TY - RPRT TI - Tunable Filter Made From Three Coupled WGM Resonators AU - Savchenkov, Anatoliy AU - Iltchenko, Vladimir AU - Maleki, Lute AU - Matsko, Andrey PY - 2006 UR - https://ntrs.nasa.gov/citations/20100021332 ID - 20100021332 ER -