In vivo OCT imaging based on La-codoped bismuth-based erbium-doped fiber

Abstract

We report a FDML swept laser based on Bi-EDF fiber for the first time. A sweeping bandwidth of 81 nm is achieved. In vivo OCT imaging is presented to justify the feasibility of this work.

Wavelength-Swept Cascaded Raman Fiber Laser around 1300 nm for OCT Imaging

“…The sweeping speed of the wavelengthswept laser is also important to improve the acquisition speed of SS-OCT imaging [5,6]. Since the central wavelength region and spectral tuning range of the wavelength-swept laser are determined by the gain medium in the laser cavity, various gain media such as semiconductor optical amplifiers (SOAs) [1][2][3][4], erbium-doped fiber amplifiers (EDFAs) [7], ytterbium-doped fiber amplifiers (YDFAs) [8], fiber optical parametric amplifiers (FOPAs) [9], and fiber Raman amplifiers (FRAs) [10] have been employed in the last decade. The central wavelength region of an SOA can be selected from various gain windows of 800 nm, 1060 nm, 1310 nm, and 1550 nm.…”

“…However, a broad spectral tuning range of the SOA can only be achieved with multiple SOA chips because the gain bandwidth of the SOA is limited by its material properties [4]. The EDFA and YDFA have indigenous central wavelength regions of 1550 nm and 1060 nm, respectively, along with a limited spectral tuning range around their central wavelengths [7,8]. FOPAs can reportedly provide broad gain windows; however, this requires extraordinarily high pump power of over tens of watts [9].…”