Measurement of the linewidth of a continuous-wave laser with a cavity-length modulation technique

Jae Wan Kim, Jae Won Hahn, Yong Shim Yoo, Jae Yong Lee, Hong Jin Kong, Hai Woong Lee

Research output: Contribution to journalArticle

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We introduce a Fabry–Perot cavity-length modulation technique for measuring the linewidth of a continuous wave (cw) laser. We calculate the peak intensity of a cw laser transmitted through a Fabry– Perot cavity as a function of mirror speed. By fitting the experimental data to the results of the calculation, we determine the linewidth of a frequency-stabilized cw laser. The linewidth of a cw ring dye laser measured in the 570–590-nm wavelength range is -170 ± 20 kHz. We also demonstrate the use of this technique to measure the reflectivity of a high-reflectance mirror.

Original languageEnglish
Pages (from-to)1742-1745
Number of pages4
JournalApplied Optics
Issue number9
Publication statusPublished - 1999 Mar 20


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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