TY - JOUR AU - Leibrandt, David AU - Thorpe, M AU - Chou, Chin-Wen AU - Fortier, Tara AU - Diddams, Scott AU - Rosenband, Till C2 - Physical Review Letters DA - 2013-12-06 LA - en M1 - 111 PB - Physical Review Letters PY - 2013 TI - Absolute and relative stability of an optical frequency reference based on spectral hole burning in Eu3+:Y2SiO5 UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914300 ER -