A theoretical overview of photon-phonon cooperative pump lasers

    The research team has long been engaged in the research of laser and nonlinear optical materials. In recent years, it has gained an in-depth understanding of the thermal relaxation process from the perspective of solid state physics. Based on the basic idea that the microscopic manifestation of heat (temperature) is phonons, it is believed that thermal relaxation itself is a quantum process of electron-phonon coupling. This process can achieve quantum tailoring of electronic energy levels through appropriate laser design, and obtain new The electronic transition channel generates new wavelength laser. Based on this thinking, a new principle of laser generation by electron-phonon cooperative pumping was proposed. Using Nd:YVO4, a basic laser crystal, as a representative research object, the transition rules of electrons under electron-phonon coupling were deduced. At the same time, An uncooled photon-phonon cooperative pump laser was constructed, and lasers with scarce wavelengths of 1168nm and 1176nm were designed using traditional laser diode pumping technology. On this basis, starting from the basic principles of laser generation and electron-phonon coupling, it was discovered that the product of the laser generation threshold and temperature is a constant, which is the same as the expression form of Curie's law in magnetism, and also demonstrates Basic physical laws in the disorder-to-order phase transition process.

Experimental realization of photon-phonon cooperative pump laser