Phosphorus-doped fiber for flat octave spanning supercontinuum generation

Author:

Zhang YangORCID,Xu JiangmingORCID,Liang Junrui,Ke Yanzhao,Ma XiaoyaORCID,He JunhongORCID,Ye Jun1ORCID,Pan Zhiyong1,Leng Jinyong1,Zhou Pu

Affiliation:

1. National University of Defense Technology

Abstract

In a fiber supercontinuum (SC) source, the Raman scattering effect plays a significant role in extending the spectrum into a longer wavelength. Here, by using a phosphorus-doped fiber with a broad Raman gain spectrum as the nonlinear medium, we demonstrate flat SC generation spanning from 850 to 2150 nm. Within the wavelength range of 1.1–2.0 µm, the spectral power density fluctuation is less than 7 dB. Compared to a similar SC source based on a germanium-doped fiber with narrower Raman gain spectrum, the wavelength span is 300 nm broader, and the spectral power density fluctuation is 5 dB lower. This work demonstrates the phosphorus-doped fiber’s great advantage in spectrally flat SC generation, which is of great significance in many applications such as optical coherence tomography, absorption spectroscopy, and telecommunication.

Funder

National Postdoctoral Program for Innovative Talents

National Natural Science Foundation of China

Publisher

Optica Publishing Group

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