Cascaded Raman fiber lasers with ultrahigh spectral purity

被引:18
作者
Deheri, Rashmita [1 ]
Dash, Sarthak [1 ]
Supradeepa, V. R. [1 ]
Balaswamy, V [1 ]
机构
[1] Indian Inst Sci, Ctr Nano Sci & Engn, Bangalore 560012, Karnataka, India
关键词
HIGH-POWER;
D O I
10.1364/OL.463950
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Random distributed feedback (RDFB) cascaded Raman fiber lasers (CRFLs) are simple, wavelength agile, and enable high-power fiber lasers outside emission bandwidths of rare-earth doped fiber lasers. However, the spectral purity, defined as the percentage of total output power in the desired Stokes wavelength band, and relative intensity noise (RIN) of these systems are limited due to the intensity noise of the pump source used for Raman conversion. RIN gets amplified and transferred to Raman Stokes orders which causes incomplete Raman conversion and hence limits the spectral purity. Here, we demonstrate a low-intensity noise (<-100 dBc/Hz from 9 kHz to 10 GHz) CRFL with a record spectral purity of similar to 99%, tunable over six Stokes orders, using a very low-intensity noise, narrow linewidth Yb-fiber amplifier as a pump source. (C) 2022 Optica Publishing Group
引用
收藏
页码:3499 / 3502
页数:4
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