CN-121748916-B - Dual-wavelength microsphere laser based on three rare earth ions and preparation method thereof

CN121748916BCN 121748916 BCN121748916 BCN 121748916BCN-121748916-B

Abstract

The invention discloses a dual-wavelength microsphere laser based on three rare earth ions and a preparation method thereof, wherein the dual-wavelength microsphere laser based on three rare earth ions comprises a quartz optical fiber, a pumping light source, an erbium-holmium-ytterbium three-doped tellurate glass microsphere, a pumping light source and an erbium-holmium-ytterbium three-doped tellurate glass microsphere, wherein the middle part of the quartz optical fiber is provided with a cone region, the pumping light source is arranged at one end of the quartz optical fiber, the pumping light emitted by the pumping light source is guided to the cone region through a single-mode optical fiber to be optically coupled with the erbium-holmium-ytterbium three-doped tellurate glass microsphere, the erbium-holmium-ytterbium three-doped tellurate glass microsphere uses infrared-transparent tellurate glass as a matrix, and the doping amount of erbium elements is 0.11%, the doping amount of holmium elements is 0.22% and the doping amount of ytterbium elements is 0.80% according to mass percentage. The dual-wavelength microsphere laser based on the three rare earth ions realizes high-efficiency and stable dual-wavelength laser output.

Inventors

BAI SHENGCHUANG
CHEN HAIYU
YU ZHOUYI
WANG XIANGE
WEI ZHIJIAN
JIAO KAI
WANG XUNSI
WANG RONGPING

Assignees

宁波大学
浙江万里学院

Dates

Publication Date: 20260508
Application Date: 20260226

Claims (10)

1. A dual-wavelength microsphere laser based on three rare earth ions is characterized by comprising, The quartz optical fiber (2), the middle part of the quartz optical fiber (2) is provided with a cone region (3); the pumping light source is arranged at one end of the quartz optical fiber (2); Erbium-holmium-ytterbium-doped tellurate glass microspheres (4) are arranged in a cone region (3) of the quartz optical fiber (2); the pump light emitted by the pump light source is guided to the cone region (3) through the quartz optical fiber (2) and is optically coupled with the erbium-holmium-ytterbium-doped tellurate glass microsphere (4); in the erbium-holmium-ytterbium-triple tellurate glass microsphere (4), infrared-transmitting tellurate glass is used as a matrix, the doping amount of erbium element is 0.11%, the doping amount of holmium element is 0.22% and the doping amount of ytterbium element is 0.80% according to mass percentage.
2. The dual wavelength microsphere laser based on triple rare earth ions according to claim 1, characterized in that the ratio of the diameter of the cone region (3) to the diameter of the erbium holmium ytterbium triple tellurate glass microsphere (4) is (1-2): 49.
3. The dual wavelength microsphere laser based on tri-doped rare earth ions according to claim 1, wherein the erbium-holmium-ytterbium tri-doped tellurate glass microsphere (4) is prepared by the following preparation method: S1, respectively weighing raw materials of holmium and ytterbium co-doped tellurate glass and erbium and ytterbium co-doped tellurate glass, and respectively preparing the holmium and ytterbium co-doped tellurate glass and the erbium and ytterbium co-doped tellurate glass by a melting method; S2, preparing holmium and ytterbium co-doped tellurate glass and erbium and ytterbium co-doped tellurate glass prepared in the step S1 into holmium and ytterbium co-doped tellurate glass powder and erbium and ytterbium co-doped tellurate glass powder respectively, fully mixing the holmium and ytterbium co-doped tellurate glass powder according to the equal mass ratio, and then carrying out melting and cooling treatment on the mixed powder to prepare the erbium, holmium and ytterbium tri-doped tellurate glass microsphere (4).
4. The dual-wavelength microsphere laser based on the three rare earth ions, which is disclosed by claim 3, is characterized in that the specific operation of the step S1 is that the raw materials of holmium ytterbium co-doped tellurate glass and erbium ytterbium co-doped tellurate glass are respectively weighed, the raw materials of holmium ytterbium co-doped tellurate glass and erbium ytterbium co-doped tellurate glass are respectively melted to obtain holmium ytterbium co-doped tellurate glass liquid and erbium ytterbium co-doped tellurate glass liquid, oxygen is introduced while stirring is continued in the melting process, and the holmium ytterbium co-doped tellurate glass liquid and the erbium co-doped tellurate glass liquid are respectively transferred to an annealing furnace for cooling treatment, so that the holmium ytterbium co-doped tellurate glass and the erbium ytterbium co-doped tellurate glass are obtained.
5. The dual wavelength microsphere laser based on triple rare earth ions according to claim 4, wherein the melting temperature in step S1 is 1080-1100 ℃, the flow rate of the introduced oxygen is 0.5-2L/min, the initial temperature of the annealing furnace is 400-410 ℃ and the duration is 11-12 h.
6. The dual wavelength microsphere laser based on triple rare earth ions according to claim 3, wherein the melting temperature in step S2 is 680-700 ℃, and the cooling treatment is cold water quenching solidification.
7. The dual wavelength microsphere laser based on triple rare earth ions according to claim 1, wherein the pump light source is 976 nm laser diode pump.
8. Dual wavelength microsphere laser based on triple rare earth ions according to claim 1, characterized in that the quartz fiber (2) is selected from one of standard single mode quartz fiber, low loss quartz fiber, bending resistant quartz fiber.
9. The dual wavelength microsphere laser based on triple rare earth ions according to claim 1, characterized in that the quartz fiber (2) is made by the following preparation method: A1, taking a quartz optical fiber (2), arranging FC interfaces at two ends of the quartz optical fiber (2), and removing a coating layer in the middle to obtain a bare optical fiber; A2, placing the bare optical fiber in a V-shaped groove of a quartz optical fiber clamping and fixing platform, and fixing two ends of the bare optical fiber; a3, preheating the central area of the bare optical fiber by oxyhydrogen flame, and tapering the central area under continuous heating of oxyhydrogen flame after the central area is softened and deformed so as to refine the central area into a tapered area (3); And A4, after tapering is finished, placing the U-shaped aluminum block on a precise three-dimensional adjusting platform, adjusting the precise three-dimensional adjusting platform to enable the conical region (3) of the quartz optical fiber (2) to be in contact with the surface of the aluminum block, and then fixing the conical region (3) of the quartz optical fiber (2) on the aluminum block by using salicylic acid heated and melted by hot air as an adhesive.
10. A method of preparing a dual wavelength microsphere laser based on triple rare earth ions according to any one of claims 1 to 9, comprising the steps of: B1, connecting an FC interface of one end of a quartz optical fiber (2) with a cone region (3) to a pumping light source; and B2, placing the erbium-holmium-ytterbium-triple tellurate glass microsphere (4) in a cone region (3) of the quartz optical fiber (2), and coupling pump light generated by a pump light source with the erbium-holmium-ytterbium-triple tellurate glass microsphere (4) through the cone region (3) of the quartz optical fiber (2) to realize dual-wavelength laser emission.

