Determination and optimization of mode matching into optical cavities by heterodyne detection.
We report on a novel high-sensitivity method to characterize and improve mode matching into optical cavities. This method is based on heterodyne detection of cylindrical transverse cavity modes. A specially designed annular-segmented photodiode is used to measure the amplitude of nonresonant modes reflected by the cavity. Our measurements allow us to optimize cavity mode matching to nearly 99.98% and will play an important diagnostic role in gravitational-wave detectors.
Mueller
G
G
Shu
Q Z
QZ
Adhikari
R
R
Tanner
D B
DB
Reitze
D
D
Sigg
D
D
Mavalvala
N
N
Camp
J
J