Fig. 1. Schematics of accurately measuring 543 nm frequency stabilized He-Ne laser wavelength by optical frequency comb. (a) Offset locking unit; (b) SHG 543 nm laser unit; (c) detection and counting unit for beat signals of frequency doubling 543 nm laser and measured thermally stable He-Ne laser

Fig. 2. Experimental setup for measuring 543 nm frequency stabilized He-Ne laser wavelength by optical frequency comb

Fig. 3. Fluctuations of repetition rate and carrier phase shift frequency of optical frequency comb. (a) Repetition rate; (b) carrier phase shift frequency

Fig. 4. Beat note signals of DFB single frequency fiber laser and optical frequency comb before and after filtering

Fig. 5. Frequency fluctuations of 1086 nm DFB single frequency fiber laser before and after loop locking

Fig. 6. Beat note signals of SHG 543 nm laser and thermal frequency stabilized He-Ne laser under test

Fig. 7. Beat note frequency fluctuation of SHG 543 nm laser and thermal frequency stabilized He-Ne laser under test after loop locking

Fig. 8. Frequency stabilities of DFB fiber laser and 543 nm He-Ne laser after loop locking

Fig. 9. Reproducibility of system for accurately measuring 543 nm He-Ne laser wavelength by optical frequency comb