Biswajit Pathak

Announcements

Awards

Received the Most Popular Activity Award for outstanding contribution as an Event Officer of the Holography and Diffractive Optics Technical Group, OPTICA – one of the world’s leading Optics and Phot…

Received the Most Popular Activity Award for outstanding contribution as an Event Officer of the Holography and Diffractive Optics Technical Group, OPTICA – one of the world’s leading Optics and Photonics Society (2026).
Received media coverage (The Assam Tribune - 21 May, 2026) for developing a novel Adaptive Optics system at IIST from scratch that is capable of correcting complex aberrations in real time, and also the paper is published in reputed Q1 journal.
Received media coverage (The Assam Tribune - 24 February, 2025) for developing two advanced and first of its kind optical systems at IIST – Multiplexed Wavefront Sensing and High Resolution Imaging Systems, and also both the papers are published in reputed Q1 optics journal.
Awarded the prestigious and competitive Ramanujan Fellowship by Science and Engineering Research Board (SERB-DST), Govt. of India.
Served as Guest Editor for the special issue on Diffractive Optics - Current Trends and Future Advances by Photonics Journal, MDPI Publication.
Invited to review for the prestigious Siegman International School on Lasers organised by Optica and hosted by Dublin City University, Ireland.
Single authored work on dual sensor, entitled “Simultaneous Realisation of Zonal and Modal Wavefront Sensing Using Programmable Multiplexed Grating Patterns”, Optics Express, Vol. 30(11), 17953-17966 (2022), has been selected as Editor's Pick that serve to highlight articles with excellent scientific quality and are representative of the work taking place in a specific field (here Holography, Gratings, and Diffraction).
Received the prestigious Humboldt meets Leibniz Award to present a work on compressive imaging at the symposium “Humboldt meets Leibniz – Emerging Topics in Optics and Photonics”, organized by Leibniz University and the Volkswagen Foundation, supported by the Alexander von Humboldt Foundation, Hannover, Germany.
Selected as an Event Officer for Optica (leading society of Optics and Photonics, formerly OSA) in the Holography and Diffractive Optics technical group.
Selected for Reviewer Recognition Certificate and Lapel Pins for reviewing 8 journals of Optica Publishing Group (leading society of Optics and Photonics, formerly OSA Publishing) in a single year (2021).
Invited as a Resource Person to deliver a talk on ‘Patents’ at the ‘One Day International Webinar on Intellectual Property Rights (IPR)', organized by Central Library in collaboration with IQAC, Lalbaba College, Kolkata, India.
Member of the Scientific Review Committee of 'Medical Image Understanding and Analysis (MIUA - 2021)' conference, organized by University of Oxford, Oxford, UK.
Invited Talk on “Adaptive Optics in Ophthalmology: Principle, Design and Implementation”, in the online conference series: optics is not only about optics anymore, organized by SPIE IIT Guwahati Student Chapter, Assam, India.
Selected as College Advisor (Research Member of Common Room) of Kellogg College, University of Oxford, Oxford, UK.
Invited Guest Speaker for the paper “Optimizing image quality in non-confocal AOSLO imaging using a dynamically reconfigurable aperture pattern” in the XII Workshop on Adaptive Optics for Industry and Medicine (TU Delft), organized by Technical University of Delft, Delft, Netherlands.
Selected as Young Researcher Invited Speaker for the paper “Improvement in Error Propagation in the Shack-Hartmann type Zonal Wavefront Sensors”, JOSA A, Vol. 34(12), 2194-2202 (2017)” at the 10th International Conference on Lasers, Optics & Photonics, organized by Conference Series, Los Angeles, USA.
Received Third Best Poster Presentation Award for the paper entitled “Zonal Wavefront Sensing with Enhanced Spatial Resolution and Improved Centroid Detection Accuracy”, in the International Topical Meeting on Applied and Adaptive Optics, (INTOPMAA), organized by IIST, Kerala, India.
Received Departmental (Physics) Best Paper Award for the paper entitled “Liquid Crystal Spatial Light Modulator Based Wavefront Sensing and its Application”, in the Research Conclave, organized by IIT Guwahati, Assam, India.
Received Optical Society of India Second Best Contributory Paper Award in the Oral Session for the Paper entitled “Spatial Resolution Enhancement in a Grating Array Based Zonal Wavefront Sensor”, in the International Conference on Light- and Light-based Technology, held at Tezpur University, Assam, India.
Received Optical Society of India Second Best Contributory Paper Award in the Poster Session for the Paper Entitled “Zonal Wavefront Sensing with Improved Accuracy”, in the International Conference on Light- and Light-based Technology, held at Tezpur University, Assam, India.
Received 1st Runner-up for the Paper entitled “Wavefront Sensing Using Computer Generated Holography Technique”, in the Research Conclave organized by IIT Guwahati, Assam, India.
Received SPIE Student Officer Travel Grant (USD 2800) to attend one of the World’s Largest Optics and Photonics Conference “SPIE Photonics West-2016” at San Francisco, California, USA, organized by SPIE.
Selected for the prestigious Newport Spectra-Physics Research Excellence Travel Award (USD 750) to attend “SPIE Photonics West-2016” at San Francisco, California, USA, organized by SPIE.
Selected for the International Travel Support from DST-SERB to attend “SPIE Photonics West-2016” at San Francisco, California, USA, organized by SPIE.
Won Cash Prize of Rs. 20, 000/- for the project proposal entitled “Development of a Bio-speckle Analyser with an Edge-detector Operator” in the “GBP`s Talent Search Contest on Innovative Research Ideas Leading to Entrepreneurial Venture in Biotechnology and Allied Areas” in the Assam Biotech Conclave, organized by Guwahati Biotechnology Park, IITG, Assam, India.
Selected as the Founder President of SPIE IIT Guwahati Student Chapter.
The paper entitled “Improved Wavefront Reconstruction Algorithm for Shack-Hartmann Type Wavefront Sensors”, Journal of Optics (IOP), Vol. 16 (5) 055403 was selected as the Journal of Optics Paper of the Week during 18-25, April 2014.
Received Best Paper Award (Gold Medal) in the Optical Instrumentation & Techniques category for the paper entitled “Zonal Wavefront Estimation Using an Array of Hexagonal Grating Patterns”, in the OPTICS’14: International Conference on Light, held at Kerala, India.
Received Best Oral Presentation Award in the Optical Instrumentation and Optical Metrology category for the paper entitled “An Improved Zonal Wavefront Reconstructor Slope Geometry”, in the XXXVII National Symposium of Optical Society of India, held at Pondicherry, India.
Received Optical Society of America Best Student Contributory Paper Award for the paper entitled “An Improved Slope Model for Zonal Wavefront Reconstruction”, in the First IITG OSA Student Chapter Workshop on Optics, held at IIT Guwahati, Assam, India.

