"Chromatic polarization effects of swept
waveforms in FDML lasers and fiber spools"Wolfgang Wieser, Gesa Palte, Christoph M. Eigenwillig, Benjamin R. Biedermann, Tom Pfeiffer, and Robert Huber
Optics Express, Vol. 20, Issue 9, pp. 9819-9832 (2012)
We present detailed investigations of chromatic polarization
effects, caused by fiber spools used in FDML lasers and buffering spools
for rapidly wavelength swept lasers. We introduce a novel wavelength
swept FDML laser source, specially tailored for polarization sensitive
optical coherence tomography (OCT) which switches between two different
linear polarization states separated by 45°, i.e. 90° on the Poincaré sphere.
The polarization maintaining laser cavity itself generates a stable linear
polarization state and uses an external buffering technique in order to
provide alternating polarization states for successive wavelength sweeps.
The design of the setup is based on a comprehensive analysis of the
polarization output from FDML lasers, using a novel 150 MHz polarization
analyzer. We investigate the fiber polarization properties related to swept
source OCT for different fiber delay topologies and analyze the polarization
state of different FDML laser sources.
BMO authors (in alphabetic order):
Optical Coherent Ranging and Optical Coherence Tomography (OCT): Imaging and profilometry with rapidly frequency swept laser sources
Fourier Domain Mode Locking (FDML): Spectral mode locking in optics and applications