All-fiber-coupled two-colour laser system for mid-infrared generation

用于产生中红外的全光纤耦合双色激光系统

• 批准号: 491222-2015
• 负责人: Strickland, Donna
• 金额: $ 1.82万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586809
• 关键词: fiber; coupled; two; colour; laser

O/E Land is looking to expand their mid-infrared fiber product line to cover the full "fingerprint region" of 2 to 25µm for molecular spectroscopy. The mid-infrared is becoming increasingly important for security applications. We are proposing to design a compact, short pulse, completely fiber-coupled, two-colour laser for long wavelength mid-infrared generation. A completely fiber coupled system would be a stable, efficient and compact source of short-pulse mid-infrared that could be used in sensing and spectroscopy applications. Currently there are no short-pulse, compact, alignment-free laser systems covering this spectral region. The all-fiber-coupled system would be based on the two-colour Yb:fiber amplifier developed at the University of Waterloo. This two-colour amplifier has been used to generate mid-infrared in the long wavelength side of the fingerprint region. The Waterloo system is however not an all-fiber system and is in fact a large system currently covering a 4 by 8 square foot optical bench. We are proposing that the first stage of this amplifier system be replaced with a much simpler, more compact and alignment free system comprised of: a chirped fiber Bragg grating (CFBG) and a fiber-coupled semiconductor-optical-amplifier (SOA). Both devices would be directly fiber coupled to the broadband continuum laser source and thereby eliminate the current alignment issues offering greater ease of use, greater power stability, higher coupling efficiency and a much smaller footprint.

O/E Land正在寻求扩大其中红外光纤产品线，以覆盖2至25µm的分子光谱的完整“指纹区域”。中红外对于安全应用变得越来越重要。我们提出设计一个紧凑，短脉冲，完全光纤耦合，双色激光器的长波长中红外产生。完全光纤耦合系统将是一种稳定、高效和紧凑的短脉冲中红外光源，可用于传感和光谱应用。目前还没有短脉冲、紧凑、无干扰的激光系统覆盖这一光谱区域。全光纤耦合系统将基于滑铁卢大学开发的双色Yb：光纤放大器。这种双色放大器已被用来产生中红外线的长波长一侧的指纹区域。然而，滑铁卢系统不是全光纤系统，实际上是目前覆盖4 × 8平方英尺光具座的大型系统。我们建议，该放大器系统的第一级被替换为一个更简单，更紧凑和对准自由的系统，包括：啁啾光纤布拉格光栅（CFBG）和光纤耦合半导体光放大器（SOA）。这两种器件都将直接光纤耦合到宽带连续激光源，从而消除了电流对准问题，提供了更大的易用性、更大的功率稳定性、更高的耦合效率和更小的占地面积。