Scholarlink

<p>This study presents a tunable multi-gas spectroscopic scheme using a dual-comb architecture operating within the near-infrared domain. The dual-comb signal is generated by two gain-switched Fabry–Perot laser diodes at low repetition rates and externally injected by a tunable laser source. A systematic study on the injection wavelength, line spacing and optical span performed over the system, ensures the generation of stable optical frequency combs with a 40&#xa0;GHz bandwidth, and more than 400 lines at a low repetition rate (100&#xa0;MHz). This system covers a wavelength range exceeding 40&#xa0;nm, thereby enabling the characterization of different gases with molecular absorptions within this range. A proof-of-concept demonstration was conducted by analyzing four different gas samples, showing similar results to those provided by HITRAN and the manufacturer with a standard deviation of the residuals of 0.005. The simplicity and tunability of this configuration make it highly replicable, paving the way for commercial applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Multi-gas dual-comb spectroscopy with tunable gain-switched laser diodes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月4日

查看全文
  • L. Monroy,
  • A. Pérez-Serrano,
  • J. M. G. Tijero,
  • I. Esquivias

摘要

This study presents a tunable multi-gas spectroscopic scheme using a dual-comb architecture operating within the near-infrared domain. The dual-comb signal is generated by two gain-switched Fabry–Perot laser diodes at low repetition rates and externally injected by a tunable laser source. A systematic study on the injection wavelength, line spacing and optical span performed over the system, ensures the generation of stable optical frequency combs with a 40 GHz bandwidth, and more than 400 lines at a low repetition rate (100 MHz). This system covers a wavelength range exceeding 40 nm, thereby enabling the characterization of different gases with molecular absorptions within this range. A proof-of-concept demonstration was conducted by analyzing four different gas samples, showing similar results to those provided by HITRAN and the manufacturer with a standard deviation of the residuals of 0.005. The simplicity and tunability of this configuration make it highly replicable, paving the way for commercial applications.