The professor led the “Crystal Color” scientific research team and invented an original scientific idea and technical solution. Using a mid-infrared broadband femtosecond pulsed laser to pump a monolithic chirped structure of lithium niobate nonlinear superlattice photonic crystal — white light laser pointer crystal, can produce high-performance white light laser. White laser crystal materials have the characteristics of multiple ultra-wideband reciprocal vector distribution, which can realize the problem of multi-band ultra-wideband quasi-phase matching. Using the interaction of a single quasi-phase-matched nonlinear crystal and a mid-infrared ultra-wideband femtosecond pulse laser, the simultaneous generation of second to eighth harmonics in a single crystal is achieved, which in turn produces a super-continuum coherent white light laser.
Its wavelength covers the ultraviolet, visible and near infrared bands, and its energy conversion efficiency exceeds 18%. The white laser crystal is completely the world’s first metamaterial crystal. Its appearance has changed the limitation of crystals that can only convert a single frequency or a limited number of frequencies in the past. The revolutionary new material, the invention of the white light laser, filled the gap of nonlinear optics and laser technology. The invention and research results of the white light laser are published in the international authoritative journal of optics and physics.
Since the scientific and technological achievements of non-linear crystals that can produce white lasers have just been converted into industrial products, the crystal color team is still in its infancy, and funds and talents have troubled and prevented the rapid promotion and application of white lasers; The goal and determination of the R & D team of white color laser generators.
I believe that in the near future, the team will give the global laser community another surprise. The world’s first real white laser generator is born, dedicated to the world’s perfect new green laser pointer light source-white laser! The shape of the output beam of a high-quality white light crystal sample maintains the shape of the pump light, which is a circular Gaussian beam. The color photo of the beam is ideal for white light. After the white light beam is split by the grating, a bright color band is formed, from red to orange, yellow, green, cyan, blue and purple in order from right to left. It is clear that the laser output from the optical laser crystal is a high-performance, fully coherent super-continuum white laser. In addition, the beam retains the excellent temporal and spatial coherence of the pump laser beam.