https://ee.iitm.ac.in/optics/ 2026-04-04T08:15:41+0530 https://ee.iitm.ac.in/optics/ https://ee.iitm.ac.in/optics/lib/tpl/starterbootstrap/images/favicon.ico text/html 2019-09-01T10:50:15+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:aaplied_optics&rev=1567315215&do=diff Applied Optics Imaging, Mainipulating, Measuring Our Motto: Leave no photon in peace We work in three broad areas: Diffractive Optics, Optical MEMS and Imaging. Diffractive optics involves the design and fabrication of elements with feature sizes in the order of or smaller than the wavelength of light. We study how light can be manipulated in a myriad of ways using these elements. A large part of our work involves fabrication of these elements on fibre tip. text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:applied_optics&rev=1546408428&do=diff Applied Optics Dr. Shanti Bhattacharya joined the Department of Electrical Engineering in the year 2005. She became part of a young and dynamic Photonics group working on various topics in the field. She and her students work mainly in three areas, viz., design, development and fabrication of novel diffractive optical elements, fiber based interferometry and optical MEMS. The branch of optics include the study of the properties of light on interaction with an 'element' as well as the constructi… text/html 2019-02-28T15:54:31+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:cbc&rev=1551349471&do=diff High power narrow Linewidth Fiber Amplifiers Coherent beam combining (CBC) of multiple fiber lasers is a key strategy to develop high power lasers, beyond the output power limit of a single fiber laser source. An inherent requirement for CBC is that the individual fiber amplifier sources possess narrow linewidth. However, power scaling of such narrow linewidth fiber amplifiers is hampered by the stimulated Brillouin scattering (SBS) process. The threshold for the onset of SBS in the above ampli… text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:communications&rev=1546408428&do=diff Communication Optical communication is the backbone of our internet and mobile phones. Fibre optic networks to transport vast amounts of data using technologies such as WDM. The faculty in the photonics group are engaged in understanding different aspects of these networks. text/html 2019-01-05T17:40:44+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:fibre_amplifiers_and_lasers&rev=1546690244&do=diff Lasers Using Erbium, Ytterbium or Thulium doped fibres as a gain medium, we have demonstrated a variety of CW and pulsed lasers. Further enhancements are also areas of active research. [Mode-locked lasers][Q-switched lasers] [High Power lasers][Mid IR lasers][Pulsed depletion laser] This work is supported by a number of national funding agencies, and is also in collaboration with other national laboratories and industrial partners. text/html 2021-10-28T07:26:27+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:fos&rev=1635386187&do=diff Fiber Optic Sensors Group Our group focusses on the design and implementation of optical sensors to various real-world applications primarily on structural health monitoring. We devise both points as well as distributed sensing solutions. Optical sensors based on fiber Bragg gratings have been developed for applications like monitoring the structural integrity of airplanes, partial discharge detection in power transformers and detecting an onset of instability in combustors etc. In the distribu… text/html 2019-09-01T10:49:23+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:hpfl&rev=1567315163&do=diff Fiber Lasers High power fibre lasersPulsed fibre lasersContinuous wave lasers with applications of 1 um, 1.55 um and 2 um fibre lasers in Material machiningBio-imagingHealthcareDefenseLaser Interferometric Gravity wave Observation (LIGO) Topics of research interest include (but are not limited to) are text/html 2019-06-17T18:16:03+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:iimagingandremotesensing&rev=1560775563&do=diff Inverse Imaging & Microwave Remote Sensing Research in our group is arranged around the following themes which have a good mix of electromagnetics, signal/image processing, numerical linear algebra, and statistics. Inverse Imaging In issues such as breast cancer detection, cancerous tissue have different electrical properties (e.g. dielectric permittivity) as compared to healthy tissue at microwave frequencies. So, if we can acquire an image of the permittivity of breast tissue, we might be … text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:integrated_opto_electronics&rev=1546408428&do=diff Integrated Optoelectronics and MOEMS We have been actively engaged in novel design, fabrication and characterizations of optoelectronic devices/circuits for high speed data communication/processing systems and various sensor applications. The integrated optoelectronics group is equipped with microfabrication facilities and the research activities are focused on silicon photonics (SOI rib waveguide devices) and lithium niobate integrated optics. The Mechanical-Optical-Electronic Micro Systems … text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:list_of_instruments&rev=1546408428&do=diff List of Instruments Fiber splicing machines and accessories: Non-PM splicing machine - FitelPM splicing machine - FujikuraAngle cleaverSplice