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Analysis of FDML lasers with meter range coherence

机译:仪表范围连贯性的FDML激光器分析

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FDML lasers provide sweep rates in the MHz range at wide optical bandwidths, making them ideal sources for high speed OCT. Recently, at lower speed, ultralong-range swept-source OCT has been demonstrated~(1,2) using a tunable vertical cavity surface emitting laser (VCSEL) and also using a Vernier-tunable laser. These sources provide relatively high sweep rates and meter range coherence lengths. In order to achieve similar coherence, we developed an extremely well dispersion compensated Fourier Domain Mode Locked (FDML) laser, running at 3.2 MHz sweep rate and 120 nm spectral bandwidth. We demonstrate that this laser offers meter range coherence and enables volumetric long range OCT of moving objects.
机译:FDML激光器在宽光带宽的MHz范围内提供扫描率,使其成为高速OCT的理想来源。最近,在较低的速度下,使用可调谐垂直腔表面发射激光器(VCSEL)并使用Vernier可调激光器来证明Ultralong-Range扫描源10010〜(1,2)。这些来源提供相对高的扫描速率和仪表范围连贯长度。为了实现类似的相干性,我们开发了一个极良好的色散补偿傅立叶域模式锁定(FDML)激光,以3.2MHz扫描速率和120nm光谱带宽运行。我们证明了该激光提供仪表范围连贯性,并且可以使移动物体的容量长距离。

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