1. Articles from gesa palte

    1-4 of 4
    1. Chromatic polarization effects of swept waveforms in FDML lasers and fiber spools

      Chromatic polarization effects of swept waveforms in FDML lasers and fiber spools

      We present detailed investigations of chromatic polarization effects, caused by fiber spools used in FDML lasers and buffering spools for rapidly wavelength swept lasers. We introduce a novel wavelength swept FDML laser source, specially tailored for polarization sensitive optical coherence tomography (OCT) which switches between two different linear polarization states separated by 45°, i.e. 90° on the Poincaré sphere. The polarization maintaining laser cavity itself generates a stable linear polarization state and uses an external buffering technique in order to provide alternating polarization states for successive wavelength sweeps. The design of the setup is based on a comprehensive analysis ...

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    2. Raman-pumped Fourier-domain mode-locked laser: analysis of operation and application for optical coherence tomography

      We demonstrate a Raman-pumped Fourier-domain mode-locked (FDML) fiber laser and optical coherence tomography imaging with this source. The wavelength sweep range of only 30 nm centered around 1550 nm results in limited axial resolution, hence a nonbiological sample is imaged. An output power of 1.9 ... [Opt. Lett. 33, 2815-2817 (2008)]
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    3. Real time en face Fourier-domain optical coherence tomography with direct hardware frequency demodulation

      We demonstrate en face swept source optical coherence tomography (ss-OCT) without requiring a Fourier transformation step. The electronic optical coherence tomography (OCT) interference signal from a k-space linear Fourier domain mode-locked laser is mixed with an adjustable local oscillator, ... [Opt. Lett. 33, 2556-2558 (2008)]
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    4. K-space linear Fourier domain mode locked laser and applications for optical coherence tomography

      We report on a Fourier Domain Mode Locked (FDML) wavelength swept laser source with a highly linear time-frequency sweep characteristic and demonstrate OCT imaging without k-space resampling prior to Fourier transformation. A detailed theoretical framework is provided and different strategies ... [Opt. Express 16, 8916-8937 (2008)]
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    1-4 of 4
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    1. (4 articles) Ludwig Maximilian University of Munich
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