recoater Optical spectrum analyzer: Agilent (600 nm - 1700 nm)IMON Laser sources: Tunable laser (1530 nm - 1570 nm) text/html 2019-03-11T11:19:51+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:metrology&rev=1552283391&do=diff Metrology Optical instruments form the backbone of a lot of metrology. We have developed instruments and measurement techniques for a wide range of applications: OTDR for telecommunications[Optical Coherence Tomography]Flow cytometers using [opto-fluidics]Fibre Interferometers for height measurements text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:nano-photonics&rev=1546408428&do=diff Nano-photonics The use of sub-micron structures to manipulate the properties of light is fairly commonplace these days. We have a budding effort to pursue [ Plasmonics]Bio-photonicsSilicon nano-photonics[ Diffractive optical element][MEMS] Each of these are under various stages of funding and development, and deserve their own webpages text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:nonlinear_optics&rev=1546408428&do=diff Nonlinear Optics Interactions between electromagnetic waves in nonlinear media will be the basis of our next generation of optical devices and communication networks. With a careful interplay between dispersion and amplification, we enhance the interactions of optical fields in highly nonlinear fibre (HNLF), or in a semiconductor optical amplifier (SOA), to achieve demonstrations of text/html 2019-06-17T17:42:44+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:opticalcomm&rev=1560773564&do=diff Optical Communication and Signal Processing Phase Sensitive Amplfiiers Optical amplifiers are an integral part of any commercial optical communication system. In addition to adding a specific gain, optical amplifiers add a definite noise to the signal that degrades the optical signal-to-noise ratio of the signal after amplification. When advanced modulation formats such as Polarization multiplexed QPSK and 16QAM are used for optical communication, increase in noise - especially a phase nois… text/html 2019-06-17T17:59:26+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:plasmonics&rev=1560774566&do=diff Plasmonics & Metamaterials We design, fabricate and characterize Plasmonic devices (specifically filters) for applications in imaging, bio-sensing and colorimetry. We also design, fabricate and test static and reconfigurable metamaterials for band-pass filtering of THz signals for use in concrete hydration studies and structural sensing. text/html 2021-10-28T07:36:15+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:quantumcomm&rev=1635386775&do=diff Quantum Sensing, Communication and Computing Quantum Communications encompasses some of the latest technological trends in optical communications, specific to the security of our data in transit. We rely on the quantum properties of single photons to transfer information between two parties over point-to-point links, called Quantum Key Distribution. This is now extendable to topics in Quantum Networks, Secret Sharing, and Quantum Repeaters text/html 2019-03-07T09:57:14+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:siliconphotonics&rev=1551932834&do=diff Silicon Photonics Miniature, accurate, and cost-effective functional photonic/optoelectronic devices/circuits are at high demands these days for novel applications in the area of computation, communication, biomedical, space and defense environments. It is also established that the SOI based CMOS technologies can be exploited to integrate both electronic and photonic devices monolithically and/or heterogeneous vertical stacking by the use of optical interposer/interconnects. Thus, completely a … text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:sub-systems&rev=1546408428&do=diff Sub-systems Much of the work we do requires that we build electronics to drive lasers, or detect optical signals. Today, we build most of our sub-systems internally. Most commonly used (electronic sub-systems) are Laser DriverLow noise amplifiers (LNA), transimpedance amplifiers ( text/html 2019-03-06T14:14:38+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:tmlfl&rev=1551861878&do=diff Development of wavelength tunable mode-locked fiber laser in the mid-IR Lasers have been used in the area of healthcare- for diagnostic, therapeutic, and surgical applications since the past two or three decades. The wavelength range of 1950-2100 nm is specifically significant due to large water absorption in these wavelengths; leading to applications in laser-based surgery, lithotripsy, and for nonlinear imaging. In addition, these wavelength ranges find several other applications including f… text/html 2019-01-02T11:23:48+0530 Anonymous (anonymous@undisclosed.example.com) https://ee.iitm.ac.in/optics/doku.php?id=photonics:research:wireless_sensor_networks&rev=1546408428&do=diff Wireless Sensor Networks [CO2 sensing wireless sensor network]- Increasing CO2 concentration in atmosphere is one of the major cause of global warming. increased soil respiration in recent years is considered a major source. Suggested sources for increase in soil respiration are microbes (due to increase in temperature) and plant roots. The need is to come up with a hardware which can do soil and atmospheric CO2 measurement with low power consumption and transmit the data over wireless to a per…