Technology & market validation study for an infrared spectrometer based on multiphoton absorption

技术

• 批准号: 530370-2018
• 负责人: Légaré, François
• 金额: $ 0.88万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=657117
• 关键词: Technology; market; validation; study; infrared

In all laser laboratories, spectral characterization of ultrafast laser is the most elementary measurement since the spectra and its spectral phase defines the temporal profile of the pulses. While the spectral phase can be retrieved through interferometry with reference pulses or various approaches involving nonlinear optical processes, the spectra is measured with a spectrometer. In the spectral range from ultra-violet to the near infrared, silicon based spectrometer are highly efficient to characterize the spectra of laser sources with commercial devices having up to 4096 pixels, enabling measurements with high sensitivity and spectral resolution. Above 1100 nm, commercial spectrometers require the use of detectors made of different materials, such as InGaAs arrays for the spectral range up to 2500 nm. In the case of InGaAs arrays, the number of pixels for commercial devices is limited to 512, providing a lower spectral resolution compared to silicon based spectrometer. In addition, this material is more sensitive to thermal noise thus requiring a cooling unit such as a thermoelectric one to ensure high sensitivity. This translates into much higher costs for commercial InGaAs spectrometers compared to silicon (12k-25k$ vs 2k-5k$ based on options).** For pulsed laser, multiphoton absorption occurs in material such as silicon. Here, we propose to use these processes to develop a technology entitled "Infrared spectrometer based on multiphoton absorption", to enable spectral measurements up to 2200 nm using two-photon absorption in silicon, and 3300 nm with three-photons. We have already validated this technology between 1300 and 2000 nm where the signal from a silicon detector simply scales with the square of the laser intensity, denoting a two-photon absorption. The advantage of this technology is that it enables the spectral characterization of infrared pulsed laser using conventional detectors used for the visible/near-infrared spectral range, thus offering high sensitivity and high spectral resolution, with a price in the range of 6k$ to 8k$. The technology & market validation study will help to confirm the interest of Canadian and foreign companies for the tech transfer and the commercialization of the proposed technology.******

在所有的激光实验室中，超快激光的光谱特性是最基本的测量，因为光谱和光谱相位决定了脉冲的时间轮廓。虽然光谱相位可以通过参考脉冲的干涉测量法或涉及非线性光学过程的各种方法来检索，但光谱是用光谱仪测量的。在从紫外到近红外的光谱范围内，硅基光谱仪可以高效地表征激光源的光谱，商业设备具有高达4096个像素，从而实现高灵敏度和光谱分辨率的测量。在1100 nm以上，商业光谱仪需要使用由不同材料制成的检测器，例如用于高达2500 nm光谱范围的InGaAs阵列。在InGaAs阵列的情况下，商业设备的像素数量被限制为512，与硅基光谱仪相比，提供更低的光谱分辨率。此外，这种材料对热噪声更敏感，因此需要冷却单元，例如热电冷却单元，以确保高灵敏度。这意味着商用InGaAs光谱仪的成本要比硅高得多（12 k-25 k $ vs 2k-5 k $，取决于选项）。 对于脉冲激光，在诸如硅的材料中发生多光子吸收。在这里，我们建议使用这些过程来开发一种名为“基于多光子吸收的红外光谱仪”的技术，以使光谱测量高达2200 nm，使用硅中的双光子吸收，和3300 nm的三光子。我们已经在1300和2000 nm之间验证了这项技术，其中来自硅探测器的信号简单地与激光强度的平方成比例，表示双光子吸收。该技术的优势在于，它能够使用用于可见/近红外光谱范围的常规探测器来进行红外脉冲激光的光谱表征，从而提供高灵敏度和高光谱分辨率，价格在6 k $至8 k $的范围内。技术和市场验证研究将有助于确认加拿大和外国公司对技术转让和拟议技术商业化的兴趣。