Combined-SLED source for UHR-OCT and SLO integrated in 14-pin butterfly module

S. Gloor; J. Ojeda; J. Dahdah; N. Primerov; M. Duelk; C. Velez

doi:10.1117/12.2549082

21 February 2020 Combined-SLED source for UHR-OCT and SLO integrated in 14-pin butterfly module

S. Gloor, J. Ojeda, J. Dahdah, N. Primerov, M. Duelk, C. Velez

Proceedings Volume 11228, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIV; 112282N (2020) https://doi.org/10.1117/12.2549082
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

We demonstrate a novel light source for multi-modality imaging where three superluminescent diodes (SLEDs) are integrated on a free-space, temperature-stabilized, micro-optical bench in a standard 14-pin butterfly package. The light output of the three SLED chips is collimated by individual micro-optical collimation lenses and then spectrally and spatially combined in free space through dielectric edge filters before being coupled into a common HI-780 single-mode output fiber. The two SLEDs at 840 nm and 880 nm deliver a combined broadband spectrum with 120 nm bandwidth and 8.5 mW of output power for ultra-high-resolution optical coherence tomography (OCT) imaging with an axial resolution of ~4 microns in air. The third SLED at 750 nm is suitable for implementing eye tracking based on a scanning laser ophthalmoscope (SLO). Because of the free-space architecture, the polarization of all SLEDs is intrinsically aligned such that the UHR-OCT broadband source has a high PER of 20 dB across the entire spectrum.

Citation Download Citation

S. Gloor, J. Ojeda, J. Dahdah, N. Primerov, M. Duelk, and C. Velez "Combined-SLED source for UHR-OCT and SLO integrated in 14-pin butterfly module", Proc. SPIE 11228, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIV, 112282N (21 February 2020); https://doi.org/10.1117/12.2549082

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