Description

Dual-wavelength microsphere laser based on three rare earth ions and preparation method thereof Technical Field The invention relates to the technical field of laser preparation, in particular to a dual-wavelength microsphere laser based on three rare earth ions and a preparation method thereof. Background With the rapid development of integrated photonics, the increase of the demand of wavelength division multiplexing technology and the driving of the expansion of polychromatic spectroscopy application, the laser source technology in micro-optical resonators is undergoing an important evolution from single wavelength to multi-wavelength emission. In order to meet the demands of increasingly complex multifunctional photonic integrated systems, researchers are working to develop micro-laser devices capable of dual-wavelength, and multiple-wavelength lasing in a single resonant cavity. The current method for realizing dual-wavelength laser emission mainly involves two approaches, wherein the first approach is to utilize multiple transition channels of a single rare earth ion. As Zhao et al (Zhao X, liu M, xu N, WANG S AND WANG P2024J. Lumin. 269. 120545) demonstrate dual wavelength laser emission of a single Ho 3+ doped fluoroaluminate glass microsphere at about 1.2 μm and about 2.0 μm using different transitions of the Ho 3+ ion. Similarly, dual wavelength laser emission of about 0.85 μm and about 1.55 μm was achieved in the single Er 3+ fluorozirconate glass microspheres. While effective, this approach is inherently limited to the specific energy level structure of the individual ions selected. The second approach is to co-dope multiple rare earth ions within a single resonant cavity to achieve a wider and more flexible combination of emission wavelengths through a designed energy transfer network, which can provide greater versatility. For example, liu et al (Liu J, xu J, guo X, liao T and Huang Y2020 Proc. SPIE 11567 952) demonstrated this potential in Er 3+/Yb3+/TM3+ co-doped tellurate glass microspheres, where multiple characteristic fluorescence peaks over the visible spectrum were generated under optical pumping. This work highlights the ability of the multi-ion system to produce different emissions. However, this presents a greater challenge to achieving laser emission in such complex systems, which requires efficient population inversion rather than just fluorescence. The complex energy transfer and cross-relaxation processes can severely reduce the metastable state required by the laser, which challenge is further amplified when targeting mid-infrared transitions, which are very sensitive to non-radiative losses, thus placing more stringent demands on the matrix glass. Among the numerous matrix material choices, the properties of the glass matrix are critical to achieving an efficient and stable dual wavelength laser. The ideal host material needs to have low phonon energy to promote quantum efficiency of luminescent ions, possess a wide range of infrared light transmission window to support multiband laser emission, and exhibit excellent chemical and physical stability to ensure reliability and lifetime of the device. In recent years, tellurate glass is a very promising material by virtue of the unique material natural disposition, and the tellurate glass is skillfully fused with the low phonon energy characteristic (about 750cm -1) of fluoride glass and the excellent chemical stability and wide infrared transparent interval of tellurite glass, so that an ideal platform is constructed for activating rare earth ions and realizing high-efficiency mid-infrared luminescence. Despite its remarkable material advantages, the potential of tellurate glass as an active medium in supporting dual-wavelength whispering gallery mode microcavity lasers has not been fully exploited and verified, and there is still a gap to be bridged between its excellent material properties and the application of functional photonic devices. Disclosure of Invention The invention aims to solve the technical problem that the existing laser is difficult to realize high-efficiency and stable dual-wavelength laser emission, and provides a dual-wavelength microsphere laser based on three rare earth ions and a preparation method thereof in order to overcome the defects of the prior art. A first aspect of the present invention provides a dual wavelength microsphere laser based on tri-doped rare earth ions comprising, The middle part of the quartz optical fiber is provided with a cone region; The pumping light source is arranged at one end of the quartz optical fiber; Erbium-holmium-ytterbium-triple tellurate glass microspheres are arranged in the cone region of the quartz optical fiber; the pumping light emitted by the pumping light source is guided to the cone region through the quartz optical fiber and is optically coupled with the erbium-holmium-ytterbium-triple tellurate glass microsphere; In the erbium-holmium-ytterbium-codoped tel