Uncovering remarkable contribution of lasers peak intensity region in holography

Lohit Malik (1) , Alexandre Escarguel (2) , Mayank Kumar (3) , Abhishek Tevatia (4) , Rajpal Singh Sirohi (5)

1 Department of Manufacturing Processes and Automation Engineering, Netaji Subhas University of Technology Delhi, New Delhi – 110 078, India
2 PIIM - Physique des interactions ioniques et moléculaires
3 Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi – 110 016, India
4 Department of Mechanical Engineering, Netaji Subhas University of Technology Delhi, New Delhi – 110 078, India
5 Department of Physics, Alabama A & M University, Huntsville, AL 35811, United States

For the scheme of two colour lasers in interference and holography, we uncover remarkable contribution of focusing region (spread) of the peak intensity of superposing laser beams based on the numerical studies and confirm it by mathematical calculations. The pulses having peak intensity for a wider region create better interference pattern, leading to higher modulation depth. Also, such beams having a stronger intensity gradient enhance the range of frequency detuning (difference), which would ease the experimentation in getting better holograms. A comparison of the results achieved with such beams is done with the most commonly used Gaussian beams for the better understanding of the concept for the advancement in holography.

Keywords: Laser beams; peak intensity region; frequency difference; intensity pattern; modulation depth; holography

Domains: Optics [physics.optics]

Lohit Malik, Alexandre Escarguel, Mayank Kumar, Abhishek Tevatia, Rajpal Singh Sirohi. Uncovering remarkable contribution of lasers peak intensity region in holography. Laser Physics Letters, 2021. ⟨hal-03664036⟩