INFRARED REGION LIGHT EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a light-emitting device that highly efficiently emits infrared region light having a wavelength of≤10μm with a simple constitution, and is usable as a laser light source capable of continuously oscillating at room temperature. SOLUTION: The light-emitting device is provided with a chloride phosphor which includes chloride as a matrix and praseodymium ions (Pr3+), neodymium ions (Nd3+), samarium ions (Sm3+), europium ions (Eu3+, Eu2+), terbium ions (Tb3+), dysprosium ions (Dy3+), holmium ions (Ho3+), erbium ions (Er3+) or thulium ions (Tm3+) as an activator; and a light source for emitting light having a wavelength of≥600 nm and≤2μm to the chloride phosphor. The light emitting device emits light having a wavelength of≥1.5μm and≤8μm. COPYRIGHT: (C)2007,JPO&INPIT