NdドープLiTaO_3単結晶の育成と室温レーザ発振(<特集>LN,LT結晶の育成と光損傷)
1993 年 20 巻 3 号 p. 281-287
詳細
1993 年 20 巻 3 号 p. 281-287
A continuous, room temperature laser oscillation at 1.063μm is reported for the first time in Nd-doped ferroelectric LiTaO_3 single crystals, pumped with a Kr laser. A relatively low threshold and high slope-efficiency operation are obtained by using a congruent crystal with a Nd concentration of 〜5×10^<19>/cm^3. Any lasing degradation is not observed, when poled single domain crystals are used. The origin of light scattering is very small ferroelectric do-mains inherent to LiTaO_3 crystals and it is clearly demonstrated the effect of a poling condition on lowering a lasing threshold pump power. The minimum threshold is 9 mW of the absorbed pump power.
