研究目的
Investigating the controllable continuous-wave dual-wavelength laser operation of a Nd:GdVO4/Nd:YVO4 composite crystal using in-band diode pumping around 912 nm.
研究成果
The study successfully demonstrated controllable continuous-wave dual-wavelength laser operation using a Nd:GdVO4/Nd:YVO4 composite crystal with in-band diode pumping. The spectral power ratio of the two wavelengths could be adjusted by varying the pump wavelength via the laser diode's temperature, offering a simpler and more efficient system compared to traditional methods.
研究不足
The study was a proof-of-principle work, and further optimization and scaling of the laser system may be required for practical applications. The exact mechanism behind the small wavelength shift observed in the 1064 nm line was not fully understood.
1：Experimental Design and Method Selection:
The experiment involved the use of a diffusion-bonded Nd:GdVO4/Nd:YVO4 composite crystal as the gain medium, pumped by a fiber-coupled laser diode operating in the 910–915 nm range. The spectral power ratio of the two laser wavelengths was controlled by adjusting the pump wavelength via the laser diode's temperature.
2：Sample Selection and Data Sources:
The gain medium was a 5-mm long 2 at. % doped a-cut Nd:YVO4 crystal diffusion bonded to a 5-mm long 2 at.% doped a-cut Nd:GdVO4 crystal.
3：List of Experimental Equipment and Materials:
The setup included a fiber-coupled laser diode, a thermoelectric cold plate for cooling the laser diode, a digital temperature controller, and several output couplers.
4：Experimental Procedures and Operational Workflow:
The pump beam was imaged into the center of the crystal with a specific spot size radius. The temperature of the laser diode was varied to adjust the pump wavelength, and the output power and spectral characteristics of the laser were measured.
5：Data Analysis Methods:
The output power and spectral characteristics were analyzed to determine the efficiency and tunability of the dual-wavelength laser operation.
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