TY - JOUR AU - Paul Williams AU - Jonathan Kofler C2 - Journal of Lightwave Technology DA - 2004-02-01 LA - en M1 - 22 PB - Journal of Lightwave Technology PY - 2004 TI - Narrow-band measurement of differential group delay by a six-state RF phase-shift technique: 40 fs single-measurement uncertainty UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31437 ER -