Planar waveguide laser device based on Raman crystal cleavage chip activated by rare earth ions

Abstract

The invention provides a planar waveguide laser and self-Raman laser device based on a self-Raman laser crystal cleavage chip. The planar waveguide laser device is composed of a core layer, an inner cladding layer and an outer cladding layer. The medium of the core layer is a Raman crystal cleavage chip activated by trivalent rare earth ions and provided with a cleavage feature. The medium of the inner cladding layer is a wafer or a glass sheet with a refractive index lower than that of the medium of the core layer. The medium of the outer cladding layer is a wafer with good thermal conductivity. The self-Raman laser crystal cleavage chip is used as the core layer of the planar waveguide laser device so as to achieve low production cost and low light transmission loss. The planar waveguide laser device uses a planar waveguide structure, is suitable for large-area cooling, and can transmit waste heat generated by the operation of a fundamental-wave laser and a self-Raman laser timely to reduce a thermo-light effect. In addition, the waveguide structure can limit beam divergence and improve the optical power density in the gain medium, thereby achieving low-threshold high-power fundamental-wave laser and self-Raman laser output.

Description

technical field [0001] The invention relates to a class of solid slab waveguide laser device, especially a self-Raman slab waveguide laser device. Background technique [0002] Using the stimulated Raman scattering effect of the crystal, the incident fundamental wave laser can be transformed into a series of Raman laser emissions with intervals of phonon frequency, which effectively expands the existing laser band and obtains some applications in military, medical, display, and remote sensing. , ocean detection and many other coherent light sources with important application value, such as new yellow light, orange light and eye-safe 1.5μm laser. The self-Raman laser made by doping trivalent rare earth active ions into the Raman crystal can make the device more stable and compact due to the combination of the fundamental laser generation and the stimulated Raman scattering effect in the same crystal , Easier to adjust and attract much attention. However, the thermal effect ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to use the smooth crystal plate cleaved from the Raman laser crystal with cleavage characteristics to make a self-Raman slab waveguide laser device, so as to solve the problem that the thermal effect seriously affects the output power of the self-Raman laser during the operation of the self-Raman laser and efficiency issues, to achieve low threshold, high power and high efficiency self-Raman laser output