Analysis of FDML lasers with meter range coherence
Analysis of FDML lasers with meter range coherence
复制标题
DOI：
10.1117/12.2254792
复制
发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
T. Pfeiffer;W. Draxinger;W. Wieser;T. Klein;Markus Petermann;R. Huber
中科院分区：
文献类型：
--
作者：
T. Pfeiffer;W. Draxinger;W. Wieser;T. Klein;Markus Petermann;R. Huber
FDML激光器在宽光学带宽下提供MHz范围内的扫描速率，使其成为高速OCT的理想光源。最近，在较低速度下，已使用可调谐垂直腔面发射激光器（VCSEL）和游标可调谐激光器证明了超长范围扫描源OCT。这些源提供相对高的扫描速率和米范围相干长度。为了实现类似的相干性，我们开发了一个非常好的色散补偿傅里叶域锁模（FDML）激光器，在3.2 MHz的扫描速率和120 nm的光谱带宽。我们证明，这种激光器提供米范围内的相干性，使体积长距离OCT的移动物体。
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 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.