Precise spectroscopy of 167Er:Y2SiO5 based on laser frequency stabilization using a fiber laser comb
Yasui, S.; Hiraishi, M.; Ishizawa, A.; Omi, H.; Kaji, R.; Adachi, S.; Tawara, T.
Optics Express 29(17): 27137-27148
ISSN/ISBN: 1094-4087 PMID: 34615135 Accession: 072347360
Precise spectroscopy of the hyperfine level system of 167Er-doped Y2SiO5 was achieved in the frequency domain. By using an optical frequency comb to stabilize the light source frequency to an accuracy on the order of hertz on a long-term scale, Allan deviation < 10 Hz was achieved for an integration time of 180 s. As a result, spectral hole-burning experiments yielded a more accurate hole spectrum with a narrow homogeneous linewidth. The method opens the way to the straightforward exploration of relaxation mechanisms in the frequency domain by simple steady-state measurements.