Raman amplification at 2.2 μm in silicon core fibers with prospects for extended mid-infrared source generation

Meng Huang; Shiyu Sun; Than S. Saini; Qiang Fu; Lin Xu; Dong Wu; Haonan Ren; Li Shen; Thomas W. Hawkins; John Ballato; Anna C. Peacock

doi:10.1038/s41377-023-01250-y

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Raman amplification at 2.2 μm in silicon core fibers with prospects for extended mid-infrared source generation

Original Articles

- Raman amplification at 2.2 μm in silicon core fibers with prospects for extended mid-infrared source generation
- Light: Science & Applications Vol. 12, Issue 10, Pages: 2097-2104(2023)
- Affiliations：
  
  1.Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
  2.School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
  3.Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  4.Center for Optical Materials Science and Engineering Technologies and Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA
- Author bio：
  
  Meng Huang (m.huang@soton.ac.uk)
  Shiyu Sun (s.sun@soton.ac.uk)
- Funds：
- DOI：10.1038/s41377-023-01250-y
  CLC：
- Published：31 October 2023，
  
  Published Online：30 August 2023，
  
  Received：07 June 2023，
  
  Revised：30 July 2023，
  
  Accepted：05 August 2023
- Accepted：
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Huang, M. et al. Raman amplification at 2.2 μm in silicon core fibers with prospects for extended mid-infrared source generation. Light: Science & Applications, 12, 2097-2104 (2023).
DOI：

Huang, M. et al. Raman amplification at 2.2 μm in silicon core fibers with prospects for extended mid-infrared source generation. Light: Science & Applications, 12, 2097-2104 (2023). DOI： 10.1038/s41377-023-01250-y.

摘要

Abstract

Raman scattering provides a convenient mechanism to generate or amplify light at wavelengths where gain is not otherwise available. When combined with recent advancements in high-power fiber lasers that operate at wavelengths ~2 μm

great opportunities exist for Raman systems that extend operation further into the mid-infrared regime for applications such as gas sensing

spectroscopy

and biomedical analyses. Here

a thulium-doped fiber laser is used to demonstrate Raman emission and amplification from a highly nonlinear silicon core fiber (SCF) platform at wavelengths beyond 2 μm. The SCF has been tapered to obtain a micrometer-sized core diameter (~1

.6 μm) over a length of 6 cm

with losses as low as 0.2 dB cm

−1

. A maximum on-off peak gain of 30.4 dB was obtained using 10 W of peak pump power at 1.99 μm

with simulations indicating that the gain could be increased to up to ~50 dB by extending the SCF length. Simulations also show that by exploiting the large Raman gain and extended mid-infrared transparency of the SCF

cascaded Raman processes could yield tunable systems with practical output powers across the 2–5 μm range.

关键词

Keywords

references

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