CRD Laser's dual-lens combination technology has been patented: solving the problem of 9.6µm laser output and opening up a new dimension for mid-infrared applications

In 2021, CRD Laser successfully achieved stable emission of 9.6µm wavelength laser, which is the most difficult for CO2 lasers to output, with its dual-lens combination screening technology. This breakthrough was hailed by industry experts as a "key milestone in the field of mid-infrared lasers". This technology, through the collaborative design of the film system between the laser output mirror and the reflector, constructs an eight-layer optical structure with alternating high and low refractive index materials on a zinc selenide substrate. It is like installing a "wavelength filter" for the laser, precisely selecting the 9.6µm band and suppressing interference from other energy levels, thus solving the spectral competition problem during the P branch transition of CO2 molecules.

The technical value of the 9.6µm laser lies in its unique spectral characteristics: in the field of spectral analysis, this wavelength perfectly matches the vibrational energy levels of carbon-containing molecules, enabling "fingerprint-level" precise identification of CO2 molecules in atmospheric pollutant monitoring. Compared with the traditional 10.6µm laser, the detection sensitivity is increased by 30%. In the laser communication scenario, its wavelength is precisely within the atmospheric window. Combined with the high rate (hundreds of THz carriers) and anti-interference advantages of satellite laser communication, it provides a low-power and highly secure transmission solution for satellite-ground links. An application case from a certain research institution shows that the spectrometer adopting this technology achieves a resolution of 0.01µm in the analysis of polymer components, far exceeding the industry's conventional level.

This innovative technology, which has been granted a national patent (Patent No. : ZL 202120461473.7), fills the domestic gap in the output of special bands for CO2 lasers. While 90% of the world's CO2 lasers are still focused on the standard wavelength of 10.6µm, CRD Laser has increased the electro-optical conversion efficiency to 22% through micro-nano level control in film system design, providing core light sources for high-end fields such as semiconductor lithography and aerospace material inspection. With the market size of mid-infrared lasers in China expected to exceed 12 billion yuan by 2025, this technology is reshaping the technological discourse power of "Chinese lasers" through intellectual property barriers.