. M.Basu, S. K. Ghorai “An optical soft-sensor based shape sensing using a bio-inspired pattern recognition technique to realise fly-by-feel capability for intelligent aircraft operation”, The Aeronautical Journal, November 2018 vol.  122 no 1257, p-1734-52 (SCI-E).
12. 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, vol. 48, p. 482(13pp.), 2016(SCI).
13. Somanth Sengupta, S. K. Ghorai, “Design of Superstructure Fiber Bragg Grating with Efficient Mode Coupling for Simultaneous Strain and Temperature Measurement with low Cross-sensitivity”, IEEE Sensors J., vol. 16(22), 2016 (SCI) .
14. Somnath Sengupta, 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 (IJCTA), Vol. 8, 2015, pp. 208-212 (SCOPUS).
15. S 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, Vol. 21, 2015, pp. 146-153. doi:10.1016/j.yofte.2014.11.009(SCI)
16. Mainak Basu, S. K. Ghorai, "Sequential Interrogation of Multiple FBG Sensors using LPG modulation and an Artificial Neural Network," Meas. Sci. Technol. vol. 26(4), 2015 (SCI
17.  Mainak Basu, S. K. Ghorai, "Strain Sensing in FRP Laminates using Embedded Fiber Bragg Grating Sensor", Fiber and Integrated Optics, vol. 33(4), August 19, 2014, pp. 279-298. doi: 10.1080/01468030.2014.906686 (SCI)
18. A. Mustafi, S.K.Ghorai, “A novel blind source separation technique using fractional Fourier transform for denoising medical images.” Optik, Vol. 124, 2013, pp. 265-271. doi:10.1016/j.ijleo.2011.11.052(SCI)
19. Partha Paul, Balbeer S Rawat, S.K. Ghorai, “Dynamic Traffic Grooming in WDM Optical Networks with Full Wavelength Conversion and Grooming Devices at Max-Connectivity Nodes,” Intl. J. Comp. Appl., Vol. 57:11, 2012, pp. 19-29. doi: 10.5120/9158-3198
20. Partha Paul, Balbeer Singh Rawat, S.K. Ghorai, “Traffic Grooming in WDM optical network with grooming resources at Max-connectivity nodes,” Opt. Fiber Technol., Vol. 18, 2012,  pp. 490-497. doi: 10.1016/j.yofte.2012.07.018(SCI)
21.  A.K.Sharma, D.Shukla, S. K. Ghorai,”Simultaneous measurement of strain and curvature using a FBG and CFBG,” Intl. J. of Earth Sciences and Engineering, Vol.: 4(6), pp. 1-3, 2011.
22. S.K.Ghorai, Soumya Sidhishwari, S. Konar, “Phase retrieval in optical fiber modal interference for structural health monitoring,” Optics Communications, Vol. 283, 2010, pp.: 1278– 1284.  oi: 1016/j.optcom.2009.12.011 (SCI)
23.  S. Konar, S.K. Ghorai, Rakhi Bhattacharya, “Highly birefringent microstructure fiber with zero dispersion wavelength at 0.64 μm”, Fiber and Integrated Optics,Vol.28, 2009, pp.:138- 145. doi:  0.1080/01468030802582668 (SCI)
24.  Dilip Kumar, S.Sengupta, S.K.Ghorai, “Distributed strain measurement using modal interference in birefringent optical fiber”, Measurement Science and Technology, Vol. 19, 2008, 065201-8. doi: 10.1088/0957-0233/19/6/065201 (SCI)
25. S. K. Ghorai, Dilip Kumar, Soumya Sidhishwari, “Phase extraction in two mode birefringent optical fiber and its application in quasi-distributed strain sensing” Proc. of  SPIE, Vol.6189, 61891X, 2006. doi: 10.1117/12.662474
26.  S.K.Ghorai, Dilip Kumar, Baljeet K Hura, “Strain Measurement in a Mach-Zehnder Fiber Interferometer Using Genetic Algorithm”, Sensor and Actuators A: Physical, Vol. 122, 2005, vol.: 215 – 221. doi:10.1016/j.sna.2005.05.010 (SCI)
27. S.K.Ghorai, S.Narayan., “Data-dependent System approach for Strain measurement in    Interferometric fiber Optic system”, Optics and Laser Technology, Vol. 36, 2004, pp 571-574. doi: 10.1016/j.optlastec.2004.01.003 (SCI)
28.  S.K.Ghorai, Shoumik Maiti, Harpreet Singh, Rana Bhowmick, “Effect of Cross Sensitivity in low coherence optical fiber Interferometric fiber sensor”, Proc. SPIE, Vol.  4417, 2001, pp. 515-519. doi:  10.1117/12.441344
29.  S.C.Som, S. K. Ghorai, A. Satpathi, “Visualization of Photorefractive Grating in BSO”, Optical and Quantum Electronics, Vol. 25, 1993, pp. 241-253. doi: 10.1007/BF00419001 (SCI)
30.  S. C. Som, A. Satpathi, S. K. Ghorai, “The Finite-Conjugate Self-imaging and Generalized Lau Effect due to Complex Gratings, Application of Visualization of the PRG in a BSO Crystal”, J. of Modern Optics, Vol. 39, 1992, pp. 1501-1515. doi: 1080/09500349214551521 (SCI)
31.  S. C. Goel, S. K. Ghorai et al., “Operation & Noise Performance of Interferometric Optical Fiber Temperature Sensor”, J. of Instruments and Electronic Developments, 1991

