The 2-μm to 6-μm mid-infrared supercontinuum generation in cascaded ZBLAN and As2Se3 step-index fibers

• 来源期刊: 中国物理B（英文版）
• 关键词: supercontinuum generation infrared lasers fiber lasers nonlinear
• 年，卷（期）: 2019,（8）
• 页码范围: 179-183
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/8/084209

摘要

Fiber-based mid-infrared (MIR) supercontinuum (SC) sources benefit from their spectral brightness and spatial coherence that are needed for many applications,such as spectroscopy and metrology.In this paper,an SC spanning from 2 μm to 6 μm is demonstrated in cascaded ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) and As2Se3 step-index fibers.The pump source is a ZBLAN fiber-based MIR SC laser with abundant high-peak-power soliton pulses between 3000 nm and 4200 nm.By concatenating the ZBLAN fiber and the As2Se3 fiber,efficient cascading red-shifts are obtained in the normal dispersion region of the As2Se3 fiber.The spectral behavior of cascaded SC generation shows that the long-wavelength proportion of MIR SC generated in the ZBLAN fiber plays a critical role for further spectral extension in the As2Se3 fiber.