| 摘要 |
<p>A fiber type wavelength converter (30) formed of a core (10) and a clad (20) surrounding the core, the core consisting of a first core (10a) formed of a nonlinear crystalline material, for which, if the refractive index to the primary light incident on and guided by the core is represented by eta G < omega > and the refractive index to a converted second harmonic is represented by eta G <2 omega > , the relationship eta G <2 omega > > eta G< omega > holds, and a second core (10b) formed of optical glass covering the first core. Specifically, the optical glass for the second core is such optical glass, for which, if the refractive index thereof to the primary light incident thereon is represented by eta GL< omega >, the relationship <MATH> holds. <IMAGE></p> |
