Broadband wavelength-swept Cr4+:YAG crystal fiber laser

Author:

Li Yi-Hsun,Lee Yin-Wen1ORCID,Huang Sheng-Lung2ORCID

Affiliation:

1. National Taipei University of Technology

2. National Taiwan University

Abstract

We present a broadband wavelength-swept laser using a 16-µm-core-diameter Cr4+:YAG crystal fiber as the gain medium. The laser-diode-pumped crystal fiber laser has a threshold of only 102 mW due to the low propagation loss and high heat dissipation efficiency. The laser achieves a sweeping wavelength range of 134 nm, centered around 1425 nm, with a scanning speed of 163 k nm/s. Notably, the cross-polarization-coupled excited state absorption of the signal wavelength constrained the long-wavelength lasing limit. This laser has the potential for swept source optical coherence tomography applications, providing an axial resolution of 11.4 µm.

Funder

National Science and Technology Council

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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1. Governing for the Future;Springer Texts in Political Science and International Relations;2024

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