Determination of Nonlinear Refractive Index of Zinc Phthalocyanine by Pump Induced Fizeau Interferometry

Anil Kumar; M. P. Singh; Devendra Mohan; A. K. Gupta

doi:10.14429/dsj.69.12026

Anil Kumar DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India
M. P. Singh DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India
Devendra Mohan Department of Physics, Guru Jambheshwar University of Science & Technology, Hisar - 125 001, India
A. K. Gupta DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India

DOI: https://doi.org/10.14429/dsj.69.12026

Keywords: Fizeau Interferometer, Thermo-optic Coefficient, Light Induced Refractive Index

Abstract

Experimental measurement of intense light induced refractive index is demonstrated using Fizeau interferometer. Refractive index is induced in a specific region of the sample with intense light pulse of a linearly polarized, Q- switched Nd:YAG laser at 1064nm wavelength. The respective change in optical path difference (OPD) is measured using Fizeau interferometer. The OPD so obtained is mapped in terms of change in refractive index in the area of interaction of pump beam and sample. The measured induced refractive index is then used to calculate thermo-optic coefficient of the ZnPc embedded polymeric sample.

Author Biographies

Anil Kumar, DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India

Dr Anil Kumar received his PhD (Physics) from GJuS&T Hisar, India. He is currently involved in thin film coating technologies at DRDO-Instruments Research & Development establishment, Dehradun. His research interest includes nonlinear optical characterisation of nonlinear materials and thin film fabrication and characterisation.
In the current study, he prepares the framework for the study, result analysis and manuscript writing.

M. P. Singh, DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India

Mr M.P. Singh received his MTech (Applied optics) from IIT Delhi and presently working as a scientist at DRDO- Instruments Research & Development establishment, Dehradun. His current area of interest is metrology of aspheric optics and image processing.
He has contributed in conducting experimental work for the study.

Devendra Mohan, Department of Physics, Guru Jambheshwar University of Science & Technology, Hisar - 125 001, India

Dr Devendra Mohan, is serving as a Professor of Physics at GJuS&T university, Hisar. His research interest includes nonlinear optics, material sciences and optical sensors.
He contributed in formulising the concept and prepared the sample for the study.

A. K. Gupta, DRDO-Instruments Research and Development Establishment, Dehradun - 248 008, India

Dr A.K. gupta, former director, DrDO-Instruments research & Development establishment, Dehradun is a renowned scientist in the field of optics and photonics. He has more than 100 publications to his credit.
He has been associated in reviewing the entire study and has edited the manuscript.

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