Multiwavelength laser designed for single-frame digital holography.
In this paper, we present a tailored multiwavelength Yb-fiber laser source in the 1.03 μm spectral region for spatially multiplexed digital holographic acquisitions. The wavelengths with bandwidths below 0.1 nm were spectrally separated by approximately 1 nm by employing fiber Bragg gratings for spectral control. As a proof of concept, the shape of a cylindrically shaped object with a diameter of 48 mm was measured. The holographic acquisition was performed in single-shot dual-wavelength mode with a synthetic wavelength of 1.1 mm, and the accuracy was estimated to be 3% of the synthetic wavelength.
Staffan
S
Tjörnhammar
Finn Klemming
FK
Eklöf
Zhangwei
Z
Yu
Davood
D
Khodadad
Emil
E
Hällstig
Mikael
M
Sjödahl
Fredrik
F
Laurell