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A diode-end-pumped Nd:YAG dual-wavelength laser operating at 1319 and 1338 nm is demonstrated.The maximum average output power of the quasi-continuous wave linearly polarized dual-wavelength laser is obtained to be 2.1 W at a repetition rate of 50 kHz with an output power instability of less than 0.38% and beam quality factor M2 of 1.45.Using the two lines,the highly coherent and narrow linewidth terahertz radiation of 3.23 THz can be generated in an organic 4-N,N-dimethylamino-methyl-stilbazolium tosylate(DAST) crystal.Meanwhile,the multi-wavelength red laser at 659.5,664 and 669 nm is generated by frequency doubling and sum frequency processes in a lithium triborate(LBO) crystal.The average red laser output power is enhanced up to 1.625 W at a repetition rate of 15 kHz with an output power instability of better than 0.53% and beam quality factor M2 of 6.05.Using the three lines,it is possible to generate the multi-wavelength THz radiation of 3.3,3.43 and 6.73 THz in an appropriate difference frequency crystal.
A diode-end-pumped Nd: YAG dual-wavelength laser operating at 1319 and 1338 nm is demonstrated. Maximum average output power of the quasi-continuous wave linearly polarized dual-wavelength laser was obtained to 2.1 W at a repetition rate of 50 kHz with an output power instability of less than 0.38% and beam quality factor M2 of 1.45. Using the two lines, the highly coherent and narrow linewidth terahertz radiation of 3.23 THz can generated in an organic 4-N, N-dimethylamino- methyl-stilbazolium tosylate (DAST) crystal. While the multi-wavelength red laser at 659.5,664 and 669 nm is generated by frequency doubling and sum frequency processes in a lithium triborate (LBO) crystal. The average red laser output power is enhanced up to 1.625 W at a repetition rate of 15 kHz with an output power instability of better than 0.53% and beam quality factor M2 of 6.05.Using the three lines, it is possible to generate the multi-wavelength THz radiation of 3.3, 3.43 and 6.73 THz in an appropriate di fference frequency crystal.