Dr. Biswajit Pathak
Visiting Faculty

Interdisciplinary Block (D1), Room No.: R206

biswajitpathak [at] iist.ac.in
(+91) 471-2568634

Department

Physics

Research interests

Adaptive Optics, Diffractive Optics, Computer Generated Holography, Retinal Imaging, Wavefront Sensors, Free-space Optical Communication, High Resolution Imaging.

Academic Background

Indian Institute of Technology Guwahati, Assam, India
Doctor of Philosophy (Ph. D.)
Department of Physics
Thesis Title: Development of a Zonal Wavefront Sensor with Enhanced Performance Using a Reconfigurable Array of Binary Diffraction Gratings

Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand, India
Master of Science (M. Sc.)
Applied Physics (First Class)

Cotton College (Gauhati University), Guwahati, Assam, India
Bachelor of Science (B. Sc.)
Physics Major (First Class with Distinction)

Work Experience

Indian Institute of Space Science and Technology, Thiruvananthapuram, India
Ramanujan Fellow (June 2023 - ongoing)
Department of Physics
Proposed Work: Development of Next Generation Adaptive Optics System with Programmable Control Parameters (as PI)

Kellogg College, University of Oxford, Oxfordshire, United Kingdom
College Advisor (Sept 2020 – May 2023)
Academic/Pastoral Guidance to M.Sc. and DPhil Students

Research Experience

University of Oxford, Oxfordshire, United Kingdom
Post Doctoral Research Scientist (PDRS, Aug 2018 - May 2023)
Medical Sciences Division and
Mathematical, Physical and Life Sciences Division
Proposed Work: Development of a Light Modulator Technology to Control the Spatio-Temporal Coherence of Light Source [EPSRC Grant]
Proposed Work: Design and Implementation of Adaptive Optics Based Multimode Fibre Endo-Microscopy System [EPSRC IAA Technology Grant]
Proposed Work: Development of a Programmable Aperture Based Imaging System for High Resolution In-Vivo Imaging of the Human Retina in an Adaptive Optics Scanning Laser Ophthalmoscope [Fight for Sight, John Fell and Welcome Trust Grant].

Indian Institute of Science Education & Research Mohali, Punjab, India
Post Doctoral Fellow (PDF, Jan 2018 - Aug 2018)
Physical Sciences Division
Proposed Work: Development of an Optical System to Focus Light Beam in a Scattering Medium

Jan 2026 – May 2026 (IIST)

PH622: Adaptive Optics (M.Tech/DD B.Tech, Opt. Eng.)
PH642: Adaptive Optics Lab (M.Tech/DD B.Tech, Opt. Eng.)
PH241: Optics Lab II (DD B.Tech, Opt. Eng.)

July 2025 – Dec 2025 (IIST)

PH411: Optical Engineering Fundamentals (M.Tech/DD B.Tech, Opt. Eng)
PH637: Electromagnetism and Optics (M.Tech/DD B.Tech, Quantum Tech.)
PH631: Optics and Optoelectronics Lab (M.Tech/DD B.Tech, Opt. Eng.)

Jan 2025 – May 2025 (IIST)

PH622: Adaptive Optics (M.Tech/DD B.Tech, Opt. Eng.)
PH642: Adaptive Optics Lab (M.Tech/DD B.Tech, Opt. Eng.)

July 2024 – Dec 2024 (IIST)

PH613: Optical Fabrication and Testing (M.Tech/DD B.Tech, Opt. Eng., shared)
PH637: Electromagnetics and Optics (M.Tech/DD B.Tech, Opt. Eng., shared)

Jan 2024 – May 2024 (IIST)

PH622: Adaptive Optics (M.Tech/DD B.Tech, Opt. Eng.)
PH642: Adaptive Optics Lab (M.Tech/DD B.Tech, Optical Eng.)
PH241: Optics Lab II (DD B.Tech, Opt. Eng., shared)

July 2023 – Nov 2023 (IIST)

PH411: Optical Engineering Fundamentals (M.Tech/DD B.Tech, Opt. Eng, shared)
PH637: Electromagnetism and Optics (M.Tech/DD B.Tech, Quantum Tech. shared)
PH231: Optics Lab I (DD B.Tech, Opt. Eng., shared)

Sept 2020 – May 2023 (Kellogg College, University of Oxford)

College Advisor
Provided Academic/Pastoral Guidance to 11 M.Sc. students and 1 DPhil Student

Biswajit Pathak

Research interests

Profile and Work Experience

Academic Background

Work Experience

Research Experience

Courses Offered

Event Details