Broadband coherent anti-stokes raman spectroscopy with a modeless dye laser

Jae Won Hahn, Chul Woung Park, Seung Nam Park

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


We develop a modeless dye laser for broadband coherent anti-Stokes Raman spectroscopy (CARS) and investigate the operational characteristics of the modeless laser. The energy efficiency of the modeless laser is 6%, and the beam divergence is 0.65 mrad. We construct a compact movable CARS system with the modeless laser and a graphite tube furnace to assess the accuracy of the CARS temperature. It is found that the difference between the averaged CARS temperature and the radiation temperature measured with an optical pyrometer is <2% at a temperature range from 1000 to 2400 K. We also measure the averaged CARS temperature drift owing to the variation of the spectral distribution of the modeless laser, which is <1.5% during 5 h of operation.

Original languageEnglish
Pages (from-to)6722-6728
Number of pages7
JournalApplied Optics
Issue number27
Publication statusPublished - 1997 Sept 20

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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