International Conference:

1. N. Sharan, S. K. Ghorai and A. Kumar, "PAPR reduction using a Precoder and Compander combination in a NOMA-OFDM VLC system," 2022 2nd International Conference on Artificial Intelligence and Signal Processing (AISP), 2022, pp. 1-4, doi: 10.1109/AISP53593.2022.9760659.
2. N. Sharan, S. K. Ghorai and A. Kumar, "PAPR Reduction using blend of Precoder and μ-law Compander in HACO System," 2021 IEEE 2nd International Conference on Applied Electromagnetics, Signal Processing, & Communication (AESPC), 2021, pp. 1-5, doi: 10.1109/AESPC52704.2021.9708501.
3. A. Kumar , S. K. Ghorai, A. chaudhary, “BER Performance of hybrid PLC-VLC system with OFDM,” Presented at the 2020 International Conference on Computer, Electrical & Communication Engineering (ICCECE), Techno India University, Kolkata, Jan. 17-18, 2020.
4. N. Sharan, S. K. Ghorai and A. Kumar, “Peak-to-Average Power Ratio (PAPR) Reduction Using Combination of Precoding and Companding Techniques for VLC OFDM Systems” , 2019 TEQIP III Sponsored International Conference on Microwave Integrated Circuits, Photonics and Wireless Networks (IMICPW), Tiruchirappalli, India, 2019, pp. 149-153.
5. A. Kumar and S. K. Ghorai, "Performance of MIMO-VLC System for Different Radiation Patterns of LED in Indoor Optical wireless Communication System," 2019 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), GOA, India, 2019, pp. 1-5.
6. Ajit Kumar and S. K. Ghorai, BER performance Analysis of Indoo MIMO-VLC System for Multipath Reflection,  2018 Technologies for Smart-City Energy Security and Power (ICSESP), Bhubaneswar, 2018, pp. 1-5
7.   Shivam Shekhar, Ajit Kumar and S. K. Ghorai, Analysis of ICA MIMO-OFDM VLC System With Different FOV Based Photodetectors, IEEE International Conference on Recent Trends in Electronics Information Communication Technology, Sri Venkateshwara College of Engineering, Bangaluru, May 19-20, 2017.
8.   Ajit Kumar and S. K. Ghorai, Reduction of Channel Correlation for Multiuser- MIMO System in Visible Light Communications, IEEE Sponsored International conference on signal processing and communication, Jaypee Institute of Information Technology, Noida, Dec.  26-28, 2016.
9. Somnath Sengupta, S. K. Ghorai, “High performance optical comb filter using full duty cycle based periodically chirped sampled fiber Bragg grating,” Proc. Of the Intl conf. on Microwave and Photonics (ICMAP-2015), ISM Dhanbad, 11-13 Dec. 2015.
10. Garima Singh, Mainak Basu & S K Ghorai, "Interrogation of FBG sensors using LPG and Artificial Neural Network", Proc. of the IEEE Sponsored Intl. Conf. on Green Computing, Communication and Electrical Engineering (ICGCEE-2014), held at Coimbatore, March 6-8, 2014. doi: 10.1109/ICGCCEE.2014.6922439
11.  Neha Niharika, Mainak Basu & S. K. Ghorai, "Detection and Monitoring of Multiple cracks using distributed fiber Optic Sensor" - Accepted for Oral Presentation, IEEE sponsored International Conf. on Advanced Communication, Control and Computing Technologies (ICACCCT-14), held at Ramanathapuram, Tamil Nadu, May 8-10, 2014. doi: 10.1109/ICACCCT.2014.7019204
12. Mainak Basu, Anupriya Singh & S K Ghorai, "Structural Health Monitoring of composite structures based on FBG sensor system and Support Vector Regression", Proc. of Intl. Conf. on Innovation in Engineering and Management (ICIEM-2013), held at Birla Institute of Technology, Patna Extension centre, Patna, Feb. 22-23, 2013.
13.   Ajit Kumar, S.K.Ghorai,”FBG based Real Time Derailment Assessment in Railways”, Proc. Of Intl. Conf. on Advances in Electronics, Electrical and Computer Engineering (EEC-2013), held at Dehradun, India, June, 22-23, 2013. doi:10.3850/ 978-981-07-6935-2_70
14. P. Paul, Mainak Basu, S. K. Ghorai, "Max-Connectivity Grooming in WDM mesh networks for cost effective network resource utilization", Proc. of Diamond Jubilee Zonal Seminar on Advances of Electronics, Information and Communication Technology in India, Ranchi, July 13-14, 2013.
