title: Measurement of the linewidth of a continuous-wave laser with a cavity-length modulation technique.
abstract: 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 approximately 170 +/- 20 kHz. We also demonstrate the use of this technique to measure the reflectivity of a high-reflectance mirror.
authors.affiliation: Department of Physics, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong, Taejon 305-701, Korea. jwkim@kriss.re.kr
authors.forename: J W
authors.initials: JW
authors.lastname: Kim
authors.forename: J W
authors.initials: JW
authors.lastname: Hahn
authors.forename: Y S
authors.initials: YS
authors.lastname: Yoo
authors.forename: J Y
authors.initials: JY
authors.lastname: Lee
authors.forename: H J
authors.initials: HJ
authors.lastname: Kong
authors.forename: H W
authors.initials: HW
authors.lastname: Lee