Patents & Technology Creation

Patents

An All-Solid-State High Power Visible Laser System and Method Thereof K.P. Singh (2023) - Indian
Electron Spin Dependent Fluoroscent Protiens, Systems And Their Method K.P Singh (2020) (Filed) - Indian/U.S.
Silk based Nanobiosensors and Methods of Preparation thereof K. P. Singh, M. S. Sidhu (2018) Continuation in Part of US Patent Application no Pub. No: US 2018 / 0354066.
Nanoprocessing and Heterostructuring of silk with light. K. P. Singh, M. S. Sidhu and B. Kumar (2018) United States Patent: US20180354066A1
Single iLens Interferometer K.P. Singh and Pooja Munjal (2018) - Indian

Technologies

We developed new technologies in the following broad areas and these are available for Transfer of Technology to interested users:

I. Optical Interferometer

II. Ultrafast Instrumentations

III. Sensing & Metrology

IV. High Power Lasers

I. Optical Interferometers

Ultrathin Interferometer

This inline, wavefront-splitting interferometer is based on an ultrathin glass plate and achieves unprecedented delay control and stability at the 2-attosecond level. It readily produces white-light fringes and enables precise measurement of the coherence length of broadband sources.

Ultrathin Picoscale White Light Interferometer

S Dahiya, A Tyagi, A Mandal, T Pfeifer, KP Singh

Scientific Reports (12), 8656, 2022

Liquid Drop Interferometer

This is a unique design in which a sessile drop of water is used as a laser interferometer with self-calibration measurement and sub-1-nanometer sensitivity in real time. It finds multiple applications in radiation pressure of light, viscometers, measurement of evaporation rate, etc.

Universal long-range nanometric bending of water by light,

G. Verma, K. P. Singh,

Physical review letters 115 (14), 143902 (2015)

iLens Interferometer

It is a universal interferometer capable of obtaining interference fringes from any surface, including paper, plastic, human skin, cloth etc. It achieves sub-1 nm precision in real time and is suitable to perform measurements on all four states of matter: solid surface, liquid, gas and plasma. A simple yet powerful innovation.

A single-lens universal interferometer: towards a new class of devices

P. Munjal and K. P. Singh,

Applied Physics Letters 115, 111102 (2019).

Twisted iLens

The same interference lens (iLens) obtains spiral fringes from twisted light, i.e., light containing OAM. We demonstrated applications in solid surface measurement and characterization of twisted state of light.

Noise self-canceling picoscale twisted interferometer

P Munjal, K Chaudhary, KP Singh

Optics Letters 47 (22), 5993-5996

II. Ultrafast Instrumentation

Attosecond Beam Line

We have developed an XUV HHG beam line over the past many years. The attosecond beam line is routinely generating attosecond pulses, seeded by intense fs pulses (800nm, 25fs and 1-2 mJ). This complex yet advanced setup is being used to probe electron dynamics of matter on an attosecond time scale. This technology was awarded the Nobel Prize in Physics 2024.

Attosecond stable dispersion-free delay line for easy ultrafast metrology

A Tyagi, MS Sidhu, A Mandal, S Kapoor, S Dahiya, JM Rost, T Pfeifer,

Scientific Reports 12 (1), 1-7

All-reflective ultrafast Interferometer

It employs a pair of knife-edge reflective prisms to achieve wavefront division and recombination with attosecond-scale delay control, free from dispersion. This configuration enables precise characterization of intense femtosecond pulses and also functions as an attosecond delay line in high-harmonic generation (HHG) setups.

Attosecond stable dispersion-free delay line for easy ultrafast metrology

A Tyagi, MS Sidhu, A Mandal, S Kapoor, S Dahiya, JM Rost, T Pfeifer,

Scientific Reports 12 (1), 1-7

Femtometer for few-cycle Pulses

We have developed an ultrathin Femtometer capable of measuring ultrahsort pulses of 25 fs mJ pulse-energy as well 10fs nJ pulse-energy using simple mobile camera and home-made software.

Ultrathin femtometer for few-cycle pulses

Pooja chugh, Sunil Dahiya, Akansha Tyagi, Thomas Pfeifer, Thierry Ruchon and Kamal P. Singh

Accepted in Applied Optics (2025)

Ultrathin Delay line

This innovative ultrafast delay line achieves 1-as delay stability and resolution and is easy to build, calibrate, and operate. Its capabilities are shown with measurements of IR-IR control of HHG in the gas phase. Many other experiments and ultrafast applications are currently being carried out.

In-line ultra-thin attosecond delay line with direct absolute-zero delay reference and high stability

S. Dahiya, M. S. Sidhu, A. Tyagi, A. Mandal, B. Nandy, J. M. Rost, T. Pfeifer, and K. P. Singh

Optics Letters 45, 5266-5269 (2020).

III. Sensing & Metrology

Nano-Newton Tensile Tester

We converted the electromagnetic load cell of a precision weighing balance into a precision nano-tensile tester with 1nNewton resolution. This device finds applications in characterization of the strength and toughness of silk polymers and biomaterials. The same sensitivity is achieved in high vacuum conditions.

Time-resolved nano-Newton force spectroscopy with a micro-balance,

B. Panda, Sidhu M. S., Munjal P., Sokhi S., and K. P. Singh,

Review Sci. Instrumentation, 90 (4), (2019)

Zepto-Nm Silk Sensor

This device is a torsion pendulum sensitive to a few 100 zepto-Nm and operating in high vacuum and well calibrated with radiation pressure of light. It will find applications in precision metrology in physics and technology.

All Optical Zepto-Newton-Meter Nanoscale Silk Sensor

Shivali Sokhi and Kamal P. Singh

Phys. Rev. Lett. 133, 083801

IV. High Power Lasers

100 W Blue Laser

We have developed all-solid-state air-cooled 100 W blue laser. This laser system combined innovative cooling technology and laser head design to achieve unprecedented performance in a compact setup. This laser finds applications in welding of battery packs, transformation of materials, production of biofuel from abundant biomass etc.

Development of an all-solid-state air-cooled high-power blue diode laser for metal processing.

Jayant S Devara, S Jakhar, Y Sihag, B Panda, A Venkatesan, KP Singh

Optics Letters 49 (1), 17-20 (2023).

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