Superlum’s 840-nm SOA Used for Retinal Imaging
A research project at the University of Lübeck used the 840-nm Semiconductor Optical Amplifier (SOA) from Superlum for the retinal imaging. The results of this research appear in an article called “828 kHz retinal imaging with an 840 nm Fourier domain mode locked laser.”
The abstract of this article states:
This paper presents a Fourier domain mode locked (FDML) laser centered around 840 nm. It features a bidirectional sweep repetition rate of 828 kHz and a spectral bandwidth of 40 nm. An axial resolution of ∼9.9 µm in water and a 1.4 cm sensitivity roll-off are achieved. Utilizing a complex master-slave (CMS) recalibration method and due to a sufficiently high sensitivity of 84.6 dB, retinal layers of the human eye in-vivo can be resolved during optical coherence tomography (OCT) examination. The developed FDML laser enables acquisition rates of 3D-volumes with a size of 200 × 100 × 256 voxels in under 100 milliseconds. Detailed information on the FDML implementation, its challenging design tasks, and OCT images obtained with the laser are presented in this paper.
About Superlum Diodes
The company develops and manufactures:
- Superluminescent Light Emitting Diode (SLED) modules covering the spectral range of 650–1620 nm
- Low coherent light sources, based on SLED modules with special driving electronics
- Customized versions of the above products
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