28 April 2000 Very high power broad- and flat-spectrum superluminescent diodes and fiber modules for OCT applications
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Proceedings Volume 3915, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications IV; (2000) https://doi.org/10.1117/12.384171
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States
Abstract
We present recent results on development of superluminescent diodes (SLEDs) at spectral range from 680 nm to 1300 nm, that are able to deliver 10-30 mW singlemode fiber-coupled non-coherent light. It is shown that optimization of SLED structure and facet protection/antireflection coating procedures allows to get very flat spectrum at very high fiber outputs, with very small parasitic Fabry-Perot resonances. It is also shown, that by optimization of SLED structure it is possible to widen output spectrum considerably. At 940 nm band, 70 nm FWHM spectrum is demonstrated with 5 mW SM fiber output. Coherence function of different SLEDs, and impact of residual spectral modulation and minor structure non-regularities on secondary coherence effects are discussed. The results show that SLEDs are capable to deliver same and even higher outputs than fluorescent fiber doped sources. We also discuss some SLED parameters that are important for OCT applications, like optical feedback sensitivity and SLED noise and its subtraction. Finally, some possibilities on SLED power increasing and spectrum broadening are discussed.
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A. T. Semenov, A. T. Semenov, Vladimir R. Shidlovski, Vladimir R. Shidlovski, } "Very high power broad- and flat-spectrum superluminescent diodes and fiber modules for OCT applications", Proc. SPIE 3915, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications IV, (28 April 2000); doi: 10.1117/12.384171; https://doi.org/10.1117/12.384171
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