15. S.K. Ghorai, S. Sengupta, Soumya Sidhishwari, D.R.Roy “A Hybrid Fiber Optic Sensing System for Structural Health Monitoring”, Proc. of The IEEE   SENSORS CONFERENCE, Hawaii, U.S.A., November 1-4, 2010.
16. Abhijit Mustafi, S. K. Ghorai, “A Genetic Algorithm Approach to Image Separation in the Fractional Fourier Domain”, Proc. of The International Conference on Fiber Optics and Photonics, PHOTONICS-10, Indian Institute of Technology, Guwahati, India, December 11-15, 2010.
17. Soumya Sidhishwari, S.K.Ghorai, “Simultaneous Measurement of Strain and Temperature using Modal Interference in Birefringent Fiber”, Proc. of The International Conference on Fiber Optics and Photonics, PHOTONICS-10, Indian Institute of Technology, Guwahati, India, December 11-15, 2010.
18. Priyank Kumar, M.V. Rajashekhar, S.K. Ghorai, “Multi-Parameter Sensing System Using Sampled Fiber Bragg Grating”, Proc. of International Conference on Optics & Photonics ICOP-2009, Central Scientific Instruments Organisation (CSIO), Chandigarh, India, October 30-November 1, 2009.
19. 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.
20. Partha Paul, S. K. Ghorai, “Dynamic Routing and Wavelength Assignment Problem solving in Optical Network Using Multi-Objective Genetic Algorithm” Proc. Of International Conference on Optoelectronics, Fiber Optics & Photonics (PHOTONICS-2006), Hyderabad, Dec. 13-15, 2006.
21. S.K. Ghorai, Soumya Sidhishwari, Somnath Sengupta, “Improved  least squares based autoregressive model for phase extraction in distributed Fiber optic interferometric sensors” Proc. in International Conference on Optoelectronics, Fiber optics & photonics (PHOTONICS- 2006), Hyderabad, Dec. 13-15, 2006.
22. S. K. Ghorai, Dilip Kumar, Soumya Sidhishwari, “Phase extraction in two mode birefringent optical fiber and its application in quasi- distributed strain sensing” Proc. of  International Conference on        PHOTONICS EUROPE-06,  Strasburg, France, April 3-7, 2006.
23. S.K.Ghorai, Dilip Kumar, P. Mondal, “Genetic Algorithm Approach for phase extraction in Interferometric Fiber Optic Sensor”, Proc. of International Conference on Optoelectronics, fiber optics & photonics (PHOTONICS- 2004), Cochin University of Science and Technology, Kochi(Ernakulam), Dec. 9-11, 2004.
24. S.K.Ghorai, Dilip Kumar “Quasi Distributed Strain Sensing in Cantilever Beams by use of Modal Interference”, Proc. of International Conference on Optoelectronics, fiber optics & photonics (PHOTONICS-2004), Cochin University of science and Technology, Kochi(Ernakulam), Dec. 9-11, 2004.
25. S.K.Ghorai, A.Dixit, Kirti Bajaj, P.K.Upadhyay, “Routing Of Optical Signals In Fiber Interconnections Using Photorefractive Crystal”, Proc. of International Conf. on Optoelectronics, Fiber Optics, and Photonics “Photonics 2002” ,TIFR, Mumbai, Dec 16-18, 2002.
26. S.K.Ghorai, A.Dixit, P.K.Upadhyay, Kirti Bajaj, “Phase Retrieval by Data-Dependent System Method in Low Coherence Optical Fiber Interferometric Sensor”, Proc. Of International Conf. On Optoelectronics, Fiber Optics, and Photonics “Photonics 2002”, TIFR, Mumbai, Dec 16-18, 2002.
27. S. K. Ghorai, Ipsita Kumar, Deepika Tiwari, Mayuri Ghose, “ Phase extraction in low coherent optical fiber interferometric sensor”, Proc.of International Conf. On Control, Instrumentation and Information Communication, Kolkata, Dec. 13-15, 2001.
28. S. K. Ghorai, Shoumik Maiti, P. Maji, N. R. Srivastava, “Multiobjective Genetic Algorithm For Routing And Wavelength Assignment in Optical Network”, Proc. of International Conf. On Broad Band Optical Fiber Communication Technology, N.M.U., Jalgaon, India, pp 249-256, 2001.
29. S. K. Ghorai, S. Maiti, S. C. Som, “Collective Genetic Algorithm for Higher Order Refractive Index Modulation Components in Photorefractive BSO”, Proc. of International Conf. on Fiber Optics and Photonics  “Photonics 2000”, Calcutta, Dec.18-20, 2000.
30. S.K.Ghorai, S. C. Som, "Nonlinear Structure of Photorefractive grating in BSO Crystal", Proc. of International Conf. on Optics & Opto-electronics, Dehra Dun, India, Dec.1998.

