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.
G
G
Mueller
Q Z
QZ
Shu
R
R
Adhikari
D B
DB
Tanner
D
D
Reitze
D
D
Sigg
N
N
Mavalvala
J
J
Camp