Pattern formation in transparent media using ultrashort laser pulses

J. Thomas, R. Bernard, K. Alti, A. K. Dharmadhikari, J. A. Dharmadhikari, A. Bhatnagar, C. Santhosh, D. Mathur

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We report results of a systematic study of the morphology of laser-written structures within transparent media like fused silica, borosilicate glass (BK7), and polymethylmethylacrylate (PMMA) using a high-energy, 5.1 MHz repetition rate, femtosecond laser oscillator. Depending on experimental conditions, both smooth channels as well as dot patterns can be laser-written. The periodicity of the written dots is readily controlled by the energy dose, a single parameter that encompasses laser energy, translation speed at fixed repetition rate, and focusing conditions. We discover the importance of the direction in which laser-writing is carried out: the periodicity of the dot patterns written at fixed energy dose but with opposite writing directions is significantly different. In PMMA, extremely large rod-like structures (∼200 μm) are observed whose formation is also dependent on writing direction. We quantify guidance of 632 nm and 830 nm light in structures written in BK7.

Original languageEnglish
Pages (from-to)29-38
Number of pages10
JournalOptics Communications
Volume304
Issue number1
DOIs
Publication statusPublished - 28-05-2013

Fingerprint

Ultrashort pulses
Lasers
pulses
lasers
periodic variations
repetition
Borosilicate glass
Fused silica
dosage
energy
borosilicate glass
rods
oscillators
silicon dioxide
Direction compound

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Thomas, J., Bernard, R., Alti, K., Dharmadhikari, A. K., Dharmadhikari, J. A., Bhatnagar, A., ... Mathur, D. (2013). Pattern formation in transparent media using ultrashort laser pulses. Optics Communications, 304(1), 29-38. https://doi.org/10.1016/j.optcom.2013.04.044
Thomas, J. ; Bernard, R. ; Alti, K. ; Dharmadhikari, A. K. ; Dharmadhikari, J. A. ; Bhatnagar, A. ; Santhosh, C. ; Mathur, D. / Pattern formation in transparent media using ultrashort laser pulses. In: Optics Communications. 2013 ; Vol. 304, No. 1. pp. 29-38.
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Thomas, J, Bernard, R, Alti, K, Dharmadhikari, AK, Dharmadhikari, JA, Bhatnagar, A, Santhosh, C & Mathur, D 2013, 'Pattern formation in transparent media using ultrashort laser pulses', Optics Communications, vol. 304, no. 1, pp. 29-38. https://doi.org/10.1016/j.optcom.2013.04.044

Pattern formation in transparent media using ultrashort laser pulses. / Thomas, J.; Bernard, R.; Alti, K.; Dharmadhikari, A. K.; Dharmadhikari, J. A.; Bhatnagar, A.; Santhosh, C.; Mathur, D.

In: Optics Communications, Vol. 304, No. 1, 28.05.2013, p. 29-38.

Research output: Contribution to journalArticle

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Thomas J, Bernard R, Alti K, Dharmadhikari AK, Dharmadhikari JA, Bhatnagar A et al. Pattern formation in transparent media using ultrashort laser pulses. Optics Communications. 2013 May 28;304(1):29-38. https://doi.org/10.1016/j.optcom.2013.04.044