Patent ID: 6055249
Filing Date: 2000-04-25
Classification: G02F

Abstract:
A laser light emitting device comprising:a light source which generates a continuous-wave laser light beam as a fundamental wave;a non-linear optical crystal which generates a second harmonic, on which said fundamental wave is incident with a first power;a second non-linear optical crystal which generates a fourth harmonic, on which the second harmonic generated by said non-linear optical crystal is incident; anda third non-linear optical crystal which generates a fifth harmonic, on which the fundamental wave transmitted through said non-linear optical crystal and the fourth harmonic generated by said second non-linear optical crystal are incident, wherein said third non-linear optical crystal mixes these incident waves to generate said fifth harmonic;wherein the non-linear optical crystal has characteristics such that the second harmonic output from said non-linear optical crystal has a second powers and the second power is 50% to 70% of the first power.