Opt Lett. 2020 Oct 1;45(19):5327-5330. doi: 10.1364/OL.397715.
We report on an akinetic actively-mode-locked wavelength-swept laser (ASL) with a sweep that is highly linear in wavenumber. By tailoring the drive waveform of the intracavity modulator, the wavenumber sweep was further linearized to enable high fidelity frequency-domain interferometric ranging without resampling of the acquired data. Used for catheter-based optical coherence tomography, the ASL showed comparable imaging performance to a state-of-the-art polygon-based wavelength-swept source at a matching sweep rate of 103.6 kHz, a duty cycle of 95%, and a bandwidth of 100 nm, centered at 1330 nm.
我们报告了一种无运动主动锁模波长扫描激光(ASL),其在波数上具有高度线性的扫描。通过调整腔内调制器的驱动波形,进一步实现了波数扫描的线性化,从而能够在不对采集数据进行重采样的情况下实现高保真频域干涉测距。在基于导管的光相干断层扫描中,ASL 在匹配的 103.6 kHz 扫描速率、95%的占空比和 1330nm 中心、100nm 带宽下,表现出与最先进的基于多边形的波长扫描源相当的成像性能。