基于环腔内光学缓存装置的高速扫频激光光源

傅里叶域锁模(FDML)技术可在保持扫频光源各项指标性能优越的前提下,将扫频速度提高至调谐滤波器的设计极限。为进一步提升FDML扫频激光光源的扫频速度,在激光谐振腔内引入光学缓存装置来实现对扫频光的备份。实验中基于环腔内光学缓存装置的扫频光源中心波长为1310nm,扫频范围为95nm,瞬时线宽为0.1nm,扫频速度翻倍提升至202kHz,平均输出光功率为7.5mW。利用光学缓存装置可将传统FDML高速扫频光源的扫频速度翻倍提升,对提升扫频光学相干层析成像(SS-OCT)系统的综合成像性能具有重要意义。

High-Speed Swept Laser Source Based on Optical Buffer Device Within Ring Cavity

Fourier domain mode locking(FDML)technology can improve the scanning speed to achieve the designed limit of a tunable filter while the swept laser source maintains superior performance of the various parameters.To further improve the sweep frequency of the FDML swept laser source,an optical buffer device is introduced into the optical cavity of the laser to back up the swept light.In our experiment,the center wavelength of the swept laser source based on the optical buffer device within the ring cavity is 1310 nm,the sweep frequency range is 95 nm,the instantaneous line width is 0.1 nm,the scanning speed is raised to 202 kHz,and the average output optical power is 7.5 mW.In this paper,the optical buffer device is used to markedly increase the scanning speed of the traditional FDML high-speed swept laser source.It is important to improve the comprehensive imaging performance of swept source optical coherence tomography(SS-OCT)systems.