A dual resonance sweeping regime in dispersion tuned akinetic swept source at 1550 nm

Rene Riha; Adrian Bradu; Adrian Gh. Podoleanu

doi:10.1117/12.2647253

8 March 2023 A dual resonance sweeping regime in dispersion tuned akinetic swept source at 1550 nm

Rene Riha, Adrian Bradu, Adrian Gh. Podoleanu

Proceedings Volume 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII; 1236708 (2023) https://doi.org/10.1117/12.2647253
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

In this summary, a fully akinetic FDML-like or so-called dual resonance sweeping regime, for swept source optical coherence tomography, SS-OCT, at 1550 nm is demonstrated. Instead of modulating the optical amplifier gain reported in our previous studies, here we employ a fiber intensity modulator as a mode-locking element. A chirped fiber Bragg grating is used to provide sufficient dispersion in the laser cavity. A tuning range of 25 nm is obtained for a sweep frequency of ≈ 900 kHz with a 6 dB drop-off in sensitivity at 2.6 mm optical path difference. Similarities in operation with the FDML concept are presented.

Citation Download Citation

Rene Riha, Adrian Bradu, and Adrian Gh. Podoleanu "A dual resonance sweeping regime in dispersion tuned akinetic swept source at 1550 nm", Proc. SPIE 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, 1236708 (8 March 2023); https://doi.org/10.1117/12.2647253

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KEYWORDS

Modulation frequency

Optical coherence tomography

Optical path differences

Laser frequency

Laser resonators

Mode locking

Fiber Bragg gratings

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