Fig. 1. ECS spectra of Nd‍∶‍GdVO₄ and Nd∶YVO₄ crystals. (a) Normalized ECS spectra of Nd∶GdVO₄ and Nd∶YVO₄ crystals; (b) temperature characteristic curves of ECS spectra

Fig. 2. Experimental setup of Y-cavity dual-wavelength laser

Fig. 3. Thermally induced frequency shift phenomenon of dual-wavelength laser. (a) Laser spectrum when ΔT=30 ℃; (b) dual-wavelength versus heat sink temperature; (c) frequency separation versus temperature difference; (d) laser spectrum when ΔT=-50 ℃

Fig. 4. Relationship between pump power compensation and heat sink temperature

Fig. 5. Influence of pump power on frequency difference of dual-wavelength laser. (a) Relationship between pump power and laser wavelength; (b) frequency separation comparison of power-balanced and non-power-balanced states