TY - GEN
T1 - Superposition of two independent FDML lasers
AU - Grill, Christin
AU - Lotz, Simon
AU - Blomker, Torben
AU - Schmidt, Mark
AU - Draxinger, Wolfgang
AU - Kolb, Jan Philip
AU - Jirauschek, Christian
AU - Huber, Robert
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6
Y1 - 2021/6
N2 - Fourier domain mode locking (FDML) is a laser operating regime, which was developed in 2005 [1]. The output of this laser is a train of optical wavelength sweeps, equivalent to extremely chirped pulses with an optical bandwidth of up to 25 THz and frequency tuning rates of >10 19 Hz/s. This laser type was developed for optical coherence tomography [2] , but found recently more and more applications like LiDAR [3] , Raman microscopy [4] or two-photon microscopy [5]. The laser's coherence properties are relevant for a better understanding of the FDML laser itself and its applications. Because of the wide sweep range and high tuning rate, the laser linewidth cannot be measured with an RF spectrometer. Superposition with a narrowband continuous wave laser only yields phase information for small fractions of the sweep [6]. However, beat signal measurements between two independent FDML lasers with equal sweep range and direction can give information about the complete sweep.
AB - Fourier domain mode locking (FDML) is a laser operating regime, which was developed in 2005 [1]. The output of this laser is a train of optical wavelength sweeps, equivalent to extremely chirped pulses with an optical bandwidth of up to 25 THz and frequency tuning rates of >10 19 Hz/s. This laser type was developed for optical coherence tomography [2] , but found recently more and more applications like LiDAR [3] , Raman microscopy [4] or two-photon microscopy [5]. The laser's coherence properties are relevant for a better understanding of the FDML laser itself and its applications. Because of the wide sweep range and high tuning rate, the laser linewidth cannot be measured with an RF spectrometer. Superposition with a narrowband continuous wave laser only yields phase information for small fractions of the sweep [6]. However, beat signal measurements between two independent FDML lasers with equal sweep range and direction can give information about the complete sweep.
U2 - 10.1109/CLEO/Europe-EQEC52157.2021.9542126
DO - 10.1109/CLEO/Europe-EQEC52157.2021.9542126
M3 - Conference contribution
BT - 2021 Conference on Lasers and Electro-Optics & European Quantum Electronics Conference
PB - IEEE
ER -
