Multibeam-waist modes in an end-pumped Nd:YVO4 laser

Ching Hsu Chen, Po Tse Tai, Wen Feng Hsieh, Ming-Dar Wei

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We studied both numerically and experimentally the transverse modes near degenerate resonator configurations such as g1g2 = 1/4, 1/2, 3/4 in a simple plano-concave Nd:YVO4 laser with a small pump size. We found that there are stationary modes that show an additional beam waist besides the well-known waist on the fiat mirror end near g1g2 = 1/4, 3/4. When the specific modes of the three degeneracies propagate through a lens, they are capable of exhibiting multiple beam waists. The multibeam-waist mode possesses a small waist size without a ring structure in the near field on the flat mirror end; nevertheless, it has a far-field pattern with many concentric rings. The numerical results show good agreement with the experimental observations. Furthermore, by simultaneously considering the wavelike and the raylike character of the multibeam-waist mode, we found that it can be represented as a superposition of N consecutive round-trip electric fields of period-N solution in the degenerate empty cavity, where N = 2 for g1g2 = 1/2 and N = 3 for g1g2 = 1/4, 3/4.

Original languageEnglish
Pages (from-to)1220-1226
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume20
Issue number6
DOIs
Publication statusPublished - 2003 Jan 1

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lasers
mirrors
ring structures
far fields
near fields
resonators
lenses
pumps
cavities
electric fields
rings
configurations

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Chen, Ching Hsu ; Tai, Po Tse ; Hsieh, Wen Feng ; Wei, Ming-Dar. / Multibeam-waist modes in an end-pumped Nd:YVO4 laser. In: Journal of the Optical Society of America B: Optical Physics. 2003 ; Vol. 20, No. 6. pp. 1220-1226.
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Multibeam-waist modes in an end-pumped Nd:YVO4 laser. / Chen, Ching Hsu; Tai, Po Tse; Hsieh, Wen Feng; Wei, Ming-Dar.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 20, No. 6, 01.01.2003, p. 1220-1226.

Research output: Contribution to journalArticle

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