National Conference:

1.  P. Paul, Mainak Basu, S. K. Ghorai, "Max-Connectivity Grooming in WDM mesh networks for cost effective network resource utilization", Proc. of Diamond Jubilee Zonal Seminar on Advances of Electronics, Information and Communication Technology in India, Ranchi, July 13-14, 2013.
2.  Soumya Sidhishwari, S. K. Ghorai, “Strain Measurement in a Mach-Zehnder Fiber Interferometer using Data Dependent System Method”, Proc. of The National Conference on Computing, Communication and Sensor Network (CCSN-2011) PIET, Rourkela, October 29-30, 2011.
3.  Mainak Basu, Ashish Kumar Sharma, S. K. Ghorai, “Real-Time Health Monitoring of Composite Structures using Embedded Fiber Bragg Grating Sensor”, Proc. Of The National onference on Frontiers in Electronics, Communication and Instrumentation technology (FECIT-2011), Dhanbad, November 3-4, 2011.

4.  Partha Paul, Alok Talekar, S.K.Ghorai, “Traffic grooming in broadband optical networks using limited grooming resources”, Proc. of National Conference on NASDECC-08, Birla Institute of Technology, Mesra, Ranchi, November 3-5, 2008.

• The Optical Society of India
• Indian Society for Technical Education
• Institution of Electrical & Electronic Engineers (IEEE)

• The Institution of Engineers (India): IEI,
• The Institution of Electronics & Telecommunication Engineers (IETE)
• The Optical Society of India